4 Journal New York Entomological Society. [Voi.xvi. 



7.30 P. M. All quiet now and evidently preparing to moult. 



Note. — When about to moult the skin breaks just back of the head 

 and gradually works backward ; I have never been able to detect the 

 slightest motion on the part of the caterpillar during the process of 

 moulting. The head covering separates from the skin and is pushed 

 forward, coming off like a little cap ; it often remains on the head until 

 the skin is nearly or quite free from the body. After the moult is com- 

 pleted they rest for some hours before beginning to feed. 



August 28. 8 A.M. Nearly all have moulted this morning. The 

 hair is somewhat thicker and longer than at last moult, also the color 

 is somewhat darker and the yellow lines more distinct. 



7.30 P. M. Moult complete and the caterpillars eating rapidly. 

 Body color much darker than this morning. Hair so long that the 

 larvas look almost shaggy. 



August 31. The caterpillars have been very active all day and 

 have fed heavily. A considerable increase in size is to be noticed. 

 The color is getting darker. 



September 2. Fed heavily last night ; no change perceptible. 



September 3. 6.30 A. M. The first stage of the third moult 

 has begun. The skin has broken away from the head and the lobes 

 of the new head have begun to push themselves out. The caterpillars 

 are in a compact mass on a stem and are motionless. 



7.30 P. M. Moult complete. The caterpillars were bright red 

 when they first emerged but turned brownish black within two hours. 

 The hair is long and quite shaggy. 



September 4. Feeding heavily and growing proportionately. 

 Body color quite black, accentuating the yellow of the lines. The 

 hairs are quite white and much more conspicuous than heretofore. 



September 7. Caterpillars stopped feeding this morning and are 

 about ready to cast their skins. The skin has broken just back of the 

 head, and the new head appears as a slight swelling between the old 

 skin and the old head covering. 



September 9. Caterpillars completed the moult last night and are 

 now of a deep black color, slightly tinged with brownish. Stripes 

 yellow tinged with green. Head black and shiny. Hair white and 

 quite long. They are eating but sparingly. 



September 13. Caterpillars the same in appearance as at last 

 observation ; not feeding much this morning. During the last few 

 days they have eaten voraciously. They have grown in length and 



