schaeffer: donaciini of the new world. 55 
frequently one or more of the ventral segments pale; legs concolorous, 
pale, tarsi and apex of tibiae frequently black. 
Head densely pubescent but along the median line without or with 
little pubescence and more or less smooth and shining; antennae stout, 
not reaching to the middle of elytra. 
Prothorax about as wide at apex as long; laterally more or less 
deeply emarginate; lateral tubercle small and generally indistinct; 
anterior angles broadly arcuate and more or less prominent anteriorly; 
median line distinct, generally wider and often fovea-like posteriorly; 
no sub-basal transverse impression; surface smooth and shining, sparsely 
and finely punctate near base and occasionally along anterior margin 
coarsely punctate ; below anterior angles frequently rugose ; occasionally 
on each side slightly above middle a small rugose space, which is generally 
black. 
Elytra shining, oblong-oval; epipleurae from a postero-lateral view 
wider than the last interval; intervals between the rows of punctures 
flat, smooth and shining, towards apex convex. 
Body below very densely pubescent with very short, yellowish 
silken hairs; the hairs of the pubescent spot near anterior coxae dense, 
surface externally shining and rather feebly strigate-rugose. Length: 
6-7 mm. 
The specimens before me are from Dist. of Columbia; Long Island, 
N. Y.; Minnesota; Iowa; Manitoba and Washington, but the species 
occurs undoubtedly in most of the intermediate localities. It is also 
found in Mexico and described originally as a distinct species, but later, 
on comparison with North American specimens, the author states that 
the Mexican specimens are conspecific with the former. In Genera 
Insectorum it is listed as a variety. I have seen three Mexican specimens 
kindly sent me by Mr. Arrow. Two are colored like our North American 
specimens and do not differ except that one is more densely punctate 
along base and lateral margins of prothorax and anteriorly finely and 
distinctly punctate. The third specimen is black above and below, 
except the legs and a large spot at anterior angle ferruginous; the pro- 
thorax in this specimen is also coarsely and densely punctate basally and 
laterally. 
Genus Donacia Fab. 
Head not or distinctly prolonged and narrowed behind the eyes, 
the prolonged part (tempora) truncate or rounded ; ocular orbits distinct 
or entirely absent; median impressed line distinct and deep, not limited 
anteriorly by a ridge-like elevation; antennae variable. 
