~ AQUATIC INSECTS IN NEW YORK STATE 455 
The brown or pink micropylar projection is knobbed, and is 
placed a little to one side of one end of the egg; otherwise the 
egg is cylindric, with rounded ends [fig. 20]. 
Life history of Chauliodes 
The eggs were first found by the writer on the underside 
of a boat landing built of wood, on the southeast shore of 
Cayuga lake near Ithaca N. Y., June 14, 1899, while searching 
for them. In this case there was but a single mass, freshly 
deposited within two feet-of the surface of the water. The 
second lot, found June 16th in Coy glen, was composed of three 
groups or clusters, each cluster being made up of about 30 or 
40 egg masses. Each mass has from 1000 to 2000 eggs. These 
were all within a radius of 2 feet on a large glacial rock, about 
2 or 3 feet above running water. Farther-up the glen in many 
places I found single masses on small rocks overhanging the 
water. Some of these were 10 or 15 feet above the water. In 
one case a mass was found on an overhanging limb of a tree. 
Mr A. D. MacGillivray has frequently found them on leaves and 
limbs. Stones seem to be preferred by the adults when deposit- 
‘ing their eggs. 
The hatching takes place at night, five or six days after the 
eggs are deposited. The young larva breaks from the egg at 
the end near the micropylar projection, which is the cephalic 
end of the embryo, and readily finds its way to the water, usu- 
ally by dropping directly from the egg mass or the object to 
which it is attached. | 
The freshly hatched insect differs from the more mature larva 
in having the lateral filaments relatively much longer, and the 
head larger; and the antennae only two segmented. 
The young are not very active and will remain in the portion 
of the stream below the egg mass for several months or prob- 
ably longer if not carried away by the strong current. A muddy 
bottom is not distasteful to them, though they may be found 
in many parts of our common streams; they are less frequently 
found in the swiftest parts. The species (C. serricornis) 
