THE SWEET-POTATO LEAF-FOLDER. 3 
The following synonymy is recorded : 
Phalaena tripunctata Fabr. 1794. 
Botys cubanalis Guen. 1854. 
Botys memmialis (F.) Walker. 1859. 
Pilocrocis tripunctata Fabr. (Hampson). 1898. 
DESCRIPTION OF STAGES. 
THE EGG. 
(Fig. 1, &.) 
Thin, scalelike, with delicate walls, reticulated on upper surface; more or 
less regularly elliptical in outline, especially when laid singly. Being very 
plastic, the eggs vary considerably in shape. When laid the egg is at first 
colorless, practically transparent, and later the developing embryo can be seen 
plainly within. Measurements of 10 eggs that had been deposited singly : 
Average length, 1.06 mm., average width, 0.79 mm. 
THE FIRST LARVA STAGE. 
Of a number of larvae examined, none of which was more than 24. hours 
old, the smallest measured about 1.5 mm. in length. The width of the head 
shield of all these individuals was very constant, about 0.25 mm. 
Newly hatched larvae are opaque, colorless, except for the dark, reddish- 
brown ocelli and the mouth parts, which are tinged faintly with brown. The 
body is cylindrical in shape, the surface smooth, glistening, with the setae arising 
from colorless tubercles. In these newly hatched larva? the head and legs are 
comparatively large, noticeably out of proportion to the rest of the body. After 
emergence from the eggs, however, the larvae begin to increase rapidly in size, 
and this lack of proportion is soon lost. When .the larva? begin to feed the 
chlorophyll taken into their bodies imparts to them a greenish tinge. 
LATER LARVA STAGES. 
(Fig. 1, c, d; fig. 2, a, &.) 
During the succeeding instars the shape of the larva remains cylindrical, 
the surface smooth and glistening. In the third and subsequent instars tubercle 
ii of segments 3 and 4 x is usually conspicuous because of its brownish or 
blackish color. Sometimes, however, especially on segment 4, the tubercle is 
not dark. 
When at rest the full-grown larva measures, immediately after feeding, 
about 27 mm. in length and 5 mm. in width. Measurements of the width of 
the head shields of 10 individuals gave an average of 1.81 mm., ranging from 
1.75 mm. to 1.88 mm. The general color of the larva is bluish green. The 
head (fig. 4) is pale yellow, and the ocelli, tips of the antennae, mouth parts, 
and claws of the true legs are brown. 
THE PUPA. 
(Fig. 1, e; fig. 2, c.) 
The pupa is dark brown in color, somewhat lighter toward the posterior 
end. The surface is smooth, that of the abdominal segments dull and the re- 
mainder glistening. Eight bristles, curled at their tips, occur at the end of 
the cremaster. 
Five pupae averaged 15 mm. in length and 4 mm. in width at the widest point. 
1 The head is considered as segment 1, the prothorax as segment 2, and the others 
in succession. 
