SCHAEFFER: DONACIINI of the new world. 12 1 
occasionally feebly prominent; posterior angles more or less prominent; 
lateral tubercles distinct but rather feebly prominent; median line fine, 
often very indistinct by the crowded surface sculpture; anterior im- 
pression often indistinct; posterior impression generally distinct; surface 
more or less densely, transversely and obliquely strigate, punctures 
scarcely visible except in the posterior impression in which they are 
always distinct and moderately large. 
Elytra truncate or emarginate at apex; impressions very feeble or 
absent; serial punctures moderate, liner towards apex; sutural margin 
sinuate near apex; surface with rather long, coarse, transverse rugae 
which extend from interval to interval. 
Body below densely and moderately finely punctate; pubescence 
short, but not dense; first ventral segment about as long as the three 
following joints in both sexes; pubescent space near anterior coxae 
small; intercoxal process of mesosternum very small, less than one 
fourth the width of the cavities; legs differ in the two sexes. Length: 
7.5-9.25 mm. 
Male: Posterior femora very robust, oblong, extending to apex of 
fourth ventral segment or slightly beyond, armed below with a small 
acute posterior tooth, internally and slightly in advance of the latter 
a still smaller tooth and along the lower edge a number of more or less 
distinct denticles; posterior tibiae slightly arcuate, more or less dis- 
tinctly angulate internally at about apical third, inner edge serrulate, 
which is more distinct below the angulation than above (plate V, fig. 3) ; 
last dorsal segment emarginate at apex; last ventral segment depressed 
at middle of apex. 
Female: Posterior femora extending to the apex of the fourth 
ventral segment, or very nearly so, robust but slightly more slender than 
in the male, unarmed below, internal edge feebly asperate; posterior 
tibiae nearly straight, not angulate below but along the inner edge 
distinctly serrulate ; last dorsal segment more or less distinctly emarginate 
at apex; last ventral segment arcuate-truncate at apex. 
Mr. Frost takes this species on Carex. 
Michigan: Detroit (Hubbard and Schwarz). 
Massachusetts: Sherborn, May, June and July (Frost); Framingham, 
June (Frost); Holyoke, June (Knab coll.). 
Connecticut: "Ct." (Leng coll.). 
New York: "near Brooklyn," July (Shoemaker) ; McLean, July (Cornell 
Univ.). 
New Jersey: Newfoundland (Leng); Ramsey, May (Davis). 
Pennsylvania: Hamden (Nat. Mus.); "Pa." (Leconte). 
