junei 9 oo.] Casey: On North American Coleoptera. 77 



Cryptophagin.e. 



The body in this subfamily is generally larger, more oblong, less 

 convex and more pubescent than in the Atomariinas, possessing at the 

 same time much more variety in tarsal structure and in the form of the 

 anterior coxal cavities. These variations are important, being always 

 accompanied by a peculiarity of general structure and habitus, and 

 necessitate the erection of a considerable number of distinct tribes as 

 follows : — 



Trochanters moderate in size, very obliquely attached at the side of the femoral base, 

 the latter attaining the coxae ; anterior coxal cavities completely and broadly 

 closed behind ; first ventral segment very much shorter than the next two com- 

 bined, and having two fine straight cariniform lines diverging from the inner 

 margin of the coxal cavities ; antennal grooves before the eyes narrow and deep, 

 the buccal processes narrow ; front short and without trace of clypeal sutures ; 

 eyes basal and coarsely faceted ; body subdepressed, the pronotum generally with 

 fine longitudinal raised lines at least visible toward the sides ; abdominal sutures 

 fine, broadly arcuate ; tarsi pentamerous in both sexes, the fourth joint small, the 

 third strongly and the second more feebly, lobed beneath Biphyllini. 



Trochanters very short but less obliquely joined to the femoral base throughout the 

 width of the latter ; anterior coxal cavities narrowly and partially closed behind 

 by an inward projection of the side pieces of the presternum ; tarsi stout, pentam- 

 erous in both sexes, densely clothed beneath with coarse hairs, the fourth joint 

 small ; eyes basal or subbasal and coarsely faceted ; front prolonged, more or less 

 prominently convex above the antennae and with a short oblique clypeal suture at 

 each side ; middle coxae narrowly separated ; pronotum never lineate, the basal 

 foveae minute or subobsolete ; elytra with confused punctuation but becoming regu- 

 larly seriato-punctate in Leucohimatium ; basal segment of the abdomen short or 

 moderate, never lineate, the sutures nearly straight ; antennal grooves before the 

 eyes narrow and deep in Setaria, obsolete in Haplolophus and Leucohimatium ; 

 antennal club 2-jointed in Setaria *Setariini. 



Trochanters elongate, bearing the femora obliquely attached distally ; middle coxae 

 smaller and less narrowly separated ; front short before the antennae, without 

 trace of clypeal sutures ; antennal grooves obsolete ; antennal club always loosely 

 3-jointed 2 



2 — Anterior coxal cavities completely, though not very broadly, closed behind ; first 

 ventral segment but little longer than the second and with two straight diverging 

 cariniform lines as in Biphyllini, the tarsi pentamerous in both sexes, with the 

 fourth joint small, the joints toward base having simple brushes of hair beneath ; 

 first joint of the posterior as long as the next two combined in Cryptophilns ; eyes 

 basal and coarsely faceted ; pronotal foveae very minute *Cryptophilini. 



Anterior coxal cavities broadly and completely open behind ; basal segment of the 

 abdomen variable in length 3 



3 — Tarsi pentamerous in both sexes, with the fourth joint small, the third joint 

 strongly, and the second less strongly or obsoletely, lobed beneath, the lobes 



