132 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
DoNACiA NOTMANi new species. 
Plate V, fig. 18. 
Elongate, color blue or purple (males) or aeneous, cupreous or 
bright metallic green (females) ; antennae either entirely black with 
feeble metaUic tint or some of the joints reddish at base; legs concolorous. 
Head a little prolonged, truncate and moderately constricted behind 
the eyes, which are small and moderately prominent; median impressed 
line fine and deep; above the antennal tubercles a more or less distinct 
and deep circular impression; surface very feebly pubescent and closely 
punctate with moderate punctures; antennae reaching to about middle 
of elytra in the male, shorter in the female; third joint slightly longer 
than the second but not as long as the first joint. 
Prothorax about as wide at apex as long; anterior angles distinct, 
occasionally feebly prominent; posterior angles generally more or less 
distinctly prominent; lateral tubercles moderately large and convex, 
separated from the disk by a rather shallow, wide and densely rugose 
impression; sides below the lateral tubercles more or less distinctly 
arcuate, converging behind, though sometimes feebly; median line 
generally distinct but rarely deeply impressed; anterior impression 
absent; posterior impression very distinct; surface shining, transversely 
and obliquely strigate-rugose, the middle of disk occasionally without 
this sculpture, but finely and sparsely punctate. 
Elytra with ante-median impressions distinct or feeble; post- 
median impressions feeble or absent; serial punctures nearly alike in the 
basal and apical part; surface shining, with coarse transverse rugae; 
intervals minutely, sparsely punctate. 
Body below moderately closely punctate; pubescence cinereous, 
very short and sparse; prosternal side pieces rather coarsely longi- 
tudinally strigate; posterior femora moderately incrassate, at base 
narrower than at apex, armed below with a moderately large, acute 
tooth. Length: 6.5 to 8 mm. 
Male: First ventral segment shallowly, longitudinally excavated 
at middle; last ventral segment distinctly depressed at middle of apex; 
last dorsal segment truncate at apex, rarely broadly but feebly emarginate. 
Female: First ventral segment normal or slightly flattened at 
middle; last ventral and dorsal segments broadly rounded at apex; 
lower vaginal plate narrow, parallel for a short distance, thence a little 
wider at about the point where the sides begin to converge to apex into 
an acute point (plate V, fig. 18). 
