356 LAMIID.E. 



9. PTERIDOTELUS, n. g. 



In general form and appearance closely resembles the genus 

 Acanthoderes, but differs from all the numerous species of that 

 genus in the peculiar form of the antennae. The sixth and 

 seventh joints are much wider than the preceding and are dilated 

 at the end; the four following joints are short; the ninth and 

 tenth joints have a blunt tooth at the base on one side * ; the 

 last six joints form a kind of club. The thorax has three dorsal 

 ridges. 



1. Pteridotelus laticornis, n. s. PI. IX. f, 2. B.M. 



P. pilis griseis et albis tectus et nigro-punctatus ; antennarum 

 articulis nigro et cinereo annularis ; thoracis marginibus 

 anticis posticisque nigro-punctatis ; scutello medio cinereo, 

 lateribus nigris; elytris singulis, maculis sex nigris, tribus 

 marginalibus, tribus fusco-circumdatis ; femoribus incrassatis 

 cinereis, nigro-variegatis ; tibiis cinereis nigro-annulatis ; tarsis 

 supra cinereis, articulo secundo et tertio basi nigris. 



Closely covered with grey and white hairs and spotted with 

 black ; antennas cinereous, ringed with black, the terminal joints 

 nearly wholly black, except at the bases, which are grey ; thorax 

 with the front and hind edges dotted with black. Elytra deli- 

 cately varied with grey and white, and with a few black dots ; 

 on each are six larger black spots, three of them on the mar- 

 gin, the other three surrounded with brown hairs; there are 

 a few small black warts on the shoulder and at the base of the 

 ridge which traverses each elytron. The thickened femora are 

 cinereous and variegated with darker colour ; the tibia? are grey 

 and ringed with black ; the tarsi are grey above, the second 

 joint and the third joint at the base are black ; the soles are 

 yellowish. 



Length 5f to 6i lines. 

 Hab. Venezuela. 



10. ACANTHODERES. 



Acanthoderes, Serv. Ann. Soc. Ent. Fr. iv. 29. 

 Lamia, p., Germ. 

 Cerambyx, p., 01' v. 



* These two joints resemble similar joints in the males of some 

 species of the Hymenopterous genus Crabro. 



