454 NEW YORK STATE MUSEUM 



Larva. Aquatic; about half as large as the larva cf Ooiydalis 

 when full grown; dark fuscous with black or dark head aud 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^ 

 8 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.l]. 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 

 paralle'l to the surface to which the mass is attached [pi. 52, 

 fig. 2]. 



