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| Registros recuperados: 191 | |
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| Ritsema Cz., C.. |
| Very closely allied to and much resembling A. ventralis Moser ¹) from Tonkin and of the same length (9.5—10 mm.) but proportionately broader and less parallel. Both species have the base of the abdomen (the two basal ventral segments) and the apex of the elytra dull black, the anterior tibiae tridentate and the sides of the abdomen not sharply margined. The new species is distinguished from ventralis: 1° by the broader and less parallel shape of the body; 2° by the punctuation of the pronotum, the punctures being somewhat larger and slightly more distant from one another; 3° by the space between the humeral costa and the first of the two lateral interstices, which space is broader behind the shoulders than it is in ventralis; 4° by the more conspicuous... |
| Tipo: Article / Letter to the editor |
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| Ano: 1913 |
URL: http://www.repository.naturalis.nl/record/509272 |
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| Ritsema Cz., C.. |
| Length of the male 44 mm., of the female 54 mm.; breadth at the shoulders in the male 15,5 mm., in the female 19 mm. Smooth and shining; black, with the elytra of a beautiful metallic green; the body covered with extremely small scales of a whitish green, forming transverse bands on the elytra and abdominal segments, irregular on the former, widely interrupted on the latter; the antennae annulated and the legs banded with whitish blue. |
| Tipo: Article / Letter to the editor |
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| Ano: 1880 |
URL: http://www.repository.naturalis.nl/record/509119 |
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| Ritsema Cz., C.. |
| The species described in this Note and dedicated to the late Dr. E. Candèze of Glain near Liege is very interesting necessitating the establishment of a new section in my Synopsis of the species of this genus 1). It belongs to the division I (base of elytra coloured as the apex), A (elytra with four convex flavous spots), b (pronotum finely and evenly punctured, without raised patches), but it has the prosternum neither entirely fulvous (α), nor fulvous in the middle with the lateral portions metallic green (β): in the new species the prosternum is entirely of a dark metallic green colour. |
| Tipo: Article / Letter to the editor |
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| Ano: 1899 |
URL: http://www.repository.naturalis.nl/record/509376 |
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| Ritsema Cz., C.. |
| Besides Helota Vigorsii Mac Leay no other Helota-species were as yet known from Borneo ¹). Now, in a recent consignment of beetles, received by Mr. Neervoort van de Poll and brought together in the Doeson-countries (S. E. Borneo, 1° South, 115° East) by Mr. Wahnes, two new species, each represented by a single female specimen, were present, and Mr. van de Poll kindly allowed me to describe them. One of them, which I have much pleasure in naming after its possessor, is allied to Helota Feae Rits. from Burma ²), the other to the Japanese Helota cereopunctata Lewis ³). |
| Tipo: Article / Letter to the editor |
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| Ano: 1891 |
URL: http://www.repository.naturalis.nl/record/509108 |
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| Ritsema Cz., C.. |
| Length 30 mm., breadth at the shoulders 7,5 mm. — Dark chestnut-brown, approaching to black on the thorax; the elytra testaceous-brown, becoming paler towards the end, narrowly bordered with dark brown; each of them has laterally a dark brown harpoon-shaped figure, which extends from the base down to a little behind the middle; the point of this blotch is directed backwards, the recurved hook inwards: |/ \|. The head and prothorax furnished with scattered ochraceous decumbent hairs; the eyes bordered with a dense ochraceous pubescence; the antennae, with the exception of the two basal joints, densely covered with erect slender pale-coloured hairs; the prothorax provided on the disk with two longitudinal lines of a dense white pubescence. The scutellum... |
| Tipo: Article / Letter to the editor |
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| Ano: 1881 |
URL: http://www.repository.naturalis.nl/record/509210 |
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| Ritsema Cz., C.. |
| Length 21 mm., breadth at the shoulders 8 mm.; length of the antennae 27 mm. Glabrous; brick red, with the labrum, apical joint of the palpi, apex of the mandibles, eyes, antennae, apex of the thoracical spines, legs (except the coxae and the intermediate and posterior trochanters), scutellum and extreme apical margin of the ventral segments, black, and the apical fourth of the elytra dark steel blue with a faint violet hue; the under surface of the base of the third and following joints of the antennae with a spot of whitish pubescence. |
| Tipo: Article / Letter to the editor |
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| Ano: 1881 |
URL: http://www.repository.naturalis.nl/record/508647 |
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| Ritsema Cz., C.. |
