Stup 111/ Jin idee vf the A m azon I ''a lley . 227 



upper side the Mud ]oart of the 7th segment is distinctly 

 produced in the middle. 



3. Sphceronum carinifrons, n. sp. Nigro-fuscum, 

 opacum, abdomine rufescente; pedibus testaceis; dense et 

 (fronte excepta) subtilissime punctatum. Long. corp. 

 41 lin. 



Allied to S. opacum, but much smaller, the head nar- 

 rower, and the antennas shorter. Antennae nearly as long 

 as head and thorax, dusky red ; 1st joint longer than the 

 two following together, 2nd shorter than 3rd, 4 — 10 

 scarcely differing from one another. Palpi reddish. Head 

 nearly as broad as the elytra, quite dull, densely and finely 

 punctured, the front part not so densely and finely as the 

 back ; it is also densely and finely pubescent ; it is pro- 

 duced behind into a short stout tricarinate neck, and in 

 front has besides the prominences over the antennae, — a 

 distinct elevation between these. The thorax is distinctly 

 narrower than the elytra, about twice as long as broad, 

 narrowed behind, and still more strongly narrowed to the 

 front ; its greatest breadth is at fully two-thirds of the 

 distance from base to apex ; it is very densely and finely 

 punctured, and has a distinct fine carina in the middle at 

 the base. The elyti-a are very dark and obscure reddish, 

 very densely and finely punctured, not quite so long as 

 the thorax. The hind body is rather paler than the other 

 parts, obscure dull reddish, very densely and finely punc- 

 tured, rather incrassated at the extremity. The legs are 

 yellow. 



Ega ; one specimen. 



4. Sphceronum elonyatum, n. sp. Angustum, nigro- 

 fuscum, opacum, elytris abdomineque rufescentibus, pedibus 

 testaceis ; capite subopaco, dense subtiliter pvinctato. 

 Long. corp. 3f lin. 



Mas : abdomine segmento 6° ventrali longitudinaliter 

 impresso, apice minus profunde exciso; segmento 7° basi 

 late impresso, apice sat profunde exciso. 



Closely allied to 'S'. carinifrons, but smaller and nar- 

 rower, and with the head less densely and not rugosely 

 punctured, so that it is not altogether opaque. The 

 antennae are pitchy black, nearly as long as head and 

 thorax, joints 2 — 10 differing but little from one another. 

 Head about as broad as the elytra, slightly shining, 

 densely and finely punctured and pubescent; the back 



Q2 



