STAPHYLINID/E. 55 



differing greatly from the usual conformation in not being free, 

 separated from the rather small but anteriorly projecting meta- 

 sternum, with its apex narrowly rounded, by a moderate undepressed 

 interval, in which the longitudinal ridge is narrowly convex; hind 

 tarsi slender, the basal joint much longer than the second. This 

 will probably prove to be a true genus. 



Atheta (Crephalia) recessa n. sp. Subparallel, slender, rather convex, 

 shining, the punctures very fine, sparse, a little closer and more asperulate 

 on the elytra, the abdominal reticulation rather coarse but feeble; pubescence 

 very inconspicuous; color pale testaceous, the head and a large subapical 

 abdominal cloud blackish, the legs pale; elytra not paler but more flavate; 

 head as long as wide, oval, swollen slightly basally, the tempora very much 

 longer than the eyes, the carinae obsolete, only visible at base; antennae 

 moderately short, gradually and rather rapidly, strongly incrassate, the outer 

 joints transverse, the last as long as the two preceding, the second and third 

 moderately elongate, subequal; prothorax very moderately transverse, 

 unimpressed, rather wider subanteriorly than at base but with the sides feebly 

 and subevenly rounded, slightly wider than the head and a little narrower 

 than the elytra, the latter short, with diverging sides, the apices truncate, 

 the suture very distinctly shorter than the prothorax; abdomen long, nearly 

 as wide as the elytra, parallel basally but feebly narrowed apically, the tergites 

 very shining, subequal. Length 1.75 mm.; width 0.33 mm. New York 

 (Catskill Mts.). 



A very clearly defined species, to be readily known by its colora- 

 tion, slender form, oval head and short elytra. 



Atheta (Crephalia) prolongata n. sp. Similar to the preceding in coloration 

 and lustre but a little larger, more elongate and more parallel ; head similarly 

 oval and moderately inflated basally, the eyes rather small, not prominent, 

 anterior in position, the carinae merely basal; antennae distinctly longer and 

 a little heavier but otherwise similar, except that of the transverse outer 

 joints the tenth is a little less transverse than six to nine, the last large, 

 obtusely pointed, longer than the two preceding; prothorax larger and rather 

 more transverse but similar in form, as wide as the base of the elytra and very 

 much wider than the head; elytra similar though not quite so abbreviated, 

 the suture about as long as the prothorax; abdomen similar but rather longer 

 and more parallel, the apex scarcely narrowed. Length 1.85 mm.; width 

 0.35 mm. Missouri (St. Louis). 



This species is allied to the preceding but differs in its larger 

 prothorax, less abbreviated elytra and longer antennae. 



The following species is slightly aberrant in its shorter abdominal 

 segments and minute size; but the head and tarsi are similar, the 

 sterna, from what can be seen in the single type, homologous, and 

 the antennae of similar organization though shorter, with the second 

 a nd third joints much more unequal: 



