no BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
compared with this common species it has a wider elytra which is ap- 
parently more depressed above, larger eyes, bicolored and in both sexes 
unarmed posterior femora. D. assimilis which has similarly colored 
unarmed posterior femora is a narrower and a little more convex insect 
with longer third antennal joint, prothorax generally with a distinct, 
longitudinal median line and differently formed posterior femora, which 
is shorter, more strongly clavate and at base distinctly narrower than 
at apex. 
DoNACiA LiEBECKi Schaeffer. 
Rather short and sub-parallel, depressed; color aeneous or bright 
cupreous; legs reddish, femora with or without metallic spot; antennae 
reddish, joints black at apex, occasionally entirely black. 
Head relatively and strongly narrowed and constricted below the 
eyes which are moderately large and prominent; median line deeply 
impressed; posterior tubercles feeble or absent; surface densely and 
moderately finely punctate; antennae rather short, not quite reaching 
to the middle of elytra in the male, shorter in the female, second and 
third joints small, equal or subequal, fourth shorter than the first joint. 
Prothorax slightly wider at apex than long; sides generally feebly 
converging behind; anterior angles distinct, occasionally slightly pro- 
jecting; posterior angles feebly prominent; lateral tubercle feeble; 
median impressed line generally absent but occasionally present; anterior 
transverse impression absent; posterior impression faint or absent; 
surface moderately coarsely punctate, punctures more or less transversely 
confluent. 
Elytra with the ante-median and post-median impressions distinct; 
apices squarely truncate, outer angle distinct but rounded; surface 
generally rather coarsely rugose at about basal third, towards apex the 
intervals more finely strigate-rugose ; serial punctures relatively large, 
gradually finer towards apex. 
Bod}^ below densely and finely punctate and moderately densely 
pubescent with short, yellowish-white hairs; pubescent space near 
anterior coxae moderately large; intercoxal process of mesosternum 
about one third the width of the cavities; hind femora rather feebly 
clavate, reaching the apex of the third ventral segment in the male, a 
little shorter in the female, at base slightly narrower than at apex, armed 
below in both sexes with a small and generally acute tooth. Length: 
6-7.5 mm. 
Male: Last dorsal segment more or less distinctly emarginate at 
apex; last ventral segment impressed at middle of apex. 
