STAPHYLINID^E. 33 



piceous, the elytra slightly paler, the head and abdomen black ; legs very 

 pale, the antennae fuscous, but slightly paler basally; punctures small but 

 distinct, well separated, dense on the elytra; head but slightly transverse, 

 the eyes at about their own length from the base, the carinse fine, only 

 present in basal half; antennae rather long, gradually somewhat strongly 

 incrassate distally, the outer joints but little wider than long, the eleventh 

 small, pointed, not quite as long as the two preceding, the second and third 

 much elongated; prothorax rather small, only moderately transverse, dis- 

 tinctly wider than the head and correspondingly narrower than the elytra, 

 the sides broadly rounded, straighter basally, unimpressed ; elytra moderately 

 transverse, the sides diverging slightly, much longer than the prothorax; 

 abdomen parallel, slightly narrower than the elytra, the fifth tergite but 

 little longer than the fourth, the sixth (cf) broadly, rectilinearly truncate 

 at apex, the edge flat but with small punctures dividing it into short sections, 

 somewhat resembling crenulation; mesosternum extending to the middle 

 of the coxae, where it is acutely angulate but not aciculate, very widely 

 separated by a depressed and narrowly convex ridge from the extremely 

 short and broadly rounded metasternum ; first four joints of the hind tarsi 

 decreasing gradually in length. Length 2.8 mm.; width 0.66 mm. Cali- 

 fornia (found flying near Stockton). 



The sternal and tarsal characters will distinguish this species 

 very readily. 



Atheta aperta n. sp.- Rather stout, very moderately convex, not very 

 shining, the punctures asperulate and close; black, the pronotum dark piceous, 

 the elytra paler, piceous-brown, faintly clouded at the external apical angles; 

 legs pale, the antennae blackish; head rather transverse, the eyes large, 

 convex, at much less than their own length from the base, the carinae very- 

 fine and feeble but entire; antennae moderately long, feebly incrassate, 

 the outer joints distinctly wider than long, the second distinctly shorter 

 than the third; prothorax transverse, parallel and rounded at the sides, 

 much wider than the head and distinctly narrower than the elytra, unim- 

 pressed; elytra large, slightly transverse, very much longer than the pro- 

 thorax; abdomen distinctly narrower than the elytra, parallel, very feebly 

 narrowed apically, the fourth and fifth tergites equal in length, the sixth (cf) 

 feebly sinuato-truncate at apex, the edge subeven, limited at each side by a 

 small thick earlike process, only very slightly projecting posteriorly; meso- 

 sternal process aciculate, the metasternal large, angulate; basal joint of 

 the hind tarsi shorter than the second. Length 2.7 mm.; width 0.7 mm. 

 California (Arcata, Humboldt Co.). 



This species is of an ordinary type but may be identified probably 

 by the above characters. 



Atheta discipula n. sp. Nearly parallel, only slightly convex, dark blackish- 

 piceous, the prothorax paler, the elytra still paler, the abdominal segments 

 each paler apically, the legs very pale; antennae dark brown; punctures 

 very fine and close-set; head moderate, the eyes convex and prominent, at 

 much less than their own length from the base, the carinae fine and not quite 

 entire; antennae well developed, rather slender, only just visibly incrassate 

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



