Casey — Observations on the Staphylinidae. 345 



tures very fine, not very close-set, those of the elytra more visible, 

 asperulate aud close, those of the abdomen somewhat sparse though 

 closer than in valens; head nearly as long as wide, the eyes well devel- 

 oped; antennae attaining the middle of the elytra, joints five to ten 

 rather stout, subequal in width and rather strongly transverse, the 

 eleventh conoidal and rather longer than the two preceding; prothorax 

 strongly transverse, fully one-half wider than the head and nearly three- 

 fourths wider than long, the sides broadly arcuate, slightly converging 

 toward aptx, the basal angles obtuse and somewhat blunt, the surface 

 with a very feeble transverse impression before the scutellum; elytra 

 only very slightly wider than the prothorax but two-thirds longer, 

 somewhat narrowly impressed for some distance behind the scutellum; 

 abdomen much narrower than the elytra, parallel, the basal impressions 

 rather narrow and not very deep, the third tergite scarcely and the 

 fourth not at all impressed. Male with a minute rounded tubercle on 

 the fifth tergite at some distance from the apical margin. Length 2.7 

 mm.; width 0.83 mm. California (Licking Fork of the Mokelumne 

 River — 3,000 feet), — F. E. Blaisdell decolorata n. sp. 



The single type of valens is evidently a female. Decolo- 

 rata differs from californica Bern., in its paler coloration and 

 in its shorter and relatively broader prothorax, shorter elytra 

 and subparallel and not gradually incrassate antennae. 



Eucryptusa n. gen. 



This name is proposed for the species described by the 

 writer (Annals N. Y., VII., p. 352) under the name Silusa 

 nanula. It differs from Silusa in its smaller, unemarginate 

 mentum, less elongate labial palpi and stouter and shorter 

 paraglossae, as well as in its still shorter first four subequal 

 joints of the hind tarsi and in its system of sculpture. 



Pancota n. gen. 



This genus is also allied to Silusa, differing in the very 

 small size of the body, smaller and medially sinuate mentum 

 and less elongate palpi, but, more particularly, in the ex- 

 tremely slender and filiform tarsi, the posterior being some- 

 what more elongate but with the first four joints subequal as 

 usual in this group. The single known type is the fol- 

 lowing : — 



Body slender, moderately convex, shining, without minute ground sculp- 

 ture of any kind, pale brownish -flavate in color, the head and posterior 



