STAPHYLINID.E. 127 



the elytra feebly piceous, the legs pale; head but little wider than long, the 

 eyes at slightly less than their own length from the base, the tempora sub- 

 parallel and slightly less prominent as usual, the carinae entire; antennae 

 rather long, slender, only very feebly incrassate, the second and third joints 

 subequal, much elongated though shorter than the first, the outer joints 

 nearly as long as wide, the last much shorter than the two preceding; pro- 

 thorax less than one-half wider than long, parallel, evenly and moderately 

 rounded at the sides, much wider than the head and not evidently narrower 

 than the elytral base, not definitely impressed; elytra parallel, rather short, 

 the suture but little more than a fourth longer than the prothorax; abdomen 

 perfectly parallel, distinctly narrower than the elytra, the first three tergites 

 distinctly and somewhat broadly impressed transversely at base. Length 

 1.9 mm.; width 0.46 mm. Massachusetts, Blanchard. 



Very doubtfully a Datomicra and it might almost as well be placed 

 in Dimetrota; my three examples do not seem to include a male. 

 The middle coxae are narrowly separated, the metasternum rather 

 short but clearly angulate, the dividing ridge acute, becoming much 

 depressed toward the aciculate apex of the mesosternum. 



Micromota n. subgen. 



The body is here very small and slender, the hypomera horizontal 

 but so warped that a goodly part near the coxae is exposed from a 

 lateral viewpoint, and it would appear therefore to be much more 

 closely allied to Datomicra than to Microdota, where the homologous 

 European species, inguinula Er., is placed at present. The sterna 

 are not well exposed in my single type specimen, but the coxae seem 

 to be almost contiguous and the metasternal projection rather large 

 and angulate; the tarsi are short, the basal joint of the posterior 

 seemingly shorter than the second. The type is the following: 



Datomicra (Micromota) filiformis n. sp. Very slender, moderately or only 

 slightly convex, somewhat dull, the fine asperate punctures everywhere 

 dense, even on the abdomen, where the fourth and fifth tergites are blackish 

 and longer than the first three, which are dark rufo-piceous, the remainder 

 piceous-black, the elytra barely at all paler, the legs pale; head about as 

 long as w r ide, the eyes at their own length from the base, about as prominent 

 as the parallel and feebly arcuate tempora, the carinae fine, not quite entire; 

 antennae not very short, gradually and moderately incrassate, the first joint 

 longer than the second or third, the latter the shorter and more obconic, the 

 outer joints rather strongly transverse, the last pointed, as long as the two 

 preceding and somewhat thicker; prothorax rather short and transverse, 

 evidently wider than the head and a little narrower than the base of the elytra, 

 widest before the middle but with broadly and subevenly rounded sides, 

 the median line very finely impressed; elytra moderately short, the suture 

 fully a third longer than the prothorax; abdomen slender, parallel, much 



