234 MEMOIRS ON THE COLEOPTERA 



The differences are easily noted in series and there may be some 

 appreciable sexual differences, but the abdominal apex is greatly 

 retracted in all my specimens and the sexual modifications are com- 

 paratively slight in Gymnusa. 



Tribe DEINOPSINI. 

 Deinopsis Matth. 



In size of the body Deinopsis is intermediate between Gymnusa 

 and Myllcena and the stature is notably uniform among the various 

 species. The sexual characters are more conspicuous than in either 

 of the other genera, the sixth tergite of the male having a very 

 small narrow apical notch between the rounded apical lobes, that 

 of the female being very deeply and acutely incised at apex. The 

 tarsi are very different, being small and slender, proportionally 

 smaller in fact than in any other genus of either this subfamily 

 or of the Aleocharinse that can now be called to mind, and they afford 

 another exception in either of these subfamilies in being 3-jointed 

 throughout. The species resemble each other a good deal super- 

 ficially, as in the case of the other two genera of the Myllseninae, 

 but can be distinguished readily by differences in the male sexual 

 characters. The abdomen is moderately tapering from the base 

 in all except a species which I took at Vicksburg, Mississippi, 

 in which it is strongly tapering as in most of the genus Myllcena, 

 and I therefore surmise that this is the myllanoides, of Kraatz, 

 described from Louisiana. Americana Kr., also described from 

 Louisiana, seems to be represented in my collection by two ex- 

 amples taken in Virginia and is described below. 



Deinopsis harringtoni n. sp. Moderately stout, somewhat depressed, 

 rather dull in lustre, the minute punctures close-set, asperate on the 

 elytra, dark piceous-brown, blacker posteriorly, the very fine pubescence 

 ashy; head convex, wider than long, laterally prominent at the eyes, two- 

 thirds as wide as the prothorax, the antennae palish, slender; prothorax 

 short, almost twice as wide as long, the truncate apex three-fourths as 

 wide as the base, which is broadly arcuate, becoming feebly sinuate 

 laterally, the basal angles distinct, the sides rounded; elytra equal in 

 width to the prothorax, the suture equal in length to the latter, parallel 

 and feebly arcuate at the sides, the apex sinuate medially, each deeply 

 sinuate laterally; abdomen nearly as wide as the elytra, the fifth tergite 

 fully two-thirds as wide as the base, extremely minutely, densely punc- 

 tulate and pubescent as usual. Length 2.65 mm.; width 0.9 mm. Can- 

 ada (Ottawa), W. H. Harrington. 



