12G Journal New York Entomological Society. [Vol. vin. 



species, as its length is given " i line," and it is said to be extremely 

 rare. 



Tisactia, gen. nov. 

 Although bearing a certain general resemblance to Atomaria, this 

 genus is really profoundly different in several structural characters, 

 and it may be readily recognized by the marginal bead at the base of 

 the elytra ; it also differs in having the pronotum perfectly even and 

 unimpressed at base, in its widely separated frontal antennae and in 

 its broad prosternal process, margined at each side by an acute carini- 

 form edge. The head is rather deeply inserted, the eyes well de- 

 veloped and rather coarsely faceted but not very convex, and the cly- 

 peus, which is slightly prolonged and expanded before the antenna;, 

 is separated from the front by an impressed straight suture extending 

 between theantennal foveae. The antenna; are nearly as in Atomaria, 

 the first joint relatively still smaller but subsimilar in form, and the 

 club parallel, loosely 3-jointed and well developed. The legs and 

 tarsi are slender, the latter filiform, moderately short and pentamerous, 

 the mesosternum moderately wide and unimpressed between the coxae, 

 and the deep -set anterior coxa; are oblique and much more transverse 

 than in Atomaria approaching Ephistemus in this respect, the cavities 

 sharply angulate externally. The scutellum is moderate in size and 

 transversely oval. The single species is the following : — 



Body oblong-oval, very convex, black or blackish, the legs and antennce paler, testa- 

 ceous, the club of the latter blackish, apparently glabrous, each puncture, how- 

 ever, with an excessively minute hair ; punctures throughout very fine and sparse, 

 not denser on the prothorax, which is moderately transverse, very convex and 

 deep on the flanks, the base distinctly wider than the apex, transverse, finely 

 beaded and feebly lobed at the scutellum ; sides broadly arcuate from above, the 

 lateral edges finely but acutely reflexo-beaded and nearly straight from a sublat- 

 eral viewpoint ; elytra slightly longer than wide, ogival at tip, widest and dis- 

 tinctly wider than the prothorax slightly before the middle, the base equal to the 

 base of the latter, the humeri not at all exposed at base, the sides arcuate, the 

 suture not margined, minutely dehiscent at apex as usual. Length 0.9 mm.; 

 width 0.55 mm. Indiana subglabra, sp. nov. 



Two specimens are before me, one much damaged. 



Ephistf.mini. 



This is one of the more highly specialized tribes of the family, 

 composed of very minute, broadly oval and convex glabrous species, 

 feebly represented in the nearctic, but moderately abundant in the 



