Casey — Observations on the Staphylinidae. 159 



rather small, only moderately stout, polished, black, the elytra blackiah- 

 piceous, not distinctly nubilate with paler at any part, the legs pale 

 piceo-rufous, the antennae black, piceous toward base; head three- 

 fifths as wide as the prothorax, the antennae short, rapidly and 

 strongly incrassate distally, scarcely one-half longer than the 

 prothorax, the tenth joint fully twice as wide as long; prothorax 

 about one-half wider than long, the punctures toward the sides 

 somewhat feebly impressed and inconspicuous, the two large sublateral 

 punctures before the middle distinct; elytra slightly wider than the 

 prothorax, the sides evidently longer than the sides of the latter, the 

 suture nearly three-fourths as long as the median line ; abdomen sub- 

 equal in width to the elytra, parallel; metasternal process unusually 

 narrowly rounded. Length 3.0-3.9 ram.; width 0.72-0.95 mm. New 

 Mexico (Las Vegas) recta n. sp. 



Basal joint of the hind tarsi fully as long as the next two combined; meta- 

 sternal process much more broadly rounded. Body stout, parallel, 

 polished, black, the elytra scarcely at all paler, each with a large, clearly 

 defined and anteriorly rounded spot at apex and near the suture of flavo- 

 testaceous; legs piceo-rufous, the antennae black, but little paler at 

 base; head rather small, not quite half as wide as the prothorax, 

 sparsely but somewhat strongly punctured, the antennae longer and less 

 incrassate than usual, almost as long as the head and prothorax, the 

 tenth joint evidently less than twice as wide as long; prothorax well 

 developed, three -fifths wider than long, distinctly, rather closely but 

 somewhat unevenly punctured toward the sides, the sublateral punc- 

 ture rather before the middle as usual; elytra at the sides about as long 

 as the sides of the prothorax, the suture two-thirds as long as the 

 median line; abdomen as wide as the elytra, closely and strongly punc- 

 tured throughout, gradually more coarsely in the impressions of the 

 the basal tergites. Length 3. 8-6. 4mm.; width 1.05-1.68 mm. Entire 

 northern parts of the continent, from the Atlantic to the Pacific, de- 

 scending on the Pacific coast as far as Monterey, and, along the high- 

 lands of the Rocky Mountains to Guanajuato, Mexico. bimacalata Grav. 



19 — Form moderately stout, parallel, highly polished, deep black, the 

 elytra scarcely at all paler but each with a large rounded fiavate spot 

 near the suture, beginning slightly before the middle and expanding to 

 the apical margin, along which it extends narrowly to the outer mar- 

 gin; legs and basal parts of the antennae piceo-rufous, the remainder 

 of the latter blackish; head fully half as wide as the prothorax, having 

 a few fine and remotely scattered punctures; antennae one-half 

 longer than the head, moderately incrassate, the third and fourth 

 joints elongate and subequal, the tenth rather less than twice as wide 

 as long; prothorax large, one-half wider than long, the strongly 

 converging sides feebly and evenly arcuate, the base strongly rounded 

 throughout; elytra at the sides as long as the sides of the prothorax, 

 the suture two-thirds as long as the median line, the punctures fine, 

 evenly and sparsely distributed, feebly asperulate; abdomen as wide as 

 the elytra, parallel, fiuely, rather sparsely punctulate, the subbasal im- 

 pressions coarsely but not densely so; mesosternal process unusually 

 wide; basal joint of the hind tarsi as long as the next two combined. 



