Mr. H. W. Bates on Lojigicorn Coleoptera. 101 



margin, and are contiguous or nearly so. The cephalothorax is 

 compressed before, rounded in front and on the sides, moderately 

 convex, glossy, and has an indentation in the medial line ; the 

 falces are conical, rather prominent, and are armed with a short 

 curved fang, and a single pointed tooth on the inner side, near 

 the extremity ; the maxillse are curved towards the lip, and 

 touch at their extremity, which is truncated on the inner side ; 

 the lip is large and somewhat triangular, but rounded at the 

 apex ; the sternum is nearly circular, and glossy ; the legs are 

 long, slender, provided with hairs, and each tarsus is termi- 

 nated by two curved, pectinated claws ; the second pair is the 

 longest, the fourth pair rather surpasses the first, and the third 

 pair is the shortest ; the palpi are moderately long ; the radial 

 joint is much longer than the cubital, and the digital joint, 

 which has an oblong-oviform figure, is tumid, but compact, 

 proving by its undeveloped state that the specimen had not 

 arrived at maturity. These parts are of a pale dull yellowish 

 colour, the falces and lip having a tinge of red, and the anterior 

 part of the cephalothorax a slight tinge of brown. The abdo- 

 men is of an oblong-oviform figure; it is somewhat convex 

 above, projects a little over the base of the cephalothorax, and 

 is clothed with pale soot-coloured hairs, particularly on the 

 upper part ; it has a brownish-white hue, with a faint brownish 

 band, which tapers to its posterior extremity, extending from 

 the base of the upper part, contiguous to the cephalothorax, a 

 little beyond the middle. 



This spider, which was taken in the Island of St. lago, belongs 

 to Walckenaer's family Dept-essa of the genus Scytodes, and is 

 very closely allied to the Scytodes erythrocephala of Koch (Die 

 Arachniden, Band v. p. 90, tab. 168. figs. 399, 400), but may 

 readily be distinguished from it, even when immatui'e, by marked 

 differences in the structure of the palpi, and especially by the 

 form of the digital joint. 



X. — Contributions to an Insect Fauna of the Amazons Valley. 

 Coleoptera : LoNGICOR^fEs. By H. W. Bates, Esq. 



[Continued from vol. xv. p. 394,] 



29. Colohothea neevigera, n. sp. 



C. modice elongata, postice regulariter attenuata, nigricans, sericea, 

 vertice thoraceque supra lineis duabus, elytris maculis paucis 

 discretis, cinereis ; his truncatis, angulis externis spinosis. Long. 

 4L-7^1in. J$. 



Head black, forehead with three ashy lines, cheeks with a 

 spot of the same colour, and vertex marked with two ashy lines 



