88 Journal New York Entomological Society. [Vol. vi. 



the process very narrow and sublamellar. The male characters are 

 always pronounced and generally affect both the clypeus and thoracic 

 apex, but these characters greatly diminish in degree in the smaller and 

 less developed males, these depauperate individuals not differing much 

 from the females in either the present genus or Ceracis. In both of 

 these genera the male also has a small deep pubescent fovea, not at the 

 centre, but near the posterior margin, of the first ventral segment. The 

 characters of the following table are taken throughout from what appear 

 to be fully developed males only: — 



Male with the clypeal margin broadly and stroDgly reflexed in a trapezoidal process, the 

 thoracic process bidentate 2 



Male with a long slender erect clypeal process, the thoracic apex simple and rounded; 

 species very small 11 



2 — Elytra without trace of impressed lines 3 



Elytra with very feebly and unevenly impressed lines, the punctures feebly sub- 

 serial in arrangement IO 



3 — Male with the thoracic processes longer, narrower and more approximate ; punc- 

 tuation feeble, the elytral punctures always confused in arrangement. Atlantic 

 and Gulf regions 4 



Male with the thoracic processes shorter, more widely separated and more lamellarly 

 triangular ; punctuation stronger, the elytral punctures generally confused but 

 occasionally very feebly subserial. Pacific Coast regions 6 



4— Apex of the pronotum rather feebly impressed behind the processes 5 



Apex of the pronotum strongly, transversely impressed behind the processes. Mod- 

 erately slender, polished, piceo rufous in color ; head well developed, concave, 

 tie clypeal process large and well developed, with the apex feebly sinuate at 

 the middle ; prothorax slightly wider than long, the sides parallel and nearly 

 straight, the angles all rounded ; processes long, slender and distinctly diverging 

 as usual ; base and sides finely margined ; punctures fine and sparse ; elytra less 

 than one-half lorjger than wide, as wide as the prothorax and two thirds longer, 

 the surface very feebly subrugulose, sparsely and very minutely punctate, the 

 punctures much more minute than those of the pronotum ; apex evenly rounded. 

 Length 1. 2-1. 5 mm.; width 0.45-0.6 mm. Texas (Columbus) and Louisiana. 



piceum, sp. nov. 



5 — Elytra fully one-half longer than the piothorax, slender, cylindric oval, black, 

 rather strongly shining ; legs, mouth pans and antennas pale ; punctures fine and 

 rather sparse ; thoracic processes rather short. Canada to Pennsylvania ( mellj i 

 Mell. , unicolor Csy. ) thoracicorne Zieg. 



Elytra very short and quite strongly cunei r orm, very much less than one-half longer 

 than the prothorax. Rather stout, the head polished and concave, the eyes 

 small ; clypeal process well developed but with the sinuate sides rather rapidly 

 converging, the apex a little less than half as wide as the head, feebly sinuato- 

 truncate ; prothorax large, not quite as long as wide, the sides parallel and 

 broadly arcuate, the corneous processes moderately long and rather stout ; 

 punctures fine but distinct, only moderately sparse ; elytra at base as wide as the 



