118 Proceedings of the 



Dr. Greville, whose qualifications as a microscopic observer and 

 microscopic draughtsman are unsurpassed, to submit the differ- 

 ences to the reader, in the woodcuts, figs. 15, 19 and 20, drawn 

 by him, which show the sculpture of the thorax of the three 

 kinds as seen under a magnifying power of 280 diameters. These 

 I think prove the close relationship of rotundicollis, fig. 19, with 

 tristis and grandicollis (both of which are exactly the same), fig. 15 : 

 the punctures from which the hairs issue are only a little larger 

 and deeper in the former than in the latter, which also shows 

 the first faint traces of the circular depressions between these 

 punctures in the former. In neglectus however, although there 

 are deep circular depressions, these are on a totally different 

 arrangement from those in the other species. Here they sur- 

 round the puncture from which the hairs spring, while in rotun- 

 dicollis they are placed between the hairs. In neglectus the con- 

 cave curve of the depression is turned towards the hair, in rotun- 

 dicollis it is the convex curve which is turned to it. 



Although the character is narrow, I incline to think that 

 this is a good species, more especially as M. Kraatz mentions 

 that nothing approaching to a transition between it and rotun- 

 dicollis has been found. 



This interesting species was taken by M. Kraatz in Hessia, 

 but I have not yet observed it in any collection made in this 

 country. 



16. C. quadraticollis, Aube. 



Catops quadraticollis, Aube, Ann. de la Soc. Ent. de Fr. 1850, viii. 326. 

 35. t, 11. f. 3; Fairm. & Laboulb. Fn. Ent. Fr. i. 302. 



Oblongo-ovalis, convexiusculus, niger; anten- Fig. 21. 



narum articulis primis et ultimo, tibiisque 



ferrugineis ; thorace quadrato, vix postice an- 



gustiore, angulis posticis rectis. 

 Long. If lin. 



Oblong-oval, convex. Brownish black, co- 

 vered with a sparing yellowish- grey pubescence ; 

 mouth and base of the antennae obscure ferru- 

 ginous. Antennae gradually clavate, a little 

 longer than the head and thorax. Thorax almost as broad 

 as long ; sides feebly arched, almost straight, except in front, 

 where they are pretty strongly rounded ; posterior angles right- 

 angled, a little sharply pointed ; very finely and densely punc- 

 tate. Elytra with a more marked punctuation, very dense ; 

 sutural stria deep, disappearing on the anterior third. "With a 

 strong lens some traces of striae are perceptible. Thighs brown- 

 ish black, tibiae and tarsi obscure ferruginous. 



