318 NEW YORK STATE MUSEUM 
sternal setae of the first three abdominal segments broad and 
not divided longitudinally, those of the fourth abdominal seg- 
ment narrow and hardly continuous at middle, those of the 
fifth, sixth and seventh abdominal segments divided longitudi- 
nally; the pedal setae of the first three abdominal segments 
almost as long as the width of the segment, those of the last 
four segments smaller and circular in outline [pl.29, fig.1]. 
Pupa. Whitish; legs, wing-pads and antennae not closely at- 
tached to the body; the second and third segments of the 
antennae subequal; the pronotum with a distinct median fur- 
row and without lateral tubercles; the first ventral abdominal 
segment as long as the next five. Length, 11mm; width, 4mm. 
Cocoon. Black; oval in outline, rotund, concave on the ven- 
tral surface; and attached in groups to the apices of the large 
lateral stems of Nymphaea advena. Length, 15mm; 
width, 7mm. 
Described from specimens loaned by the Museum of Compara- 
tive Zoology and collected by George Dimmock at Canobie yee 
iN EE bully, 1887. 
Donacia palmata 
Egg. 1mm long, opaque white, both ends bluntly rounded, 
the sides parallel; laid in a double row, 40 or 50 eggs in a mass, 
the mass completely surrounded by a thick, gelatinous covering, 
on the under surface of the leaves of Nymphaea advena 
and of Castalia odorata ([pl.21, figs. 1 and 4; pl. 24, 
fig.4]. 
Larva. Mandibles apically bidenticulate, the inner margins 
with poorly marked crenulations [ p1.25, fis. 11]; eyes present, 
four in number, three in the anterior row [pl.25, fig.10]; the seg- 
ments of the legs with few setae, four or five setae to a segment 
[pl.25, fig.12]; the labrum four sided, with eight long marginal 
setae, the six outer setae much the longer and equidistant from 
each other, the median pair about half the length of the others, 
with six discal setae, the distal and median pairs near the 
middle of the labrum and proximad of the sensory pits, the 
distal pair not more than half the size of the median pair, the 
proximal pair distinctly longer than the median pair, the me- 
dian pair more distant from each other than either the dis- 
tal or proximal pairs, the two lateral setae long and slen- 
der, and with four sensory pits [pl.25, fig.9]; the anterior 
tergal setae of the mesothorax and metathorax and first three 
abdominal segments divided into three groups, those of the tho- 
racic and first two abdominal segments widely separated, those 
of the other segments not so well marked, the anterior tergal 
setae of the first five abdominal segments attenuated laterally 
