126 MEMOIRS ON THE COLEOPTERA 



Very different from the preceding in the smaller size, less convex 

 and more shining surface, conformation of the sides of the head and 

 in the male sexual characters. 



Atheta (Adota) pavidula n. sp. Slender, subdepressed, parallel, 

 strongly shining throughout, the micro-reticulation obsolete except on 

 the elytra, large and almost regularly polygonal on the abdomen but very 

 feeble; punctures minute, not dense, inconspicuous, rather numerous on 

 the abdomen; pubescence moderately short and somewhat coarse, 

 inconspicuous, longer and rather more distinct on the abdomen; color 

 black, the legs pale, the prothorax and elytra very feebly picescent; head 

 evidently wider than long, only very slightly narrower than the prothorax, 

 the eyes large, prominent, at distinctly less than their own length from 

 the base, the tempora less prominent, straight and parallel for a short 

 distance, then gradually and evenly rounding to the base, the carinae 

 fine and not quite entire; antennae long, very slender, gradually and just 

 visibly incrassate, nearly black throughout, the second and third joints 

 subequal, the fourth much elongated, fifth to seventh distinctly elongate, 

 eight to ten somewhat abruptly a little wider and distinctly wider than 

 long, mutually subequal, the last narrowly ogival, as long as the two 

 preceding; prothorax two-fifths wider than long, just visibly widest 

 before the middle, where the sides are broadly and feebly rounded, 

 straight thence to the base, the transverse ante-scutellar impression 

 rather deep and distinct; elytra subquadrate, with just visibly diverging 

 sides, at base only very slightly wider, the suture nearly one-half longer, 

 than the prothorax; abdomen narrower than the elytra, parallel, with 

 straight sides, the tergites equal. Length 2.0 mm.; width 0.41 mm. 

 California (Boonville, Mendocino Co.). 



This species differs almost subgenerically from the two preceding, 

 but I do not know where else to place it, as the coxae do not seem 

 to be sufficiently contiguous to admit of association with Hydro- 

 smecta, in spite of the very slender and subfiliform antennas. 

 There are no distinct indications of sex in the unique type. 



Atheta (Adota) irrita n. sp. Not parallel, slightly convex, distinctly 

 shining, the micro-reticulation everywhere distinct, feeble on the head, 

 large and almost regularly polygonal though feeble on the abdomen ; color 

 black throughout, the legs pale, the femora in great part blackish; punc- 

 tures fine, close but scarcely visible, rather sparse on the abdomen; 

 pubescence very short, plumbeous and inconspicuous; head almost as 

 wide as long, four-fifths as wide as the prothorax or a little less (9), 

 the eyes moderate, prominent, at their own length from the base or less, 

 the tempora equally prominent, parallel and rounded for less than the 

 length of the eyes behind them, then rounding to the base, the carinae 

 obsolete; antennae black, only moderately long, rather slender though 

 gradually and distinctly incrassate, the third joint almost as long as the 

 first, strongly, evenly obconic, four to ten mutually subsimilar but 



