154 TWENTY-FOURTH REPORT ON THE STATE MUSEVM. 



In the fall of 1870 diligent search was made for the larva in the 

 locality at Bath, where it had been abundant the preceding year, 

 as above recorded, without finding a single individual. Its non- 

 occurrence indicates a marked periodicity in the appearance of the 

 species or, possibly, an exhausted locality from the collections made. 



A single specimen of the closely related species Citheronia regalia 

 Hiibner, has been taken near Albany, by Mr. Sautter, and I am 

 informed by Dr. M. Cooke, of Utica, N. Y., that its larva has been 

 found, on one occasion, in the vicinity of that city. I have not met 

 with it in my field collections. 



