94 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Larva — Stage /. — Length :-i.;J mm. (Fri'shh- hatched, l»ut described from live ixlcoholic spec- 

 imens. PI. XLVIl, tig. 1, \a-\c.) Body stouter than in A. hicolor, and the head a little larger 

 in proportion. The head is pale sienna brown or yellow ocher. As in A. hicolor it is, before 

 the larva has taken food, much wider than the body, and is slight!}' wider than the prothoracic 

 seoinent, which is broad and tiaring in fi-ont as in Anisota and ^-1. Ijlcolor. It is unarmed as in 

 A. hicolor^ the front edge of the tergum being coarsely granulated. Of the 8 long horns, 

 4 on the second thoracic and -i on the third, the dorsal or inner ones as usual are longer than 

 those of the subdorsal row by the length of the bull). They are as long as the body from 

 the front of the head to the eighth abdominal median horn, not being quite as long as the 



Fio. 11.— Distribuliuii of 



body itself. They are as usual tinely wrinkled. Along the ))asal lialf of tlie stalk are about 

 eight digitiform tubercles, not so many as in ^1. hicolor. and on the distal half only one or two. 

 Tli(> l)ulbous tips are of the same shape and proportions as in ^-1. hicolor, being chestnut-like, 

 and the two terminal lateral spines are as in A. hii-olor, but darker. The dorsal spines on the 

 abdominal seguKMits are as in .1. hicolm; })ut differ in l)eiiig simple, not beai-ing a minute blunt 

 spine on the base behind. There are no small, setiferous tubercles behind the main oi- anterior 

 ones, such as occur in A. hicolor. The spined tubercles of the infraspiracular row are nuich 

 longer and deeply forked or double (see tig. 1). On tlic whole tiie armature of the body is in 

 this stage more developed than in .1. hicolor. tiioiigli undergoing a decided reduction at the end 

 of larval life. 



