Casey — Observations on the Staphylinidae. 307 



not quite extending to the tips of tiie elytra, gradually and rather 

 strongly Incrassate distally, the tenth joint not quite as long as wide; 

 prothorai distinctly wider than the head, fully as long as wide, widest 

 at anterior two-flfths, where the sides are rather strongly arcuate, thence 

 rounding to the apex and feebly converging and somewhat sinuate 

 toward base; surface narrowly and rery feebly impressed along the 

 median line throughout, with a somewhat more pronounced impression 

 before the scutellum; elytra two-flfths wider and a third longer than 

 the prothorax, the crowded punctures less minute and more evident 

 than on the latter; abdomen parallel, distinctly narrower than the 

 elytra, the first three tergites strongly and rather narrowly impressed 

 at base; mesosternal process extending, somewhat more posteriorly 

 than in ame^'icana. Length 3.4 mm. ; width 0.65 mm. North Carolina 

 (Asheviile) and Pennsylvania (Philadelphia) faliginosa n. sp. 



The first of the above species is closely allied to the Euro- 

 pean ruhicunda Er., but has a broader neck, the latter having 

 the neck about two-thirds as wide as the head, while in 

 americana \t is about three-fourths as wide; there are also 

 several other minor differences. The second species more 

 nearly resembles longitai'sis, but is more slender and with 

 relatively much smaller elytra. 



Pachycerota n. gen. 



It is probable that this genus, though very isolated, will 

 prove to be more closely related to Ilyobates than to any 

 other at present described. The body is rather stout, moder- 

 ately convex, densely sculptured, the mesosternal process 

 moderately narrow, flat, extending to apical third or fourth 

 of the coxae, with its arcuato-truncate apex slightly free and 

 not quite attaining the narrowly rounded tip of the elongate 

 metasternal projection. The mentum is transverse, coria- 

 ceous at tip, the processes of the ligula long, slender and 

 contiguous, the palpi moderate and setose, the eyes moder- 

 ately developed, anterior and somewhat finely faceted, the 

 antennae short, compact and very stout, the neck rather 

 abruptly and deeply constricted and about two-thirds as wide 

 as the head and the first three abdominal segments somewhat 

 broadly and subequally impressed at base. The legs are 

 moderate in length, the tarsi somewhat short, the posterior 

 slender and two-thirds as long as the tibiae, with the basal 



