schakffer: donaciini of the new world. 79 
more or less distinct metallic tint especially at sides, or elytra with a 
feeble blue or greenish metallic tint; antennae generally pale, joints 
apically more or less black; underside black, or entirely or partly reddish; 
legs pale, upper edge of femora black or greenish metallic. 
Head rather feebly constricted behind the eyes which are large and 
prominent; surface closely punctate, more densely anteriorly; median 
line deeply impressed; antennae reaching to or below the middle of 
elytra, second and third joints sub-equal, third generally slightly longer 
than second and usually shorter than the first joint. 
Prothorax strongly transverse, not quite twice as wide at apex than 
long; sides gradually converging from apex to base; anterior angles 
distinct and moderately prominent; posterior angles prominent; surface 
shining with a few fine punctures on the disk; median line distinct, 
sometimes feeble or interrupted; anterior impression absent; basal 
impression distinct, rather broad and generally coarsely sculptured or 
strigate-rugose ; lateral tubercle rather distinct, not prominent, usually 
well separated internally from the disk by a finely rugose impression. 
Elytra shining; intervals smooth, more or less distinctly rugose 
towards apex; dorsal impressions feeble; apices truncate, rarely more or 
less distinctly emarginate, outer angles distinct and generally feebly 
rounded. 
Body below finely and very densely pubescent, concealing entirely 
the surface color and punctuation; intercoxal process of middle coxae 
as wide or very nearly as wide as the middle coxal cavities; pubescent 
space near the anterior coxae wide. Legs variable in the two sexes. 
Length: 5-9 mm. 
Male : Last dorsal segment truncate or very feebly, broadly emargi- 
nate at apex; last ventral segment truncate at apex and distinctly de- 
pressed at middle; posterior femora strongly incrassate in more than 
apical half, slightly curved in about basal fourth; below armed with a 
small anterior tooth and a larger posterior tooth, behind this latter a 
more or less distinct oblique serrate ridge, which is often broken up into 
one or more denticles; posterior tibiae internally serrate. 
Female: Last dorsal segment sub triangular; last ventral segment 
slightly shorter than the dorsal, feebly arcuate at sides and at apex 
rounded; posterior femora with one tooth below, the oblique ridge 
behind this tooth generally more feeble and represented by one or more 
denticles; posterior tibiae rather feebly serrate or denticulate. 
British Columbia: Victoria (Ent. Branch, Ont.). 
Quebec: Rigaud, August (Chagnon). 
