BYRRHID.'E 35 



Form briefly oval, smaller in size, convex, black throughout, fusco- 

 squamulate, not maculate, interspersed with longer erect black 

 claviform bristles; prothorax feebly compressed anteriorly at the 

 sides; elytra subequally striate, the sutural stria somewhat deeper 

 posteriorly. Length 2.0 mm.: width 1.5 mm. Alaska (interior of 

 the Kenai Peninsula a single specimen). [Syncalypta setulosa 

 Mann., Bull. Mosc., 1853, p. 216] setulosa Mann. 



4 Ovate, convex, more pointed behind, the sides of the elytra parallel 

 from the base to beyond the middle, black, densely clothed with 

 brownish-gray scales and but slightly mottled; bristles rather long, 

 clavate as usual. Length 2.5 mm. Colorado (Garland). A single 

 specimen. [Syncalypta grisea Lee., Bull. U. S. Geol. and Geog. 

 Surv., 1879, V, p. 514] grisea Lee. 



Oblong-oval, black, the surface with an incrustation of dark foreign 

 matter but shining where exposed, the bristles claviform, numerous, 

 moderate in length, fuscous and somewhat unevenly serial in ar- 

 rangement; prothorax relatively unusually short, with moderately 

 large and not very dense punctures, the converging sides rather 

 strongly arcuate; elytra fully a fourth longer than wide and much 

 more than three times as long as the prothorax, the sides gradually 

 converging and rounded behind to the notably acute apex, the striae 

 visible and sensibly impressed throughout, the dark crust concealing 

 any possible maculation of condensed scales, the surface where 

 exposed scarcely at all punctured, smooth and shining; under sur- 

 face moderately shining and with rather small, somewhat close-set, 

 deep punctures. Length 2.5 mm.; width 1.5 mm. Washington 

 State. A single specimen brevicollis n. sp. 



Melsheimer gave a short and very insufficient diagnosis (Proc. 

 Ac. Phila., 1844, p. 117) of a "Syncalypta hispidus" (!) as casta- 

 neous, fusco-hispid, the antennse and feet red-brown; head blackish, 

 somewhat wrinkled, very finely and distantly punctured; prothorax 

 punctured like the head; elytra darker than the prothorax, glossy, 

 with very fine vicinal punctures; under surface glabrous. Length 

 3 mm. Pennsylvania. This is not alluded to by LeConte in his 

 synopsis of the Byrrhidse (1. c., 1854, p. 113) and I do not know 

 whether or not it has ever been identified; it is certainly not a 

 member of the present genus. The lack of agreement of the specific 

 word in gender would lead one to suppose that the author had origin- 

 ally assigned it to some other genus and had failed to change the 



gender ending. 



Tribe EXOMINI. 



This tribe seems to be necessitated by a minute species, repre- 

 senting a local development peculiar to the northwestern coastal 

 region of North America; its aberrant features concern principally 



