Casey — Observations on the Staphylinidae. 217 



denser than usual but feeble, the median lioe broadly impunctate; ver- 

 tex with a deep rounded impression; antennae moderately incrassate 

 distally; prothorax somewhat wider than the head, about a fourth 

 wider than long, the sides obtusely angulate anteriorly, thence rather 

 strongly converging and broadly sinuate to the base, the surface very 

 minutely, sparsely punctulatCj narrowly and very obsoletely impressed 

 on the median line behind the centre, the transverse impression large 

 and conspicuous, deeply bifoveate; elytra transverse, about two-thirds 

 wider and a third longer than the prothorax, very sparsely punctu- 

 late and convex; abdomen, at the middle, scarcely as wide as the elytra, 

 at base and apex very much narrower; male not at hand. Length 



3.2 mm; width 0.78 mm. Arizona niajascala n. sp. 



Form still stouter, piceous-black throughout, the legs and antennae testa- 

 ceous; punctures very minute and sparse on the head and throughout 

 as usual, those of the abdomen asperulate; pubescence very sparse 

 but rather coarse and pale ashy in color; head somewhat wider than 

 long, the sides behind the prominent eyes parallel for a short distance, 

 then strongly rounded to the neck, the rounded impression of the ver- 

 tex smaller and feebler than in the preceding species; antennae 

 extending to apical third of the elytra, slender, only moderately in- 

 crassate di.stally, the subapical joints perceptibly shorter than wide; 

 prothorax scarcely wider than the htad, about a fifth wider than long, 

 strongly convex, the sides broadly rounded anteriorly, thence moder- 

 ately converging and straight to the base, the basal impression ob- 

 scurely and irregularly bi-impressed, the median line impressed for a 

 short distance anteriorly from the transverse impression; elytra 

 strongly transverse, two-thirds wider and two-fifths longer than the 

 prothorax, the humeri very widely exposed, the suture impressed 

 behind the scutellum; abdomen less strongly elliptical than in majws- 

 cula, in the middle much narrower than the elytra; female not known. 

 Length 2.75 mm.; width 0.75 mm. California (Los Angeles Co.), — 



H. C. Fall sparsella n. sp. 



3 — Prothorax distinctly transverse; body stout in form throughout 4 



Prothorax barely perceptibly wider than long; form somewhat less stout.. 8 

 4 — Punctures of the head larger, more approximate and much more con- 

 spicuous though impressed and not very deep. Body black, with a 

 slight piceous tinge throughout, the legs and antennae very slender, 

 pale piceo-testaceous; vestiture pale in color; head wider than long, 

 impunctate along the middle, the vertex with a large rounded impres- 

 sion; eyes small; antennae extending to the middle of the elytra, 

 rather strongly incrassate distally, the ninth joint fully as long as 

 wide, the tenth nearly so ; prothorax just visibly wider than the head, 

 nearly a fourth wider than long, the sides anteriorly narrowly rounded 

 and prominent, thence rather strongly convergent and broadly sinuate 

 to the base, the surface minutely and almost imperceptibly punctulate 

 as usual, strongly impressed along the middle from apical third, the 

 transverse impression small and feeble ; elytra nearly as in sparsella, 

 the humeri equally widely exposed, the punctulation almost invisible, 

 the suture narrowly and deeply impressed behind the scutellum; 

 abdomen broad though distinctly narrower than the elytra, the sides 



