STAPHYLINID/E. 51 



and distinctly more prominent than the eyes, the carinse very fine, far from 

 entire; antennae nearly as in the preceding but less stout; pro thorax .only 

 slightly transverse, distinctly wider than the head and narrower than the 

 elytra, just visibly widest before the middle, the sides moderately and 

 subevenly arcuate, unimpressed; elytra as in definita, the suture distinctly 

 longer than the prothorax; abdomen very evidently narrower than the elytra, 

 parallel, with straight sides, the fifth tergite not at all narrower but, if any- 

 thing, wider than the first. Length 1.5 mm.; width 0.3 mm. Rhode Island 

 (Boston Neck). 



A very small species differing from definite, in the smaller and more 

 convex eyes, more quadrate head, with the tempora more basally 

 swollen and in its parallel abdomen; from repleta it differs in its 

 smaller size, more slender form, relatively smaller head and pro- 

 thorax, the former less transverse, narrower abdomen and shorter 

 antennae. 



Atheta (Micrearota) gregaria n. sp. Form and coloration somewhat as in 

 loricnla but much more shining, the reticulation fine and subobsolete though 

 evident, that of the abdomen disposed in feebly evident transverse broken 

 lines; head relatively even smaller than in loricnla, the eyes larger and more 

 convex though at rather more than their own length from the base, the 

 tempora slightly swollen, the carinae fine but extending for some distance 

 from the base; antenna? moderately short, unusually stout, the first three 

 joints as usual, the outer joints transverse but with the ninth shorter than 

 the tenth, the last much longer than the two preceding, gradually acute; 

 prothorax moderately transverse, much wider than the head and distinctly 

 narrower than the elytra, slightly widest near apical third but with the 

 sides very broadly and subevenly rounded, unimpressed; elytra only 

 moderately transverse, the suture much longer than the prothorax; ab- 

 domen only a little narrower than the elytra, parallel; first three joints of 

 the hind tarsi decreasing rapidly in length, slender. Length 1.5-2.2 mm.; 

 width 0.30.4 mm. Iowa (Cedar Rapids), Brendel. 



This species is distinguishable from the three preceding by the 

 smaller head and evident though feeble micro-reticulation, and, 

 from loricula, by the decidedly longer elytra and feeble sculpture. 



Atheta (Micrearota) pristina n. sp. Moderately stout, very feebly convex, 

 colored as in the preceding, the lustre moderately shining, the reticulation 

 rather coarse and evident though feeble, the punctures minute and not dense; 

 head about as long as wide, the eyes convex, prominent and well developed, 

 as long as the tempora, which are not at all swollen and scarcely so prominent 

 as the eyes, the carinee vestigial and short; antennae short and rather stout, 

 slightly incrassate distally, the ninth and tenth joints mutually similar and 

 transverse, the latter simply a little the larger, the last rather short and obtuse, 

 not longer than the two preceding; prothorax small, only a little wider than 

 long, very little wider than the head but very much narrower than the elytra, 



