64 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



The short luaxillie of A. iicolor, the only species whose pupa has been examined, show that 

 these appendages have been aborted in some ancestral form.. 



Geographical distrihutlon. — A South and Central American genus; the more primitive gen- 

 eralized forms being neogffiic — i. e., Brazilian, and extending into the Argentine Republic. The 

 North American species extend from Mexico into the Southwestern States and northward along 

 the Mississippi Valley and Atlantic coast — i. e., inhabiting the Austro-riparian and southern and 

 middle portions of the Appalachian siibprovinoes. 



SynonymiccLl history. — Although Herrich-Schaeffer's name Adelocephala has the priority, 

 Walsh's name Sphingicampa is much more descriptive and applicable. He not only described 

 the imago, but gave a detailed description of the larva and pupa. Adelocephala was apparently 



Fig. 7. — Distribution ot tbe geuus Adelocephala. 



first proposed in MS, by Boisduval, but the first printed and published mention of it is to 

 be found in Herrich-Schaefl'er's Aussereuropaischer Schmetterlinge, as mentioned above in 

 the synonomy. Boisduval's Othorene can not be separated from his Adelocephala, while, in the 

 future, when its transformations are known, A. alholineata nvAX be found suflicientlj^ distinct to 

 be assigned to a separate genus. 



Until we know the details of the life history of each species of this genus it would not be 

 advisable to split it up into distinct genera. After carefully working out, with what material I 

 have had, the larval forms and histories, and the head and antennal charactei's, as well as the 



