15 
0.14 millimetres, respectively. The general color of the body is white, 
with a yellowish tinge j head, black ; a black or brownish shield-shaped 
spot on the dorsal surface of the first segment. 
Soon after they begin feeding the larvae turn darker and before the 
first molt are usually of a deep rose or brownish color. The piliferous 
tubercles are not yet very prominent. The true legs at first are slightly 
Fig. 2. — Heliothis armigera : a, egg from side ; b, do. from 
top — enlarged ; c, full-grown larva ; d, earthen cell with con- 
tained pupa; e, moth -with wings spread; /, do. at rest— nat- 
ural size (after Riley). 
dusky, but soon turn much darker, are hairy and provided with a small 
bifid claw. At first the first pair of prolegs seem to be a little less 
robust than the others, and hence may be slightly weaker. Obscure 
dark lateral patches are found on the prolegs, which at this stage are 
further provided with fine small hooks. 
By the time of the first molt the worm has attained a length of 5.62 
millimetres and is slightly larger in the middle. 
After the first molt the larva is at first of a yellowish color, but again 
turns darker rapidly when it begins feeding. The true prolegs become 
much darker, and at their insertion next the body a small dusky spot, 
both anteriorly and posteriorly, is found. The dark lateral patches on 
the prolegs are also more distinct, each proleg being now provided with 
nine small hooks. 
By the time of the second molt the larva measures 7.75 millimetres 
in length and is still a little wider in the middle. 
Soon after the second molt the worm measures 8.75 millimetres in 
length. The most noticeable changes are, that the piliferous tubercles 
are now much more prominent ; that the very small tubercles found 
thickly scattered all over the body first become quite discernable to 
the naked eye. 
