AMERICAN COLEOPTERA. 191 



nearly square, not lobed in front; base slightly emarginate in the arc of a 

 circle; mesosternuni without stria. Front tibiee broadly triangular, with the 

 apical external angle about the middle of the length; middle and hind tibiae 

 slender, slightly curved; hind tarsi distinctly 5-jointed. Length 1.4 ram. 



San Bernardino, Cala. It gives me much pleasure to dedicate this 

 very interesting addition to our fauna to Mr. A. Bolter, by whom it 

 was collected. The size is unusually large for this group, being a little 

 larger than Acritus maritinius. The front tibiae are nearly like those 

 of the East Indian A. paria represented by Marseul, Ann. Ent. Soc. 

 France, 1856, pi. 14, xlii, 3 e. 



HOPI.IA 111. 

 The males in this genus differ from the females by the larger size 

 and greater thickness of the hind tibiae and tarsi. Frequently also, 

 great sexual differences are seen in the clothing of the body, which 

 is more scaly in the female, and more hair-like in the male. In some 

 species besides the differences in clothing, the middle tibiae of the 

 female have a distinct terminal spur. 



€law of hind tarsi not cleft 2. 



Claw of hind tarsi cleft near the tip 8. 



2. — Prothorax with front angles acute, sides oblique not much rounded 3. 



Prothorax with front angles less acute and sides much rounded 4. 



3. — Elytra brown, scales of prothorax small, not dense, of elytra hair-like; 

 hairs of prothorax long; middle tibiae 9 with a terminal spur. 



1. Sackenii n. sp. 



Black, densely clothed with rounded pale brown, yellow, or silvery scales, 



except on the head; prothorax and elytra frequently spotted; hairs 



of prothorax and elytra very short 6. dispar n. sp. 



4. — Prothorax clothed with long hair 5. 



Prothorax clothed thinly with short hair 6. 



5. — Body densely clothed with small scales; elytra and pygidium witli long 



hair; 7.2 — 9.5 mm.; Cala 2. callipyge i^ec. 



Body not squamose, but sparsely pilose, hairs of elytra and pygidium 



rather short 3. hirta n. sp. 



Body densely clothed with small scales; elytra and pygidium with short 



hair; 5.5 — 7 mm.; Cala.; Oregon 4. piibicollis 2^ec. 



6. — Epistoma flat, margined and truncate in front 7. 



Epistoma concave, subemarginate and strongly margined ; body clothed 

 with small elongate scales; prothorax with sides oblique, rounded. 



5. laticollis Lee. 



7. — Sexes dissimilar; prothorax wide, narrowed in front, sides subangulated 



and rounded; epistoma narrowly margined; 6.6 — 9.2 mm.: Atlantic 



region 7. trirasciala/Say. 



%. — Black, hairy with cinereous pubescence, sprinkled beneath with 



small silvery scales; tristis Mels. 

 $ . — Brown, very densely clothed with pale brown, and yellowish silvery 

 scales; middle tibiae with a large terminal spur; trifusciata Say. 



