Casey — Observations on the Staphylinidae. 347 



three-fourths wider than long, the sides parallel and evenly arcuate, 

 the basal angles obtuse and slightly rounded, the surface extremely 

 faintly, transversely impressed before the scutellum; elytra well devel- 

 oped, equal in width to the prothorax and nearly one-half longer, 

 parallel, with a small sutural depression behind the scutellum; abdo- 

 men distinctly narrower than the elytra, parallel, shining, sparsely 

 punctured toward tip, the first three tergites narrowly and equally im- 

 pressed at base. Length 1.7 mm.; width 0.42 mm. California (Pasa- 

 dena), — A. Fenyes pagadenae n. Bp. 



The male has some irreguhirly scattered granules toward 

 apex of the fifth aud sixth tergites throughout the width, 

 the sixth truncate, with about eight rather large serrulations 

 thoughout the width, the median interval rather wider than the 

 others. 



Ulitusa n. gen. 



This genus resembles Silusa but differs in the minute size 

 and in the truncate mentum, not prolonged anteriorly at the 

 sides and laterally impressed on the surface ; the labial palpi 

 are long but much stouter, three-jointed, the infra-lateral 

 carinae of the head strong and entire, the middle coxae and 

 adjacent parts as in the preceding genus, but with the acute 

 mesosternal process freer; the hind tarsi are moderately 

 stout, nearly three-fourths as long as the tibiae, with the first 

 four joints short and subequal ; the eyes are rather small, 

 prominent, the sides of the head behind them somewhat 

 strongly convergent and evenly arcuate to the neck. The 

 sculpture is coarse and conspicuous. We know at present two 

 species as follows : — 



Body rather slender, moderately convex, the surface without minute ground 

 sculpture, except a feeble reticulation toward the abdominal apex, 

 shining, coarsely and closely but not densely punctate throughout, 

 except on the abdomen, which is finely and sparsely punctate; 

 pubescence inconspicuous; color dark testaceous, with the elytra 

 blackish, paler at the humeri and also along the apical margin, the 

 abdomen with a blackish or flceous subapical cloud, the legs pale, the 

 antennae black, pale at apex and gradually paler toward base; head 

 nearly as long as wide, strongly, closely punctate, the antennae stout, 

 gradually incrassate distally, the second and third joints elongate, the 

 former somewhat the longer, the subapical joints transverse, the pale 

 eleventh joint stout and conoidal; prothorax short, a third wider than 

 the head and fully two-thirds wider than long, widest before the mid- 



