STUDIES ON THE TRANSFORMATIONS OF SATURNIAN 

 MOTHS, WITH NOTES ON THE LIFE-HISTORY AND 

 AFFINITIES OF BRAHMAEA JAPONICA. 



By Alpheus S. Packard. 



Presented May 11, 1904. Received January 19, 1904. 



This paper is the continuation of one presented to this Academy in 

 February, 1893. It contains descriptions of the larval stages of some 

 interesting genera of the family of silk-worm moths, Saturniidae, not 

 hitherto known. Of these genera some are among the most highly 

 specialized, while others are more primitive. It is a matter of some 

 interest to have worked out the transformations of Gallosamia calleta, an 

 annectant form between Callosamia and Philosamia. The early stages 

 of the species of Rothschildia, which represent in the New World the 

 Asiatic Attacus, have now been discovered after several years of effort 

 to secure the cocoons and eggs. We are now in a much better position 

 than before to work out the phylogeny of the family and its relations to 

 the Ceratocampidae. 



Callosamia calleta. 



A lot of 25 eggs kindly given me by the Sydney Ross Co., New York, 

 through Mr. C. B. Riker, had hatched several hours before their receipt 

 on June 6, from eggs laid May 21, 1903. 



Egg. — Oval cylindrical, somewhat flattened; chalky white; the sur- 

 face seen under a powerful lens to be minutely pitted. Length 2| mm. ; 

 breadth about 1$ mm. The hole eaten by the larva for its exit is 

 situated at the end of the shell, but sometimes encroaches on one side. 



Larva. — Stage 1. Length 6 mm. The body tapers slightly toward 

 the end. The head is as in P. cynthia, being smaller than in C. prome- 

 thea, and with no pale band ; velvety black-brown ; clypeus-posterior a 

 little paler; clypeus-auterior pale gray or dull livid whitish; the head 

 bears a few scattered black hairs. The body is blackish brown and all 

 the setae are black-brown, being of the same hue all over the body. 



