STAPHYLINID^. 73 



with thick margins, dull, the tergites increasing gradually in length from the 

 base, the first three strongly, transversely impressed at base, the truncate 

 fifth with rounded angles, the sixth small, the narrowed apex feebly sinuate 

 medially; mesosternal process extending to apical fourth of the coxae, gradu- 

 ally finely pointed and very free at apex, moderately distant from the ob- 

 tusely angulate metasternum, the intermediate ridge broadly convex, the 

 coxae separated as in Atheta; femora stout; basal joint of the hind tarsi 

 much longer than the second. Length 2.4 mm.; width 0.65 mm. Cali- 

 fornia (Monterey). 



The minute dense sculpture of the abdomen resembles that so 

 common in Oxypoda, and imparts to the species of this genus a 

 peculiar and distinctive appearance. I have been unable to discover 

 any sexual modifications of the abdomen, either in this or the other 

 species. 



Paradilacra willametta n. sp. General coloration, sculpture and dull 

 lustre as in persola but more slender and rather more depressed; head more 

 transverse, the eyes less convex, at about their own length from the base, 

 the tempora continuing their curvature and then very broadly rounding 

 to the base, the antennae more slender, almost filiform, the joints longer 

 than wide, the tenth fully as long as wide, the last more pointed but shorter 

 than the two preceding, the second and third much elongated, the latter much 

 less evidently the shorter than in persola; prothorax shorter, more transverse, 

 otherwise similar but not impressed at base, the median line very finely 

 and feebly impressed ; elytra and abdomen nearly similar, the former much 

 less transverse, the suture much longer than the prothorax, the basal abdom- 

 inal segments less impressed at base; mesosternal process less finely aciculate 

 at tip, the legs and tarsi nearly similar. Length 2.4 mm.; width 0.58 mm. 

 Oregon (Portland). 



Readily distinguishable from the preceding by the very slender 

 and subfiliform antennae, form of the head and prothorax, longer 

 elytra and other characters. 



Paradilacra uintana n. sp. Slender, very moderately convex, dull, almost 

 black throughout, the legs rufo-piceous to paler distally; head nearly as in 

 the preceding, the antennae very slender but not quite so filiform, the joints 

 elongate, eight to ten from as long as wide to nearly so, the last almost as 

 long as the two preceding, the second and third much elongated, the latter 

 slightly the shorter; prothorax nearly as in willametta but less transverse 

 and with the sides subparallel and moderately but almost evenly rounded, 

 much wider than the head and only slightly narrower than the elytra, very 

 finely, feebly impressed along the median line; elytra but very little wider 

 than long, much longer than the prothorax, the suture only faintly impressed 

 very near the scutellum; abdomen similar; sterna nearly as in persola but 

 with the metasternal projection more elongate and more acutely angulate; 

 three basal joints of the hind tarsi decreasing uniformly and rapidly in length. 

 Length 2.1-2.25 mm.; width 0.53 mm. Utah (Milford) and Nevada 

 (Elko), YVickham. 



