238 Lili.in J. Gould's c.rperimentfi 



Aug. 5th. — The horn of the first larva had acquired a 

 dark rough dotting on the upper surface near the hase ; 

 the tip and under side were still green. Shagreening 

 appeared. 



Aug. 6th. — The horn of the first larva became yellower ; 

 the dotting remained the same and became no darker. 

 The length of the larva at this time was 9 mm. 



Aug. 9th. — The first ecdysis of the second larva occur- 

 red ; the horn changed to pure green as in the first 

 larva. Shagreening appeared. The head was brighter 

 green than the rest of the body. No subdorsal line. 

 The horn of the first larva was now reddish at the base, 

 but not darker towards the tip, and the under side of it 

 was quite light and greenish still. 



Aug. 11th. — The first ecdysis of the third and fourth 

 larvfE took place ; the horn in both changed to pure 

 green as in the others. Shagreening appeared. No sub- 

 dorsal line. The second ecdysis of the first larva occur- 

 red ; there was scarcely any change, only the oblique 

 stripes became primrose-yellow and more distinct, and 

 the horn blacker on the upper surface. The apex of the 

 triangular head was very slightly bifid. The length of 

 the larva was Ij cm. 



Aug. 22nd. — The third ecdysis of the first larva took 

 place. A perfect row of nine reddish-yellow spots ap- 

 peared. Eight were in the position of the spiracles, and 

 one on the supra-anal plate. They were present on 

 the thoracic segments, and the first to eighth abdominal. 

 Spots 1 — 10 were spiracular in position, and those on 

 the abdominal segments were posterior to the oblique 

 stripes. The spot on abdominal segment eight was the 

 brightest and most distinct, and next in distinctness 

 was that at the base of the horn; towards the head they 

 became less bright, though still distinct. The length 

 of the larva was 2^ cm. The horn was less dark on the 

 upper surface, and there was a very distinct red line on 

 each side of the base ; the ground colour was greenish 

 yellow. The oblique stripes were primrose-coloured ; 

 they were never at any time white or "whitish" as 

 described by Prof. Weismann, but distinctly pale yellow. 



Aug. 24th. — The second ecdysis of the third and fourth 

 larvae. The change in appearance was exactly the same 

 as in the first and second. 



Aug. 25th — Sept. 2nd. — I was absent from home, and 



