Coleopterological Notices, V. 355 



dense, fine, erect, not very conspicuous. Head narrow, elongate, the sides 

 parallel and feebly arcuate ; eyes small, rather coarsely faceted, convex, at 

 twice their length from the base ; antennae short, one-third longer than the 

 head, moderately incrassate, the second joint thick, nearly as wide as the 

 first, much thicker than the third, but slightly longer than wide, third 

 strongly obconical, slightly longer than wide, four to ten transverse, gradu- 

 ally wider, eleventh small, conoidal. not as long as the preceding two. Pro- 

 thorax but very slightly wider than the head and about as long, fully as long 

 as wide ; sides subparallel, broadly feebly and evenly arcuate, but slightly 

 more convergent toward base than apex ; disk evenly convex, widest slightly 

 before the middle ; apex broadly arcuate and just visibly wider than the base. 

 Elytra short, fully twice as wide as long, one-half as long as the prothorax 

 and nearly one-fifth wider ; sides feebly convergent from apex to base and 

 feebly, evenly arcuate. Abdomen thick, parallel, fully as wide as the elytra, 

 nearly twice as long as the anterior parts ; sides nearly straight ; border 

 thick; surface transversely and feebly convex. Tibiae moderate in length; 

 posterior tarsi barely one-half as long as the tibiae, the first four joints very 

 short, equal ; ungues long, slender, evenly and rather strongly arcuate. 

 Length 2.7 mm. ; width 0.7 mm. 



Alaska (mainland opposite Ft. Wrangel). Mr. H. F. Wickham. 



The single specimen serving as the type is apparently a female. 

 The other species is nearly similar, but differs in the following 

 characters : — 



D. insolita n. sp. — Black throughout and very dull, body narrower. 

 Prothorax wider than the head, not quite as long as wide, wider just before the 

 middle where the sides are broadly arcuate to the apex, distinctly convergent 

 but not sinuate to the base, which is noticeably narrower than the apex. 

 Elytra barely twice as wide as long, equal in width to the prothorax and 

 rather more than one-half as long. Abdomen long, at base as wide as the 

 elytra; sides straight, gradually .divergent behind, so that the apex of the 

 fourth segment is fully one-third wider than the elytra; border thick. Length 

 (extended) 2.8 mm. ; width 0.6 mm. 



Queen Charlotte Ivsland. 



The male has the sixth ventral plate prolonged in the middle in 

 a rounded triangular lobe. In both of these species the last three 

 joints of the antennae form a kind of club, the ninth and tenth being 

 longer as well as wider than those preceding them. 



The label states that the type specimen was taken near low water 

 on the beach. 



AMBLOPUSA n. gen. 



Body extremely slender, parallel, linear, thick and slightly con- 

 vex. Head oval, parallel, the sides broadly arcuate ; labrum mode- 



