schaeffer: donaciini of the new world. 65 
Elytra alutaceous, generally dull; strial punctures fine; intervals 
scarcely rugose; apex truncate or more or less distinctly emarginate. 
Body below densely clothed with very short, white pubescence; 
the side pieces of prosternum entirely pubescent, but not densely. 
Length: 5-6.5 mm. 
Male: Posterior femora extending far beyond the elytral apices, 
very strongly incrassate from a little below base and armed with two 
acute teeth, behind the posterior one a more or less distinct oblique ridge, 
which is often broken up into one, two or three small teeth or tubercles 
or occasionally, though rarely, absent; posterior tibiae serrulate within 
and prolonged internally at apex into a moderately long process. Last 
dorsal segment arcuately narrowing towards apex into a more or less 
distinct obtuse point; last ventral segment with a deep, rather broad 
median impression at apex; intercoxal process of mesosternum not 
quite as wide as the middle coxae. 
Female ; Posterior femora extending to or slightly beyond the elytral 
apices, very feebly incrassate toward apex, unarmed below; posterior 
tibiae normal and not serrulate internally; last dorsal segment elongate, 
gradually narrowing towards apex, which is arcuate; last ventral segment 
shorter than the last dorsal and rather broadly arcuate at apex; inter- 
coxal process of mesosternum about as wide as the middle coxae. 
Massachusetts: Cambridge, January (G. R. Crotch); "neighborhood 
of Boston" (Lacordaire). 
New York: Carmel, August (Squire). 
New Jersey: Palatine, July (Liebeck) ; Quick Pond, Sussex Co.,. June 
(Davis); Brookville, July (Leng); Lakehurst, September (Wood- 
ruff); Hammonton, July (Wenzel) ; Clayton, September (Wenzel). 
South Carolina: Swansea, August (Knab). 
Georgia: Bainbridge, June (Bradley). 
Florida: Enterprise (Schwarz). 
This species is taken on the flowers and leaves of the white water lily. 
D. militaris is wrongly placed as synonym of palmata, it is the 
same as D. floridae Leng. Reading Lacordaire's description of militaris 
my attention was called to the possible misidentification of this species 
by his comparison of the form of the posterior femora with that of the 
European bidens Oliv. = versicolorea Brahm. D. floridae is the only- 
North American species with hind femora of the males much like those 
of the European versicolorea and as the rest of the description agreed 
also very well I had scarcely any doubt that militaris and floridae were 