| Length from the forehead to the end of the elytra 9 mm., breadth at the shoulders 3½ mm.; length of the antennae 9½ mm. — Rather dull testaceous-yellow; the mandibles (except at the base on the outside), the eyes and the claws dark brown, the seven apical joints of the antennae blackish, the apex of the elytra bluish black; covered with rather long erect pale coloured hairs, the elytra moreover with a greyish slightly sericeous pile, the bluish black apical portion, however, excepted. The head is armed on the middle of the face with a strongly compressed projection or horn, which has, when seen sideways, the shape of a shoe, the frontmargin of which (the sole) is fringed with two rows of diverging long fulvons hairs, which are very densely set and form a... |
| Tipo: Article / Letter to the editor |
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| Ano: 1888 |
URL: http://www.repository.naturalis.nl/record/508861 |
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| Ritsema Cz., C.. |
| Allied to Helota sinensis Oll. and tonkinensis Rits., but distinguished by the differently coloured prothorax and legs, and, in the male sex, by the want of pubescence in the semiovate impression on the apical ventral segment, and by that of the tuft of long hairs on the inside of the apex of the posterior tibiae. Length 8 mm. — Above rugose in consequence of a very dense punctuation, the sutural streak, however, slightly shining; provided on each elytron with two yellow convex spots and with four rows of slightly raised glossy warts of different shape and size. The colour of the upper surface is dark greenish bronze, the scutellum and the sutural interstices coppery; the anterior lateral angles of the pronotum fulvous; the antennae fulvous, the top of the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1906 |
URL: http://www.repository.naturalis.nl/record/509215 |
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| Ritsema Cz., C.. |
| In two recently arrived consignments of Natural History objects from Simalur and neighbouring islets, brought together by Mr. Edw. Jacobson who since has left this locality, were 3 female Lucanidae belonging to different species and found on the island Simalur. They are: 1'. Odontolabis gracilis Kaup, in v. Harold’s Coleopterologische Hefte, IV (1868), p. 77. — Leuthner, Trans. Zool. Soc. London, XI (1885), p. 438. One female (n°. 3981) from Sinabang, May 1913. |
| Tipo: Article / Letter to the editor |
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| Ano: 1913 |
URL: http://www.repository.naturalis.nl/record/509169 |
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| Ritsema Cz., C.. |
| 1. I have proposed (cf. Deyroll’es Naturaliste. VI. p. 559, 15 Nov. 1884) to substitute the generic name Darala Ritsema (Notes Leyd. Mus. VI (1884). p. 81, Hynienoptera: Larridae) nec Darala Walker (List Lepid. Ins. Brit. Mus. IV (1855). p. 886, Lepidoptera: Bombycidae) by Dalara. 2. Xylocopa Forbesii Kirby ♀, from the Timor-Laut Islands (Proc. Zool. Soc. London. 1883. p. 344) = coronata Smith (Journ. Proc. Linn. Soc. Zool. V (1861). p. 135) from Kaioa (Brit. Mus.) and Halmaheira, Batjan and Ternate (Leyd. Mus ), the different iridescence of the wings, the only difference mentioned by Mr. Kirby, not being of specific value, as the specimens in the Leyden Museum, although doubtless belonging to one and the same species, show considerable variations in that... |
| Tipo: Article / Letter to the editor |
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| Ano: 1885 |
URL: http://www.repository.naturalis.nl/record/508540 |
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| Ritsema Cz., C.. |
| 1. Eurytrachelus Lansbergei Gestro ( Annali del Museo Civico di Storia Naturale di Genova. vol. XVI (1881) p. 320, fig.) = var. max. of Eurytrachelus eurycephalus Burmeister ( Handbuch der Entomologie. vol. V (1847) p. 387. — Snellen van Vollenhoven, Tijdschrift voor Entomologie. vol. VIII (1865) p. 151, pl. 10, fig. 4. — Parry, Transactions of the Entomological Society of London for the year 1874. p. 371). 2. Eurytrachelus coranus Gestro (l. c. p. 321. fig.) = var. minor of Eurytrachelus arfakianus Lansberge (Comptes- Rendus des Séances de la Soc. Entom. de Belgique. ann. 1880. p. CXVIII). |
| Tipo: Article / Letter to the editor |
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| Ano: 1881 |
URL: http://www.repository.naturalis.nl/record/508555 |
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| Ritsema Cz., C.. |
| Synonym: Figulus subcastaneus v. Voll. (nec Westwood), Tydschrift voor Entomologie. Dl. VIII (1865) p. 146 n°. 146 and p. 156. Allied to Figulus subcastaneus Westw. ¹) but quite distinct from that species by the different tuberculation of the head, by the comparatively longer prothorax and the presence of a tubercle on the middle of its front margin, by the different sculpture of the lateral margin of the elytra, etc. |
| Tipo: Article / Letter to the editor |
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| Ano: 1879 |
URL: http://www.repository.naturalis.nl/record/509204 |
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| Ritsema Cz., C.. |
