92 PROCEEDINGS OF THE AMERICAN ACADEMY 



plate is edged with yellow in front, but the surface is coarsely granu- 

 lated, and in color dull amber ; there is a similar long narrow patch 

 on the side of the anal legs, bordered above with black and straw- 

 yellow. The spiracles are green with the edge of the linear opening 

 ochreous. The yellow lateral line is obscure. The body is still pro- 

 vided with white hairs, not arising from tubercles. The body is 

 pea-green, dorsally slightly tinged with ruddy. 



Recapitulation of the more Salient Ontogenetic Features. 

 A. Congenital Features. 



1. Seta? tapering to a point, not bulbous, and finely barbed. Stage I. 



Most of them are three or four times as long as the tubercles. 



2. Some larva? in Stage I. with a very broad lateral dark band along 



the side of the body, some without it ; no transverse stripes pres- 

 ent, but the head in front is twice banded with dark brown. 



3. The 2d and 3d dorsal thoracic tubercles differentiated in Stage I., 



being slightly larger than the abdominal ones. 



4. On the suranal plate are two rudimentary tubercles, each bearing a 



tuft of bristles. 



5. The dorsal median tubercle on uromere 8 does not show such 



marked traces of its double origin as Stage I. of O. promethea, or 

 T. polyphemus, but it is more duplex than in P. cecropia. 



B. Evolution of later Adaptational Characters. 



1. Dorsal tubercles in Stage II. higher than before. 



2. The lateral dark band disappears in Stage II. 



3. In Stage III. the dorsal thoracic tubercles become nearly twice as 



long and thick as the abdominal ones. 



4. The head is not banded in Stage IV. 



5. The tubercles brightest (pink or dark carmine) and most conspicu- 



ous in the last stage. 



6. A distinct infraspiracular yellow line in Stage IV., and the sur- 



anal plate and anal legs lined with yellow, and the surface of tht- 

 suraual plate and sides of the anal legs amber. 



