86 CATERPILLARS AND THEIR MOTHS 



snake-skin, as was the anal shield. In place of the 

 caudal " mound " was a very large, round tubercle of 

 three shades of brown with a black center, giving the 

 effect of a bright eye. 



The other caterpillars were strikingly different. They 

 had bright leaf-green patches on the head, one large 

 green patch on the dorsum of each segment, one on the 

 substigmatal region of each segment, and three or four 

 on the pink-brown venter. These patches were marked 

 off by browns of the same shades as those of the other 

 form of coloring, and the caudal tubercles were alike 

 in both forms. The anal shield and props of the green 

 form had patches of green. 



The caterpillars fed for five days, growing large 

 very rapidly; then the green ones grew dingy and 

 stopped eating, and the brown ones grew lead-colored 

 on the dorsum; and both kinds curled up in horse- 

 shoe shape, grew moist, and pupated six days later, 

 with no fourth molt. Probably this omission of a 

 molt was due to the intense heat, for several species of 

 caterpillars feeding at this time molted but three times 

 before pupating. 



The caterpillars were very excitable and reared the 

 anal end in the air, brandishing it and vibrating it 

 like a snake's head, which it really resembled enough 

 to frighten birds. We have seen orioles try to pick 

 up an abhotii larva on our woodbine, and dart away 

 with a scream when it lifted its snake-like anal end 

 with the tubercle shining like an eye. The caterpillars 

 make a squeaking noise ; how they make it we do not 

 know. 



The pupse were an inch and an eighth long, not 



