172 Journal New York Entomological Society, [Vol. xxv. 



claw of the front tarsus in the male is a little thickened, straighter, 

 and slightly sinuate interiorly; the modification is however feeble. 

 Cocheconis is separable from the other members of the concinnus 

 group by the very coarsely punctate metasternum and coxal plates. 



Hydroporus ohionis new species. 



Of the concinnus group and similar to the preceding except as follows: 

 The prothorax is rufocastaneous, with the front and hind margins blackish, 

 head slightly to scarcely paler, elytra pale flavotestaceous with the usual broad, 

 irregular transverse black fasci^e. Body beneath rufopiceous, legs rufotesta- 

 ceous. Prothorax more finely and sparsely punctate at the middle of the disk 

 than elsewhere (this difference being scarcely obvious in cocheconis) ; elytra 

 slightly more coarsely and sparsely punctate than in cocheconis, and very dis- 

 tinctly more so than in concinnus ; metasternum and coxal plates less coarsely 

 and more sparsely punctate than in cocheconis, but more coarsely so than in 

 concinnus. Length 3.2 mm.; width 1.5 mm. 



Cincinnati, Ohio. Three males, collected by Chas. Dury, and sent 

 me many years ago mixed with examples of what we now regard as 

 concinnus. The latter averages larger, the prothorax and head con- 

 colorous with, or only slightly darker than the elytra, the lower sur- 

 face piceous. 



Hydroporus shermani new species 



Narrowly ovate, male moderately shining, female with duller luster, pu- 

 bescence obvious, color rufotestaceous above and below, pronotum with apical 

 marginal fuscous spot, elytra with shorter basal and two broad uneven discal 

 fasciae irregularly connected longitudinally, so as to leave the sides at base, an 

 antemedian and a postmedian interrupted fascia made up of longitudinal spots 

 and dashes of variable length, and the apex pale. Antennae of moderate 

 length, the terminal joint and the apices of several preceding njore or less 

 infuscate. Head finely, rather closely punctate, lateral impressions broad but 

 distinct, clypeus not very evidently thickened, its posterior margin not very 

 distinctly defined at middle. Prothorax rather finely but strongly, moder- 

 ately, closely punctate, sides broadly, evenly arcuate, thickened margin nar- 

 row. Elytral punctures equal to those of the prothorax, their distances apart 

 varying from one and a half to two times their own diameters. Prosternal 

 anterior intercoxal declivity abruptly formed, but not strongly protuberant 

 at summit; metasternum and coxal plates coarsely, rather closely punctate; 

 ventral segments moderately strongly, not closely punctate, becoming finely, 

 sparsely so toward the apex ; coxal lines gradually, rather strongly divergent 

 in front. Front and middle tarsi very broadly dilated in the male, evidently 

 narrower but unusually wide in the female ; anterior claw of front tarsus in 

 the male thickened and only half as long as the posterior one. Length 3.4 

 to 3.6 mm. ; width 1.7 to 1.75 mm. 



