October 1S91.] 



PSYCHE. 



159 



red streak, then a black dot near the 

 centre of the top, the dot being the 

 head of the larva. On June 29th, they 

 hatched. 



The young larvae were of a dull white 

 color, with a black dorsal patch on the 1st 

 segment, and a black dot below this on each 

 side. The other segments had, on each side, 

 two large black dots and a small one set in a 

 triangle, and a smaller dot on the stigmatal 

 line. Anal shield black. Head became 

 black. Feet black ; props white; anal props 

 dotted with black, very slender. Sparse 

 black hairs all over the body. The black 

 was very shining. 



The larvae fed and rested in a close 

 crowd. They were very active, mov- 

 ing very rapidly. They ate only the 

 green pulp of the leaf, and wanted 

 much water. July 3rd, they spun a 

 web on the leaf and all settled on it in 

 rows. 



July 5th, First moult. Head very large 

 and black, conspicuous. Body as before, 

 except that the sparse hairs were partly 

 white, partly black; and the 2nd and 3rd 

 segments had each two large black warts on 

 each side of the dorsal line and one on the 

 stigmatal line; anal segment had two large 

 black warts instead of being all black. The 

 spiracles were black, and showed clearly. 

 The white color of the body was an opaque, 

 glossy white, like porcelain, and the 2nd and 

 3rd segments looked very white, having 

 fewer black marks than the others. The 

 hairs were longest near the head, and pro- 

 jected over it. On July 10th they spun a 

 web for moulting. 



July 1 2th, Second moult. As before, but 

 larger, and with the hairs longer and denser. 



The larvae lived now in two crow r ds, 

 one on each side of the hickory leaf 

 which I substituted for the thorn, and 



still ate only the pulp. On July 16 

 they spun a web on each side of the leaf. 



July iS, Third moult. Head round, 

 slighth' bilobed at top, shining black. 

 Body as before except the hairs. 1st, 2nd 

 and 3rd segments as before. 4th and 10th 

 segments had a longer pencil of black hairs 

 arising from the black wart nearest the dorsal 

 line, on each side, the hairs meeting over the 

 line so as to give the effect of a single pencil. 

 On each side, lower down, was a longer, 

 single pencil, also black. The other seg- 

 ments had the dorsal double pencil, and all 

 had longer white hairs on the sides, these 

 being longest over the head and anal seg- 

 ment. 



The larvae now began to eat through 

 the fibre of the leaves, and on July 

 21st, spun a web. 



July 23rd, Fourth moult. As before, but 

 larger. July 28th, spun a web. 



July 30th, Fifth moult. Head, feet, 

 props and venter black. Body more speckled 

 with black, the ground color being greenish 

 white. Short, thick, white pencils on each 

 side of the dorsal black ones, lay close against 

 these, and formed with them a convex ridge 

 along the dorsum. The lateral hairs were 

 less dense and longer. Two thin long, white 

 pencils on 1st, 2nd, nth and 12th segments, 

 the first two pairs extending over the head, 

 the last two over the anal end. 



The larvae ate enormously and 

 moved very fast. When touched vigor- 

 ously they curled up and rolled oft' the 

 leaf, but did not mind being jarred or 

 moved. Aug. 5, spun a web. 



Aug. 7th, Sixth moult. Length i| inches, 

 though two or three measured 1^ inches. 

 The hairs were denser on the dorsum, 

 and had a grayer tinge. Otherwise as 

 before. 



Aug. 16. They measured 1^ inches 



