STAPHYLINID.E. 117 



black, barely piceous basally, short, the second joint very moderately elon- 

 gate, longer than the strongly obconic third, the outer seven joints forming a 

 stout and subfusoid mass, apparently slightly widest at the eighth joint, 

 the joints strongly transverse, the ninth and tenth mutually similar, the 

 last a little longer than the two preceding; prothorax convex, moderately 

 transverse, parallel, with evenly and evidently arcuate sides, distinctly 

 wider than the head and almost as wide as the elytra, not obviously impressed ; 

 elytra only slightly abbreviated, the suture nearly one-half longer than the 

 prothorax, the apices moderately and rather broadly sinuate externally; 

 abdomen rather short, a little narrower than the elytra, parallel, with very 

 feebly arcuate sides, the first five tergites equal, the sixth (d") much nar- 

 rower, truncate and with four short teeth, the two medial very broadly 

 rounded, slightly tumescent and separated by a feeble sinus, each separated 

 from the slightly narrower but not much longer, dorsally somewhat concave, 

 lateral teeth, by a small sinus, which is scarcely more than half as wide as 

 the medial sinus. Length 1.7-1.9 mm.; width 0.48-0.6 mm. California 

 (San Mateo), Baker. 



The sterna are nearly as in dissensa, except that the mesosternal 

 apex is more acute, and the tarsi are nearly similar. A specimen 

 in my collection from Calaveras Co., does not appear to differ. 



Pseudota irrupta n. sp. Subparallel, moderately convex, rather shining, 

 the reticulation distinct, somewhat transversely wavy onjmost of the abdomen, 

 the punctures fine, asperulate, not very dense; color piceous, the abdomen 

 piceo-testaceous, wdth an indefinite subapical blackish cloud, the legs pale; 

 head nearly as in the preceding but not quite so transverse and with less 

 prominent eyes, the carinse very feeble and far from entire; antennse black, 

 paler basally, short, gradually strongly incrassate to the tip, the second joint 

 slightly more elongate than in prcesaga, a little longer than the third, the 

 outer joints strongly transverse, the ninth and tenth mutually similar, the 

 last barely as long as the two preceding; prothorax nearly as in the preced- 

 ing in outline but larger and with the median line impressed finely throughout, 

 a little more strongly basally, similarly proportioned with regard to the head 

 and elytra, the latter a little more abbreviated, the suture about a third 

 longer than the prothorax, the apices not evidently sinuate externally; ab- 

 domen finely, rather sparsely punctulate, perfectly parallel, with nearly 

 straight sides, narrower than the elytra, the tergites equal; hind tarsi with 

 the four basal joints moderately elongate and equal. Length (extended) 

 2.0 mm.; width 0.55 mm. British Columbia (Metlakatla), Keen. 



A single rather immature specimen, apparently female. The 

 sternal characters are nearly as in the preceding. 



Pseudota nescia n. sp. Subparallel, moderately convex, rather shining, 

 the micro-reticulation evident, rather coarse and irregular on the abdomen, 

 the punctures fine, well separated, slightly asperate on the elytra; color 

 black, the elytra dark piceous-brown, the legs pale brown; head almost as 

 long as wide, parallel, the eyes rather convex, at about their own length from 



