466 Coleopferological Notices, V. 



rather deep sulcus ; eyes prominent, slightly longer than the tempora which 

 are feebly convergent and nearly straight ; antennae twice as long as the 

 head ; under surface with sparse capitate setae. Prothorax slightly wider than 

 long, widest before the middle, the transverse sulcus deep, strongly dilated 

 backward in the middle, situated at basal fourth ; fovese deep ; sides conver- 

 gent and nearly straight in basal half. Elytra not quite as long as wide, 

 three-fourths longer than the prothorax and nearly twice as wide ; sides 

 strongly arcuate ; discal stria fine, extending fully to the middle. Abdomen 

 distinctly narrower than the elytra but nearly as long, parabolic behind. 

 Legs scarcely modified in the male, the two anterior shorter but not much 

 stouter. Length 1.1 mm. ; width 0.4 mm. 



California (Marin Co.). 



In the unique male type, the sexual apparatus is fully protruded 

 and is of immense size in proportion to the body. The flat pygi- 

 dium, horizontal in its normal position, is seen to be the external 

 CO veering of a large cylindrical sack-like bod}^ one-half longer than 

 wide and one-half as long as the entire abdomen, having attached 

 to the anterior border of its free extremity, two long acute and com- 

 plicated processes, which are gradually eyerted toward apex. The 

 plate-like cover of the large cylindrical body, referred to as the flat 

 pygidium, is displaced in this specimen, and the interior of the sack 

 seems to be filled with a white spongy material. 



A. pacifiCUin n. sp. — Moderately stout, convex, pale flavo- ferruginous 

 throughout, shining, subimpunctate ; pubescence very short, recumbent, 

 rather abundant. Head much narrower but only slightly shorter than the 

 prothorax, nearly as long as wide, the eyes — viewed from above — feebly con- 

 vex, not prominent, situated rather behind the middle on the sides and as long 

 as the tempora, the latter straight and parallel behind them ; outline before 

 the eyes and around the apex almost evenly parabolic ; surface rather flat ; 

 fovese minute but deep, nude, at the middle, separated by one-half the total 

 width, connected by a very feeble parabolic sulcus ; antennal tubercles broad 

 and flat, crossed by a fine but deep and conspicuous groove ; antennae miss- 

 ing ; under surface very sparsely setose. Prothorax very nearly as long as 

 wide, widest and broadly rounded near the middle ; sides convergent and 

 nearly straight thence to the apex and base, the former four-fifths as wide as 

 the latter; sulcus deep, between basal third and fourth, strongly dilated in 

 the middle ; foveas very large but nude. Elytra three-fourths longer than the 

 prothorax and nearly twice as wide, the discal stria extending to the middle. 

 Abdomen as long as the elytra but much narrower, parabolic toward apex. 

 Legs moderate. Length 1.1 mm. ; width 0.4 mm. 



California (Siskiyou Co.). 



The male has a large terminal pygidium which is not rounded as 

 in the other species but rectangular, with straight sides and apex, 



