IQQ [August, 



tubercles on the alternate elytral interstices almost obsolete, may belong 

 to it ? There are several allied tmnamed S. American forms in the 



collections before me, all too imperfect to describe, the following two 

 excepted. 



23. — Disema sulcicollis, n. sp. 



Elongate, broad, widened posteriorly, somewhat depressed, feebly shining; 

 piceous, the antennae (joints 1 and 2 excepted) ferruginous, the prothorax and 

 elytra with a brassy or greenish lustre ; clothed with a few bristly hnirs. Head 

 rather small; eyes very large, narrowly separated; antennae comparatively 

 slender, very feebly serrate, not reaching to the middle of the elytra, joint 11 a 

 little longer than 9 and 10 united. Prothorax considerably wider than the 

 head, transverse or about as broad as long, rounded at the sides, constricted 

 before the prominent basal margin; sparsely impressed with intermixed 

 coarse and fine punctures, deeply triangularly excavate in the middle at the 

 base, and sulcate on the disc anteriorly. Elytra broad, moderately elongate, 

 rapidly widening to the middle, somewhat acuminate posteriorly; finely 

 punctato-striate, the interstices broad, more or less convex, 1 and 3, and 

 sometimes 5 also, with several inconspicuous setigerous impressions. Legs 

 long, simple. 



Length Qi-lO^, breadth 3A-4 mm. ( $ .) 



Sal). : Upper Amazons, Ega {II. W. Bates). 



Three specimens, somewhat imperfect. Smaller and less elongate 

 than D. cisteloicles ; the elytra with a metallic lustre, the setigerous 

 impressions reduced in number, small, and evanescent ; the antennae 

 comparatively slender. The male doubtless has these organs more 

 strongly serrate. The much longer third antennal joint, etc., separate 

 D. sithicoJlis from the Central American species of ^p/ci/des. 



24. — Disema oblifemfa, n. sp. 



Moderately elongate, rather convex, widened posteriorly, feebly shining ; 

 fusco-castaueous, the head rufescent, the eyes black, the antennae and legs 

 rufo-testaceous ; clothed, the legs included, with scattered bristly hairs. Head 

 small, coarsely punctate between and behind the eyes, the latter moderately 

 large, well separated; antennae rather slender, feebly serrate, long, joint 11 

 equalling 9 and 10 united. Prothorax wider than the head, about as long as 

 broad, rounded at the sides anteriorly, constricted before the feebly raised basal 

 margin ; impressed with intermixed coarse and fine punctures, depressed in the 

 centre at tlie base, and sulcate anteriorly. Elytra moderately long, rapidly 

 widened to the middle, and there more than twice the width of the prothorax, 

 somewhat acuminate posteriorly ; finely punctato-striate, the interstices feebly 

 convex, 3, 5, 7, and 9 with a series of fine scattered setigerous impressions, 1 

 also with two or three others near the tip. Legs simple, the anterior femora 

 stout. 



Length 71-7^, breadth 2^-3 mm. ( $ P) 

 Ilab. : Brxzil, Kio de .Janeiro (Fri/). 



