schaeffer: donaciini of the new world. 133 
New York: Wallface Mt., Essex Co., July (Notman, Nicolay and 
Quirsfeld), 
Type in the Brooklyn Museum collection; paratypes in National 
Museum collection and that of Mr. Notman, whose name I attach to 
this interesting addition in recognition of various favors received. 
D. notmani is closely related to emarginata and looks very much 
like that species. It differs from the latter or its varieties in the peculiar 
circular impression above the antennal tubercles of the head, the relatively 
coarse strigate-rugose sculpture of the upper and underside of prothorax, 
the truncate or sub-truncate apex of last dorsal segment of the male, 
broadly rounded in the female — in emarginata the last dorsal segment in 
both sexes is very distinctly emarginate — and in addition the lower 
vaginal plate of the female is distinctly smaller and of different form 
than in emarginata. D. nitida, which it also in some way resembles, is a 
little stouter insect with shorter antennal joints, head behind the eyes 
more deeply constricted, larger thoracic tubercles, more strongly in- 
crassate posterior femora which latter have a large tooth, and the lower 
vaginal plate, as much as can be seen in the single female, is evidently 
broader. 
I have seen about fifty specimens of both sexes of this species of 
which the males are always dark blue or rarely purple while the females 
are more brightly colored and apparently never dark blue. 
The circular cephalic impression above the antennal tubercles is 
more or less distinct in the majority of specimens seen but in one or 
two it is very faint. The lower vaginal plate of the females is smaller 
than in any other North American species of the subgenus Plateumaris. 
DoNACiA EMARGINATA Kirby. 
Plate V, fig. 14. 
Elongate; color black, blue, purple, metallic green, aeneous or 
cupreous; antennae entirely black with metallic tint or joints more or 
less bicolored; legs concolorouF, tibiae and tarsi at base occasionally 
reddish. 
Head slightly prolonged behind the eyes, truncate on each side and 
distinctly constricted, the eyes small and moderately prominent; median 
impressed line deep ; surface densely punctate with moderate punctures ; 
antennae extending to about the middle of elytra, rarely beyond the 
middle; second and third joints small, third a little longer but never as 
long as the first joint. 
