LIBYTHEA. 
Egg. — Color pale green ; in shape an oblate spheroid, somewhat pointed at 
base and a little truncated and depressed at summit; marked by many horizontal 
corrugations, and longitudinally by eighteen to twenty narrow, prominent ribs 
w nr i proceed from base and terminate, some of them irregularly, at about four- 
hfths the distance to summit, while eight, increasing gradually in prominence, 
terminate abruptly at the rim of the summit, which is flattened as in Graptci • 
these long ribs cut on either side, as in Grapta, by grooves perpendicular to the 
sui ace o t le egg, they are also frequently deflected somewhat from a direct 
line. (Fig. a.) 
Another egg, within one day of the appearance of the larva, differed from the 
above; the length being sensibly increased by the flattening of the corrugations 
and, at the same t.me, the transverse diameter enlarged from the unfolding of 
he nbs, which had become scarcely more than lines upon the surface. (Fi<f b.) 
le Larvae emerge from the egg in four days; in length .06 inch ; greenish- 
brown, translucent, covered with fine hairs. Of the first moult I am unable to 
speak, but after passing the second, in four to five days from the egg, they are 
-e mch in length, slender, cylindrical, entirely one shade of dull green, some¬ 
what pilose, each segment transversely creased ; two days later the third moult 
takes place; length .6 inch; head pale green; body velvety-green, with a pale 
dorsal line and a faint, whitish, lateral stripe from second to last segment; each 
segment creased and marked by rows of whitish, tuberculated points; under side 
and legs pale green. 1 5 e 
V i Th t MATUEE ^ AE T A is , 0ne inch ,on ° ; head Globed, pale green; body dark 
e ve y-green; the dorsal line distinct, yellow ; the lateral stripe yellow, as are 
also the tuberculated points; on the side of third segment is a black poi^ 
under side and legs pale green. ^ ’ 
Another larva, after third moult, was marked as follows: the dorsum dark 
g.een, edged on either side by a gray line, and successively by a band of yellow 
another gray me and a black band to the legs; the third segment wholly"black! 
i ,, Pa | 1 m , y; the entlre u PP er surface finely tuberculated with "yellow : 
pro- egs i aek; legs pale green. The markings were similar after fourth moult ’ 
,7 °, i arV£B " 7 ° green ’ With a Iateral b,ack band above ‘he feet, and a 
few black patches on third and eleventh segments. 
Chrysalis. — Length .5 inch; sub-triangular, compressed laterally; head case 
square; mesonota process rounded, prominent; color blue-green ; a feint yellow 
dorsal line passes from last segment to middle of body, where it forks, sending a 
branch along each wing cover to the top of head case and meeting; there is also 
a lateral yellow line from end of last segment to edge of wing cover- the ab- 
m,n.d segments marked by many whitish tubercles. Time from laying of eo-o 
to appearance of the imago sixteen to seventeen days. ° °° 
