schaeffer: donaciini of the new world. ioi 
and finely rugose intervals of elytra, sparse pubescence of the ventral 
segments and the shorter, bicolored posterior femora. 
DoNACiA POROSicoLLis Lacordaire. 
Elongate, slender, feebly depressed; color of upper surface cupreous; 
antennae reddish, joints above more or less black, below some or all 
reddish; legs reddish, femora in apical half more or less cupreous; body 
below cupreous, last ventral segment occasionally more or less reddish 
at apex. 
Head feebly constricted behind the eyes, which are moderately 
large; median line deeply impressed; posterior tubercles more or less 
distinct; ocular orbits distinct; surface rugose; antennae reaching to 
or beyond the middle of elytra, third joint distinctly longer than second 
and as long or slightly shorter than first. 
Prothorax as wide at apex as long, occasionally one fourth longer 
than wide; sides feebly narrowing from apex to base; anterior angles 
distinct, not or distinctly projecting laterally; basal angles more or less 
prominent; lateral tubercles feeble or absent; median impressed line 
fine and generally distinct; surface more or less densely, coarsely or 
moderately coarsely punctate, intervals with finer punctures or finely 
rugose. 
Elytra sub-convex; apices truncate; strial punctures moderate at 
base, gradually smaller towards apex, where they are much smaller than 
at base; intervals finely striate-rugose, this sculpture scarcely finer at 
apex than at base; ante-median and post-median impressions generally 
very feeble or absent. 
Body below very densely and finely punctate; pubescence white or 
yellowish-white and rather dense, concealing nearly the surface color 
of the first ventral segment, especially in the male, the pubescence con- 
sisting of a little coarser and longer hairs than in subtilis; intercoxal 
process of mesosternum narrow; posterior femora extending to the apex 
of the third ventral segment or slightly beyond, generally feebly incrassate 
and armed below with a small tooth. Length: 6-8 mm. 
Male: First ventral segment generally depressed and rather densely 
pubescent; last ventral segment distinctly depressed at middle of apex; 
last dorsal segment truncate at apex. 
Female: Last ventral and dorsal segments rounded at apex. 
Ontario: Hastings Co. (Ent. Branch). 
Michigan: Livingston Co., May (Hatch) ; Washtenaw Co., May (Hatch) ; 
Marquette (Hubbard and Schwarz) ; White Fish Point and Lake 
Superior (Hubbard and Schwarz). 
