Coleoptei'ological Notices^ VI. 537 



ate in size, convex and prominent, not attaining the base. Prothorax one-half 

 Avider than long, the sides broadly arcnate behind, gradually slightly conver- 

 gent and straighter anteriorly, the apex arcuato-trunc<ate, slightly narrower 

 than the base which is birt slightly more arcuate; all the angles ol)tuse and 

 rounded ; disk finely, sparsely punctate, the interspaces smooth and polished 

 throughout. Elytra short, not quite one-half longer than Avide, slightly but 

 distinctly wider than the prothorax, very obtusely rounded at apex, the sides 

 nearly parallel and straight; punctures rather fine hut strong and somewhat 

 close-set. Abdomen shining but distinctly cinereo-pubescent, the legs and 

 tarsi long and slender. Length 2.3 mm. ; width 0.9 mm. 



Lower California. 



The single male type in my cabinet has the fifth ventral broadly 

 truncate, the genital segment broadly sinuato-trnncate, flat and 

 finely canaliculate along the middle, and the inner spur of the two 

 anterior tibiae broadly dilated, thickened and as usual very obtuse 

 at apex. 



SYDATES n. gen. 



The single representative of this genus is a rather stout oblong 

 insect, which is intermediate in some of its characters between 

 Trichochrous and Listrus, but which differs from both in its long 

 and strongly serrate antennae and in the form of the nngual ap- 

 pendages, these being acutely pointed and leaving nearl3' one-half 

 of the inner claw free. The anterior tibine have a few long and 

 slender bristle-like spines along the outer side, which are much 

 less conspicuous than in Trichochrous, and the general habitus 

 and ornamentation of the body is remindful of Listrus. The 

 epipleurai are very narrow and indistinct, slightly wider toward 

 base and with their plane inclined upward externally. 



1. S. zonatlis n. sp. — Oblong, strongly convex, polished, black; legs pale 

 rufo-ferruginoiis, with the thighs rather stout and in great part blackish; anten- 

 n;c pale, gradually blackish toward apex, the basal joint also obscure; pubescence 

 rather dense, moderate in length, even, without intermixed erect hairs, cine- 

 reous but broadly blackish along the middle of the pronotum and in a broad 

 fascia at base and apical fourtli of the elytra, the fascijc narrowly interrupted 

 along the suture. Head two-thirds as wide as the prothorax, flat, finely and 

 sparsely punctate and feebly subrugulose, the frontal impressions large, ap- 

 pro.ximate and distinct; epistoma very short; labrum short, transverse and 

 feel)ly arcuato-truncate; eyes moderately large and somewhat prominent; an- 

 tenn;e distinctly longer than the hejid and prothorax, stout, filiform, the 

 joints slightly longer than wide, asymmetric and strongly narrowed toward 

 base, the inner obtuse jirojections densely bristling with short stiff seta'. Pro- 

 thorax four-fifths wider than long, the sides rather strongly rounded near basal 



