30 Mr. C. J. Gahan on Longicorn Coleoptera 



half as long af^ain as the fourth. The femora are somewhat 

 gradually tliickened from the base up to beyond the middle, 

 and not abruptly thickened, or clavate, between the middle 

 and apex as in some other species of the genus. 



In X. hrevipennis the antennas of the male are, according 

 to Mr. Bates's description, much shorter than the body. 

 This character will afford a further means of distinguishing 

 hrevipennis from denticornis. It is necessary to add, how- 

 ever, that the females of some of the species of the present 

 genus might easily (without recourse to dissection) be mis- 

 taken for males. 



Xestia spinipenmSj Serv. 



Prothorax transversely and almost regularly wrinkled 

 above, irregularl}^ rugose at the sides, slightly narrowed 

 anteriorly. Elytra highly polisiied, very minutely punctu- 

 late, and of a reddish chestnut-colour. Femora somewhat 

 abruptly thickened between the middle and the apex. Third 

 joint of the antennse in the female — the only sex known to 

 nie — twice as long as the fourth ; the scape thickly and 

 somewhat rugosely punctured. The iiead also strongly 

 enough but not very thickly punctured. 



These sup])lementary characters oi X. spinipennis, Serv., I 

 have drawn up from a female example (from Serville's col- 

 lection) which in Chevrolat's writing has been labelled ti/pe. 

 It will be well also to direct attention to the fact that the 

 species — under the name of X. spinipennis, Serv. — with which 

 Mr. Bates has made comparisons in describing some of his 

 species was not the true spinipennis oi Serville, but probably 

 X. denticornis (the X. sjjinipennis o( most collections), which 

 is quite a different species. 



Xestia vittataj Thoms. 



The specimens answering to the description of this species 

 varv considerably in size. 



1 can find no characters by which to distinguish a specimen 

 from Dejean's collection — ticketed A', conftisaj Dcj. — from 

 examples of vittata, Tlioms. The antenna? are eleven-jointed, 

 as in the latter species. 



There is, however, one specimen in the British-^Iuseum 

 collection which (in almost every other respect agreeing 

 with confusa, Dcj ) has twelve distinct joints to the antenna;. 

 It was no doubt a specimen similar to this which was 



