94 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Larva — Stage Z — Length 3.5 mm. (Fi-eshl\' hatched, but described from five alcoholic spec- 

 imens, PI. XLVII. fig-. 1, \<i-\c.) Bod_v stouter than in A. hicoloi\ and the head a little larger 

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

 the larva has taken food, much wider than the body, and is slightlj' wider than the prothoracic 

 segment, which is broad and flaring in front as in Anisota and A. hicolor. It is unarmed as in 

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

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

 those of the subdorsal row hx the length of the bulb. 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 



\ 



Fig. U. — Distribution uf ^ij^^pltuu iuufinu. 



body itself. They are as usual finely wrinkled. Along the basal iudf of tiie stalk are about 

 eight digitiforni tubercles, not .so many as in A. hicolor, and on the distal half only one or two. 

 The bulbous tips are of the same shape and proportions as in ^1. hicolor^ being chestnut-like, 

 and the two terminal lateral spines are as in ^1. hleoJor^ but darker. The dorsal spines on the 

 abdominal segments are as in A. hicolor^ but differ in being simple, not bearing a miiuite 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 much 

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

 this stage more developed than in A. hicolor, though undergoing a decided reduction at the end 

 of larval life. 



