316 CALIFORNIA ACADEMY OF SCIENCES. 



HOMALIUM Grav. 



H. algarom ^- sp. — Form narrow, rather distinctly attenuated anteriorly, 

 depressed; body castaneous; lateral margins of the pronotiim, elytral humeri 

 and apices externally, and a very small clouded spot on each elytron near the 

 scutellum paler, testaceous; lateral margins of abdomen paler; first six joints 

 of antennae fuscous, remainder black; under surface pale especially the pro- 

 notal and elytral hypopleurse; legs rufo-testaceous, femora darker; head, 

 pronotum and elytra entirely glabrous, abdomen having a few extremely 

 short and very sparse hairs; sub-alutaceous. Head ra'^her small, slightly 

 ■wider than long; eyes moderate, finely granulate; sides behind them short, 

 very strongly convergent; base constricted, the constriction extending 

 upon the dorsal surface; front very slightly produced a-; a broad muzzle 

 between the antennns, feebly impressed near the base of each antenna; hav- 

 ing two feeble, distinct impressions on a line through the middle of the eyes 

 and immediately in froat of the small but very prominent ocelli, which are 

 sub-triangular; surface shining, coarsely, strongly aud very sparsely punc- 

 tate, aluta?eous near the antennae; the latter short, three-fourths as long as 

 the head and prothorax together; basal joint twice as long as wide, shorter 

 than the next two together, second longer than wide, as long as the fourth 

 and three-fourths as long as the third, the latter very slender, clavate, three 

 times as long as wide; joints six to eleven gradually wider, forming a rather 

 well-marked club, tenth much wider than long. Prothorax widest at two- 

 fifths its length from the apex where it is more than one-third wider than the 

 head and about one-third wider than long; sides parallel, more strongly arcu- 

 ate anteriorly, straight near the basal angles which are obtuse and distinctly 

 rounded; base feebly and evenly arcuate, very slightly narrower than the 

 disk and as wide as the apex; the latter broadlj' and feebly incurvate; apical 

 angles rather broally rounded; disk depressed, impressed along each side 

 toward the base, having in the middle two elongate, parallel and well-marked 

 impressions, finely margined on all sides, rather coarsely, deeply, irregularly 

 and extremely sparsely punctate ; all impressed and depressed areas aluta- 

 ceous. Elytra at base very slightly wider than the pronotum; sides nearly 

 parallel and almost str.iight; apical angles broadly rounded; together trun- 

 cate behind, slightly and evenly incurvate in the middle; disk nearly twice 

 as long as the pronotum, nearly one-fourth linger than wide, depressed, 

 abruptly declivous along the sides, broadly aud very feebly impressed along 

 the suture, coarsely alutaceoas and sub-rugulose, rather finely aud sparsely 

 punctate. Abdomen with five exposed segments, shorter and slightly nar- 

 rower than the elytra; sides of the first three segments parallel and straight; 

 surface broadly aud moderately convex, finely sub-alutaceous, excessively 

 minutely, feebly and almost iudistinguishably puuctate; border very deep 

 and strongly inclined. Legs stout and robust; first four joints of the pos- 

 terior tarsi short, equal, together much shorter than the fifth; middle femora 

 short, very thin, wide and bent very strongly upward; posterior femora 

 feebly bent. Length 3.8 mm. 



