BY ARTHUR M. LEA. 189 



consideration the further structural differences mentioned (together 

 with others which might only be regarded as specific) it appears 

 advisable to generically separate the two species. 



POROPTEROIDBS DICHOTOMUS, n.Sp. 



Short, subcylindric. Black, opaque; antennne and claw-joint 

 piceous-red. Very densely clothed all over with ferruginous 

 scales tinged with ochreous on posterior declivity and shoulders 

 of elytra, paler beneath than above; pectoral canal densely clothed 

 with scales which are paler and longer than elsewhere; elongate 

 but coarse scales feebly showing on prothorax and base of elytra, 

 more noticeably on tubercles at summit of declivity. Under surface 

 and head between eyes with elongate scales. Rostrum with scales 

 at base and sides, and with others smaller and sparser continued 

 almost to apex. Ciliation sparse, short, white. 



Head without visible fovea. Rostrum feebly increasing in 

 width to apex ; densely and irregularly punctate ; a groove 

 extending on each side from base to slightly in advance of 

 antennsfi, and with several less distinct grooves more or less 

 interrupted by punctures. Antennae elongate ; scape inserted 

 about one-third from apex of rostrum, passing apex; basal joint 

 of funicle not much shorter than 2nd, 2nd no longer than the two 

 following combined, 4th slightly longer than 3rd, 7th transverse; 

 club free, elongate. Prothorax longer than wide, and slightly 

 wider than deep, apex about one-third the width of base, obliquely 

 increasing in width to about the middle, feebly decreasing from 

 thence to base; disc convex. Elytra, not much longer and very 

 slightly wider than prothorax; posterior declivity almost vertical, 

 broad and flat, and slightly longer than rest of elytra, its summit 

 marked with two moderately distinct rounded tubercles on each 

 side, one on 2nd the other on 3rd interstice, the scales on the 

 tubercles slightly darker than on declivity, but paler than on 

 disc; sides somewhat flattened, between tubercles and margins 

 with seven rows of punctures, the striation distinct, but the 

 punctures almost hidden, and entirely covered with scales. 



