STAPHYLINID/E. 129 



Datomicra (Hilarina) inanis n. sp. Similar in general form and size but 

 paler and less shining, the punctures fine but very much more close-set, the 

 abdominal sculpture nearly similar; color testaceous, the elytra rather darker 

 but pale toward the humeri, the head piceous, the legs pale, the abdomen 

 blackish, pale basally; head nearly similar but with smaller eyes at rather 

 more than their own length from the base, the carinse longer, generally almost 

 entire; antennae similarly short and thick, the outer joints strongly trans- 

 verse, the ninth and tenth mutually similar, the last a little more pointed 

 and longer than the two preceding, the basal joints nearly as in particitla but 

 with the third joint a little shorter; prothorax nearly similar in general form 

 and relationships but widest at the middle, the parallel sides similarly 

 distinctly rounded, still more nearly as wide as the elytra and unimpressed; 

 elytra smaller and a little shorter, the suture rather more than a fourth 

 longer than the prothorax; abdomen rather long, parallel, but little narrower 

 than the elytra. Length i.i mm.; width 0.2 mm. Pennsylvania (Phila- 

 delphia). 



The four specimens before me exhibit no positive sign of sexual 

 identity. 



Oligomia n. subgen. 



In this subgenus the hypomera are as in Datomicra and the 

 middle coxae are rather approximate, with the finely aciculate apex 

 of the mesosternal process extending rather beyond their middle 

 and far distant from the metasternum, which is transverse and 

 only very feebly arcuate medially, not at all advancing; the hind 

 tarsi are rather short but slender and filiform, the first joint shorter 

 than two to four which are equal. The species are very small and 

 male sexual characters are not observable. 



Datomicra (Oligomia) scintilla n. sp. Moderately stout and convex, fusoid, 

 only slightly shining, the reticulation fine, very coarse and irregular on the 

 abdomen, the punctures fine but strongly asperate, close-set, somewhat 

 sparse and inconspicuous on the much more shining abdomen; color rather 

 dark piceous, the elytra but slightly paler, dark brown, the legs piceo-flavate; 

 head wider than long, convex, the eyes well developed, rather convex, at 

 their own length from the base, the tempora swollen, convex and more 

 prominent than the eyes, the carinae feeble and very far from entire; antennae 

 blackish, only moderately short but slender, only feebly incrassate, the 

 second and third joints both elongate, the latter only slightly the shorter, 

 the former but slightly shorter than the first, the fourth fully as long as wide, 

 the outer joints but very moderately transverse, the last fully as long as 

 the two preceding; prothorax transverse, parallel and strongly rounded at 

 the sides, very much wider than the head and as wide as the elytral base, 

 the median line feebly impressed, joining a feeble basal impression; elytra 

 moderately transverse, the apices broadly but evidently sinuate laterally, 

 the suture fully a third longer than the prothorax; abdomen much narrower 

 than the elytra, tapering almost throughout the length, the fifth tergite 

 T. L. Casey, Mem. Col. I, Sept. 1910. 



