On the 14th May last I found several eggs of archippus on milk weed. These hatched on the 17th inst. on the 19th all had passed first moult. on the 21st all had passed second moult. Onthe 22nd two passed third moult. On the 25th these two passed fourth moult, and were one inch long. They continued to grow till the 29th, when they measured 1.8 inch, and in the morning had fixed for chrysalis.