AQUATIC INSECTS IN NEW YORK STATE SVS 
lateral ones two or three times as long as the median ones and 
on the outer angles of the labrum, with six discal setae, the 
distal and median pairs in a line distad of the anterior pair of 
sensory pits, subequal in length, the proximal pair twice as long, 
stout, with two lateral setae, which are stout and near tthe mid- 
dle of the lateral margin, and with four sensory pits [p1.26, 
_ fig.18]; the anterior and posterior tergal setae continuous and 
coalesced laterally with the supraspiracular setae; the su- 
praspiracular setae long, extending almost the entire width of 
the segment; the infraspiracular setae forming a broad tri- 
angular patch, broadest on its cephalic margin and extending 
almost across the segment, the adjacent margins of the su- 
praspiracular and the infraspiracular setae of the seventh ab- 
dominal segment coalesced; the anterior and the posterior 
sternal setae of the prothorax distinctly separated, those of the 
mesothorax coalesced on the median line, those of the meta- 
thorax broad and coalesced throughout their entire extent; the 
sternal setae of the first six abdominal segments broad and 
coalesced with the pedal setae, the sternal setae of the seventh 
abdominal segment minute in comparison with those of the other 
segments and separated from the pedal setae [p1.30, fig.2]. 
Pupa. White; the legs, antennae and wing pads not closely 
applied to the body; the third segment of the antennae subequal 
in length to the second; the pronotum not with a well marked 
median, impressed line and not with a tubercle on either side in 
front; the first ventral abdominal segment not quite as long as 
the next three. Length, 10mm; width, 5mm. 
Cocoon. Dark brownish, oval in outline, attached to the side 
of the small roots of Sparganium androcladium 
and much wider than the roots to which they are attached. 
Length, 10mm; width, 6mm. 
Described from numerous specimens collected by Dr J. G. 
Needham at Saranac Inn N. Y. on the bases of the roots of 
SVareaninum androcladium [pl.23]. 
HAEMONIA 
This genus contains a single American species, Haemonia 
nigricornis, which occurs rarely throughout the United 
States and Canada. The adult is quite similar in general ap- 
pearance to the species of Donacia. It can be readily recognized 
by having the tarsus narrow, glabrous, and its apical segment 
very long, and the inner and the outer margins of the elytra at 
apex usually produced into well marked teeth. 
