EAGLES IMPERIALIS 273 



had each two horns oo the dorsum, bifurcate and with 

 white tips. The eleventh segment had one long horn 

 and four tubercles with setae. The other segments had 

 two short dorsal horns and one on each side. The 

 anal segment had two large tubercles or horns and 

 several small ones. The legs and props were black. 

 There were sparse hairs all over the body. They ate 

 part of their shells. 



On the fifth day they molted, the color gi'owing 

 chocolate-brown . 



On the ninth day they molted again. Their heads 

 were large, round, with two dark brown marks. The 

 anal shield was very conspicuous, being tan-colored, 

 with three branching tubercles. The horns on the 

 thoracic and eleventh segments were much longer and 

 more noticeable, light with dark tips. There was a 

 dark dorsal line. The spiracles were very conspicu- 

 ous, set in pale brown ovals. 



On the fifteenth day they molted again. Their heads 

 were brown, with darker face-lines. They had long 

 white hairs, sparsely scattered over the dorsum and 

 substigmatal regions, and shorter, closer ones on the 

 sides. The anal plate and props were very horny, 

 black dotted with white and edged with ocher-yellow, 

 polished like hard rubber. The spiracles were oval 

 whitish spots set in dark brown. One caterpillar came 

 out bright green, with a pale yellow head having dark 

 brown face-lines, and its anal plate and props were 

 edged with pale yellow. All had the second, third, and 

 eleventh segments much humped under the horns. 



On the twenty-second day they molted for the fourth 

 time. The green one had the head cream-colored, with 



