9O MEMOIRS ON THE COLEOPTERA. 



angulate metasternal projection by a moderately depressed and rather 

 narrowly convex ridge. Length 2.5 mm.; width 0.7 mm. Pennsylvania 

 (Buena Vista Spring, Franklin Co.). 



The four examples before me, which I took in August last, appear 

 to be females; the antennae when contracted are but little longer 

 than the head and prothorax. 



The following species is distinguishable by its large prothorax, 

 heavy antennae and unusually short elytra: 



Atheta postulans n. sp. Rather stout, subparallel and convex, black, 

 the elytra dark red-brown to piceous, the legs pale; punctures fine, well 

 separated, asperulate, especially on the elytra, fine and remote on the 

 abdomen; pubescence rather coarse, unusually long, erect or nearly so 

 and bristling; micro-reticulation rather large but not strong, finer and 

 subtransverse on the abdomen; head nearly four-fifths as wide as the 

 prothorax, slightly transverse, parallel, the eyes at more than their own 

 length from the base and not very convex, the tempora straight and par- 

 allel, then rounded, not less prominent than the eyes, the caring fine 

 and not entire; antenna; black, paler basally, notably long but stout and 

 gradually strongly incrassate, the second joint longer and more cylindric 

 than the third, fourth distinctly, the outer joints fully one-half, wider 

 than long, the last oval, conically pointed, as long as the two preceding; 

 prothorax two-fifths wider than long, parallel, with moderately and sub- 

 evenly arcuate sides and rounded base, the surface unusually convex, 

 with a feeble transverse ante-scutellar impression; elytra strongly trans- 

 verse, at base but vary little, at apex more distinctly, wider, the suture not 

 longer, than the prothorax, the apices transverse externally; abdomen 

 broad, parallel, with very feebly arcuate sides, about as wide as the 

 elytra, feebly narrowing posteriorly, the fourth and fifth tergites equal; 

 margins thin; middle coxae slightly separated, the acute mesosternum 

 moderately distant from the angulate metasternum; basal joint of the 

 hind tarsi shorter than the second. Length 2.25 mm.; width 0.65 mm. 

 British Columbia (Metlakatla), Keen. 



Two of the examples before me have the sixth segment much 

 retracted, but with the ventral plate evidently somewhat narrow 

 and subparabolic; the third is a female, with the sixth ventral 

 broader and circularly rounded. 



The following is allied to postulans but has longer elytra: 



Atheta apposita n. sp. Rather stout, strongly shining, the sculpture 

 nearly as in the preceding but with the punctures still more remote, 

 very fine and sparse on the pronotum; color deep black, the elytra very 

 dark rufo-piceous, the legs blackish, paler distally; pubescence not so 

 long or conspicuous as in the preceding; head nearly as long as wide, 

 two-thirds to three-fourths as wide as the prothorax, parallel, the eyes 

 rather large but not notably prominent, the ternpora forming a broad 