| 5 ♀ (which wholly agree with one another) and 1 ♂ (which differs from the females by its more coarsely faceted eyes which are moreover more prominent and more approximate on the middle of the face, and by the narrower and more elongate apical segment of the abdomen 1)) were sent over from Serdang (East Sumatra) by Dr. B. Hagen to whom I dedicate the species. Very close to I. forficuloides Fairm. of Borneo, and, judging from the description (Stett. Ent. Zeit. 1867. p. 114), agreeing with it in every respect besides in the following: the head is black with the face and a small spot beyond the base of the eyes yellow; the black lateral band of the elytra suddenly narrows on the apical third (except in the male specimen); the three basal segments of the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1883 |
URL: http://www.repository.naturalis.nl/record/508619 |
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| Ritsema Cz., C.. |
| Mr. René Oberthür of Rennes has received from his friend the R. P. Bretaudeau an interesting lot of Helotidae brought together in the environs of Kurseong. This lot, sent to me for identification by Mr. Oberthür, contains the following species: Fairmairei Rits., several examples of both sexes. Desgodinsi Rits., a single female described in this Note. attenuata n. sp., two female specimens, described in this Note. |
| Tipo: Article / Letter to the editor |
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| Ano: 1894 |
URL: http://www.repository.naturalis.nl/record/508682 |
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| Ritsema Cz., C.. |
| Length 30 millim.; breadth at the shoulders 7 millim. — Above dull red, the mandibles and the vertex of the head as well as the antennae black; the anterior half of the pronotum provided with two elongate slightly curved and divergent black spots which bear on their posterior end a nipple-shaped tubercle; between these tubercles and the base of the pronotum, but somewhat more outwardly, a slightly raised punctiform black dot is present; the scutellum is covered with red and with black hairs. — Body beneath dull black, the extreme hinder margin of the four basal ventral segments very shining; the legs subnitid, black, the anterior and intermediate coxae red; moreover a band across the base of the prosternum and its front margin, as well as the throat, red.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1895 |
URL: http://www.repository.naturalis.nl/record/509357 |
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| Ritsema Cz., C.. |
| 1. Pachyteria zonopteroides Fleutiaux, Annales de la Société Entomologique de France, 1887, p. 66; pl. 4, fig. 6 = Callichroma Griffithii Hope, Transactions of the Linnean Society of London. Vol. XVIII (1840) p. 440; tab. 80, fig. 2. ( Aphrodisium Griffithii Hope in the Munich Catalogue), 2. Euoplia argenteo-maculata Aurivillius, Entomologisk Tidskrift. Bd. VIII (1887) p. 196, fig. 3 = Lamia pulchellator Westwood, Proceedings of the Zoological Society of London, 1837, p. 128. ( Batocera pulchellator Westw. in the Munich Catalogue). |
| Tipo: Article / Letter to the editor |
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| Ano: 1888 |
URL: http://www.repository.naturalis.nl/record/508820 |
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| Ritsema Cz., C.. |
| Head transverse, much wider than the thorax, emarginated behind at the vertex, swollen behind the eyes; face distinctly prominent, provided with various depressions, the angles below the eyes angularly produced; eyes strongly divergent (making the face much wider beneath than above), large, narrowing towards the mandibles, the inner orbit straight; only one well developed ocellus; antennae filiform, inserted just above the base of the clypeus, the scape a little enlarged and compressed at its apical twothirds, a little longer than the first and 2nd joints of the flagellum taken together, the 3rd and 4th joints of the flagellum distinctly notched at the extreme base, the 5th very faintly so, the 2nd to 10th gradually decreasing in length, the 11th or apical... |
| Tipo: Article / Letter to the editor |
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| Ano: 1884 |
URL: http://www.repository.naturalis.nl/record/508626 |
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| Ritsema Cz., C.. |
| A large and robust species which is closely allied to A. viridipennis Gestro from Sarawak, of which I have the type before me, but still larger, measuring 16 mm. in length instead of 13 mm.; moreover the elytra are not green but black with a faint purplish hue, and the clypeus is longer and only inconspicuously emarginate in front, the sides of the prothorax are less angularly rounded when viewed laterally, and the first and second elytral costae are not bordered (on both sides) with a narrow slightly impressed stripe, which stripes, in viridipennis, make the impression of being pairs of very fine lines. Glabrous, glossy black, the elytra with a faint purplish hue, the palpi and antennae ferruginous. |
| Tipo: Article / Letter to the editor |
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| Ano: 1896 |
URL: http://www.repository.naturalis.nl/record/508863 |
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| Registros recuperados: 191 | |
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