454 NEW YORK STATE MUSEUM 
Larva. Aquatic; about half as large as the larva cf Corydalis 
when full grown; dark fuscous with black or dark head and pro- 
thorax; clavate projections on the skin present, similar to those 
found on larva of Corydalis, but of a light brown color and much | 
less distinct. Last four or five segments of the abdomen taper- | 
ing toward the caudal end of the body; first eight segments of 
the abdomen each with a pair of whitish lateral filaments 6 to 
S mm long, which may serve as tracheal gills in the younger 
larvae; these are sometimes indistinctly five jointed and are 
sometimes only slightly clothed with hairs; no ventral tufts of 
tracheal gills present; spiracles are found on a fold between the 
prothorax and the mesothorax and on each of the first eight 
abdominal segments, the last pair being raised more or less on 
prominent conical folds or terminating a pair of slender tubes. 
These tubes, in the species where they are present, are very con- 
tractile and vary in length at times from about 5 to 12 mm [see 
Lintner, 1893, pl.1]. On the last segment is a pair of anal pro- 
legs, each with a pair of claws and a lateral filament which is 
decidedly hairy; antennae with five segments, the first segment 
often being retracted. 
Several larvae in the Museum of Comparative Zoology are. 
much like the ones I have formerly collected. Eight collected 
at Cambridge have no central black stripe on dorsal aspect of 
abdomen and thorax. One sent by H. Edwards from California 
has last pair of spiracles nearly sessile. The lateral filaments 
are unusually long and rather distinctly jointed. Specimens 
collected in Kentucky by Sanborn have last pair of spiracles 
nearly sessile, and the last pair of lateral filaments very long, 
reaching much past the anal ones. The last pair of respiratory 
tubes are clearly shown, and are confluent or adjacent at their 
base on specimens collected at Brookline by Mr Henshaw. 
Eggs. The eggs of Chauliodes have been described and photo- 
graphed by Dr Needham [1901]. Riley [1879] briefly compared 
them with eggs of Corydalis in these words: “ Eggs of Chauliodes 
have a larger tubercle or stem on the top, and are not covered 
with white, albuminous material as are those of Corydalis.” 
These are the only references to the eggs which I have found in 
literature. 
The masses are shaped not unlike the masses of Corydalis 
eggs, but are more variable in size and shape. ‘They are reddish 
brown, with no protective coating over the mass. The eggs 
of a mass are usually placed in three layers of unequal size, 
the smallest layer being on top; the longer axis of each egg is 
parallel to the surface to which the mass is attached [pl. 52, 
fig. 2]. 
