March, igoi.] SeIFERT : LiFE HlSTORY OF PlATYSENTA. VIDENS. 17 



less profuse and hence the green color more vivid. Legs concolorous 

 with body, thoracic legs almost translucent, abdominal ones tipped with 

 pink near the feet. 



During this period, between fourth and fifth moult, the larvae com- 

 mence to appear in different variations ; from the most abundant 

 (about 75 %) green form through all shades of olive-green to choco- 

 late brown. The lines, stigmatal band, oval spot on hump, confluent 

 dots and white discs around setae are permanent. The rose-colored 

 markings of stigmatal band are rarer with the brown varieties. The 

 head varies according to the color of the larva, lighter or darker 

 shades — always lighter than the color of the body ; the brown streaks 

 are unaltered. June 17th some of the larvse passed their fifth moult. 



Sfage VI. — In about six days they attain their maturity, measuring 

 about 35 mm., width of head 2.15 mm., first segment posteriorly 

 2.75 mm., third segment posteriorly 4.0 mm., width of eighth segment 

 4. 25 mm. The larva tapers towards head from third thoracic segment ; 

 abdomen almost cylindrical, eleventh segment moderately hunched. 

 Head pale green, with a black, narrow, lateral band on each side end- 

 ing, pointed, between base of antenna and upper lip. On both sides 

 of the black band following this in its extension, the green color is 

 changed to opaque greenish white. Mouth parts sordid whitish, semi- 

 transparent. Ocelli black ; base of antenna pale, translucent greenish 

 white, tipped above with rose color, with a brown spot at the joint 

 and dark brown at the end. Below ocelli, continuing from stigmatal 

 band, the buccal region opaque greenish white, often with brownish 

 dash above. Head not entirely smooth ; clypeus with fine transverse 

 furrows, the other part of head very minutely shagreened. Setae 

 scanty, but longer than those on body. 



The larvae grow very rapidly during this period and are subject to 

 much change in the ground color, which at the beginning of this in- 

 star is rather vivid yellowish-green, but turns towards maturity to a dull, 

 more bluish green. The dorsal vessel modifies this region by a darker 

 green, obscuring the dorsal line more or less ; sub-dorsal and lateral 

 lines mostly indistinct but traceable and always very clear and plain 

 on thoracic segments. Segmental incisures narrowly but distinctly 

 ringed with yellow, but this is only visible when the larva leaves its 

 outstretched position, feeding or moving, and contracts the somites, so 

 that the skin becomes folded and compressed at the sutures. Stigmata 

 pale ochre with black rim. From head to anal legs extends a broad 



