170 CATERPILLARS AND THEIR MOTHS 



were very slender in proportion to their length. When 

 at rest they stood on their anal props and reared their 

 bodies in the air, curving them somewhat like a ques- 

 tion-mark reversed (f). They were of just the color 

 of the under side of the ash-leaves. The head was 

 large, pointed, and had whitish face-lines. The sub- 

 dorsal line was confined to the first three segments. 

 The last pair of obliques were yellow. The body was 

 blue-green on the dorsum, yellow-green on the sides, 

 and blue-green on the venter, the division being quite 

 distinct. The horn was quite long, straight, pointed 

 backward, pink, and covered with darker spines. 



Four days later they molted for the third time. 

 The head was green, somewhat triangular, with heavy 

 white face-lines, granulated. The thoracic segments 

 were covered with white granules, the anal segment 

 having dark ones. The obliques were light yellow, 

 edged above with dark green, the last pair growing 

 very white. The horn was pinkish, with dark granules 

 at the tip and on the front and back, and light ones on 

 the sides. The legs were green, with pink tips. The 

 spiracles were dull red, with a white dot at each end. 



The fourth molt was nine days later. The head was 

 triangular, large, and darker than the blue-green body, 

 and had white face-lines, pinkish near the mouth. Both 

 head and body were smooth now. The skin seemed to 

 be in folds on the body. The obliques were white, 

 the legs and props as before. The horn was pink and 

 rough. The spiracles were dull red, with a yellow line 

 down the middle. 



The caterpillars fed for ten days after this molt, 

 then turned lead-colored and stopped eating. The 



