144 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
Male: First ventral segment feebly flattened at middle ; last ventral 
segment slightly depressed at middle of apex; last dorsal segment 
broadly but not deeply emarginate at apex. 
Female : Last ventral segment broadly rounded at apex ; last dorsal 
segment more or less distinctly emarginate at apex; lower vaginal plate 
as in sulcicollis, that is, the anterior part is shaped like an arrowhead, 
but the posterior part has the sides straight parallel, which are in the 
latter species somewhat arcuate. 
The type is a female, doubtfully labelled "Indiana" in the Aluseum 
collection, the allotype a male from Wisconsin (O. Dietz). 
Canada: "Canada" (Brit. Museum in Baly and Fry colls.). 
Ontario: Point Pelee, June (Bigelow in coll. Frost). 
Indiana: Pine, May (Wolcott) ; Lake and Kosciusko counties, June 
(Blatchley). 
Wisconsin: "Wise." (O. Dietz). 
Prof. Blatchley swept this species from sedges in low moist meadows. 
Of the eight specimens which I have seen of this species only one 
is a male, which possibly was collected near Milwaukee, where the late 
Ottomar Dietz began to collect Coleoptera. 
D. harrisi in Prof. Blatchley's "Coleoptera of Indiana" is wrongly 
identified, it is the above described new species. 
The head in this species is less strongly narrowed behind the eyes 
than in most of the species of this section of the genus, but is distinctly 
constricted; the neck is wide; the prothorax has the lateral tubercles 
feeble, scarcely evident laterally, the sculpture rather densely punctate- 
rugose above, below at sides more or less vermiculate-rugose and near 
the anterior coxae is a small sparsely pubescent spot. This pubescent 
spot is absent in all Plateumaris, which have the prothorax above not 
pubescent — in the few European species which have the prothorax above 
pubescent the entire underside is also pubescent. The legs are pale and 
the posterior femora robust (pi. V, fig. 7), very slightly clavate and at 
base generally slightly wider than at apex with a rather large tooth below. 
The last dorsal segment is more or less distinctly emarginate at apex in 
both sexes. The lower vaginal plate (pi. V, fig. 12) of the female is 
nearly as in sulcicollis but the sides above the triangularly shaped apical 
part are straight — in sulcicollis slightly arcuate. 
The females of this species look superficially like those of the 
European affinis. , 
