12 MEMOIRS ON THE COLEOPTERA. 



short, compact and distinctly incrassate distally, the first two joints 

 subequal in length, the third elongate though a little shorter, the fourth 

 evidently, the outer joints strongly, transverse, the last subcylindric, 

 rapidly and ogivally pointed at tip, longer than the two preceding; 

 prothorax nearly one-half wider than long, much wider than the head, not 

 distinctly narrower than the elytral base though much narrower than the 

 apex of the latter, the apex broadly arcuate, the base still more rounded, 

 the sides feebly converging and moderately arcuate from the very obtuse 

 but evident basal angles to the apex; surface even and convex, excepting 

 a very small and rounded shallow ante-scutellar impression; elytra 

 large, rather rapidly broadening from base to apex, with almost straight 

 sides, not much shorter than wide and about one-half longer than the 

 prothorax; abdomen distinctly narrower than the elytra, parallel, nar- 

 rowing slightly at apex, about as shining as the anterior parts. Length 

 2.2 mm.; width 0.5 mm. California (Soda Spring, Anderson Valley, 

 Mendocino Co.). 



Distinct from larvalis in the more transverse head and slightly 

 larger and evidently more convex eyes, longer and less parallel 

 prothorax and finer, somewhat denser pubescence. 



Thiasophila Kr. 



The species of this genus are stout, very roughly sculptured and 

 subparallel, without the abruptly narrowed slender abdomen of 

 Ischnoglossaangiistiventrisandasperata, which I assigned erroneously 

 to Thiasophila (Ann. N. Y. Acad., VII, p. 303). The genus is 

 distinguished furthermore by a somewhat notable character affecting 

 the last antennal joint, unobservable either in Acrimea or Ischno- 

 glossa which follow, this joint being divided transversely by a 

 conspicuous suture just beyond the middle of the length; the 

 apparent suture is very distinct in the three American species but is 

 less distinct though visible and more apical in the European angu- 

 lata Er.; it conveys the impression of two connate joints and its 

 origin and significance are unknown. 1 The following are two spe- 

 cies in addition to laticollis Csy. (1. c., p. 302): 



Thiasophila blanchardi n. sp. Stout, parallel, rather convex, dark 

 red-brown, the elytra but slightly, the legs much, paler; surface strongly, 

 densely, asperately punctured and dull, the abdomen more minutely 

 but fully as closely punctate and less dull, the pubescence short, even, 

 subdecumbent, close, palish and distinct, not notably coarse; head trans- 

 verse, evenly convex, a little more than half as wide as the prothorax, 



1 A somewhat similar constriction in the last antennal joint is observable in Oxy- 

 poda gatosensis, Bernh., and fusiformis, Csy., but in these species the stricture is situ- 

 ated behind the middle of the joint. 



