78 MEMOIRS ON THE COLEOPTERA. 



ing the truncature of the median third of the arcuate apex of the 

 sixth male tergite less defined, its ends not so tumid, the lateral pro- 

 cesses long, inwardly arcuate. 



Affluens Csy., may, I think, more properly be regarded as a 

 subspecies or variety of irvingi; the differences between the two are 

 very slight; it is abundant but cannot be identified with any of the 

 species of Erichson or Melsheimer. 



Two males from Asheville, North Carolina, represent a species 

 so closely allied to irvingi that it seems not worth while to name it, 

 though the prothorax is materially larger and virtually as wide as 

 the elytral base. Irmngi occurs throughout the Hudson watershed 

 at Ithaca, Catskill Mts., western Long Island, Stafford, Conn. 

 W. E. Britton and Anglesea, New Jersey. It is perhaps a little 

 larger and heavier on the whole than the variety affluens, from the 

 Narragansett region, and with somewhat greater relative develop- 

 ment of the head and prothorax. 



Atheta (Stethusa) videns n. sp. More slender, deep black, the pro- 

 thorax not distinctly paler, the elytra and legs as in the preceding, the 

 sculpture and vestiture also nearly similar, though the latter is rather 

 longer and more distinct; head moderate, three-fourths as wide as the 

 prothorax, formed as usual, the antennae rather long and moderately 

 thick, scarcely incrassate distally, black, pale basally, the second joint 

 shorter than the first or third, fourth longer, the tenth slightly shorter, 

 than wide; prothorax relatively small, fully one-half wider than long, 

 of the usual form otherwise; elytra well developed, with rather strongly 

 diverging straight sides, at apex two-fifths wider, the suture fully a fifth 

 longer, than the prothorax; abdomen rather slender, parallel, with very 

 feebly and evenly arcuate sides, the sixth tergite ( 9 ) very broadly 

 rounded, becoming just visibly sinuato-truncate at apex. Length 3.2 

 mm.; width 0.76 mm. Rhode Island (Boston Neck). 



I obtained a single example of this species about a year ago; 

 it is quite distinct in general appearance, relatively smaller head 

 and prothorax and in its black coloration. 



Atheta (Stethusa) cynica n. sp. Rather slender and shining, feebly 

 convex, blackish-piceous, the head black; abdomen black, the apex and 

 the basal segments apically feebly pallescent; punctures fine, disposed 

 as usual; head rather small, slightly transverse, the eyes large; antennae 

 piceous-black, the basal joint pale, the second joint barely shorter than 

 the third, fourth longer, the tenth evidently shorter, than wide, outer 

 parts gradually very moderately incrassate distally; prothorax rather 

 small, short and transverse, one-half wider than long, parallel, the sides 

 more arcuate anteriorly, nearly straight basally, the median line not at 



