STAPHYLINID^; 183 



May be placed near obsolescens but differing in coloration, in its 

 much larger elytra and many other features. 



Eumicrota Csy. 



The following species was found among some duplicate material 

 in Oligota, to the ordinary forms of which it bears considerable 

 resemblance in size and outline: 



Eumicrota oligotina n. sp. Rather narrow and subparallel, convex, 

 moderately shining, the reticulation large and distinct throughout; 

 punctures of the head very minute and few in number, of the pronotum 

 numerous, fine but asperate, parted along the middle, of the elytra also 

 numerous and more strongly asperate, becoming notably close-set apically 

 throughout the width, of the abdomen wanting, except a few bearing 

 stiff setae along the tergitic apices; color piceous-black, the elytra barely 

 at all picescent, the legs pale; head well developed, three-fourths as wide 

 as the prothorax, the eyes prominent, not quite attaining the base, the 

 antennae notably small, pale, the joints from the sixth to the apex parallel, 

 six to ten about twice as wide as long; prothorax four-fifths wider than 

 the median length, which is very much greater than that of the sides, the 

 latter converging and arcuate from the somewhat rounded basal angles 

 to the apex, the base narrowly truncate medially, thence oblique and 

 straight to each angle; just within the basal margin the canaliculation 

 from side to side is unusually deep and pronounced; elytra transverse, 

 parallel, with straight sides, the suture equal in length to the prothorax 

 and very much shorter than the flanks; abdomen about as wide as the 

 elytra, only very slightly narrowed and with feebly arcuate sides to the 

 tip, the fifth tergite (cf ) nearly four-fifths as wide as the first and having 

 two short, feeble, very strongly and posteriorly converging, slightly 

 arcuate discal carinules in about median fifth of the width, the sixth flat 

 and strongly rounded medially. Length 0.9 mm.; width 0.31 mm. 

 Missouri (St. Louis). In fungus. 



The only species with which this can be compared is atoma, 

 it having nearly similar male sexual characters, but it is less 

 minute, has a narrower and more parallel form, a relatively more 

 developed head, much less transverse prothorax, closer thoracic 

 and elytral punctures and notably smaller antennae. 



Gyrophaena Mann. 



Species of this genus occur in profusion over the colder parts 

 of North America but are less abundant on the Pacific coast, 

 though of late several new forms have been sent in from those 

 'regions. The following was overlooked in my revision of the genus 

 (Tr. St. Louis, XVI, p. 289): 



