g6 BROOKLYN MUSEUM SCIENCE) BULLETIN 3. 3. 
species by its bi-colored legs, the posterior femora relatively more 
strongly clavate and the longer third antennal joint. The females are 
generally a little more robust than those of suhtilis and in both sexes the 
tooth of the posterior femora is occasionally very small or even sometimes 
absent. 
DoNACiA ASSiMiLis Lacordaire. 
Elongate, feebly depressed; color of upper surface metallic green; 
antennae entirely black or some or all the joints very narrowly reddish 
at base; legs reddish, femora occasionally more or less metallic at apex; 
last ventral segment more or less red. 
Head distinctly contricted behind the eyes, which are rather large 
and somewhat prominent; median impressed line deep; posterior tubercles 
absent; antennae elongate, reaching beyond the middle of elytra, third 
joint distinctly longer than the second and as long or longer than the 
first joint. 
Prothorax very nearly as in riigosa in form but sides more narrowing 
to base ; anterior angles feebly oblique and more or less rounded ; posterior 
angles prominent; lateral tubercles very feeble or absent; median im- 
pression rather broad but shallow, not extending to apex nor base; 
anterior transverse impression faint, sub-basal impression feeble or 
absent; surface rather coarsely and sparsely punctate on the disk, 
laterally rugose. 
Elytra shining, truncate or sub-truncate at apex, outer apical angles 
broadly rounded; strial punctures moderately coarse near base, finer 
near apex; intervals smooth, more or less rugose at sides and towards 
apex; lateral margin more or less acute; ante- and post-median im- 
pressions feeble or absent. 
Body beneath densely punctate; pubescence cinereous, not dense 
and not obscuring the metallic surface color; pubescent space near the 
anterior coxae small; intercoxal process of mesosternum as wide or 
nearly as wide as the middle coxae; posterior femora unarmed in both 
sexes, rather strongly clavate and reaching to the apex of the third 
ventral segment, at base much narrower than at apex. Length: 6- 
7.5 mm. 
Male: Last ventral segment distinctly depressed at middle of apex; 
last dorsal segment truncate at apex. 
Female : Last ventral segment broadly rounded at apex ; last dorsal 
segment truncate at apex, apical angles broadly rounded. 
New Jersey: Clementon (Boerner ex Nicolay). 
Maryland: Hyattsville, August (Knab). 
