1972] 
Young — Hymenitis 
287 
instar is uniformly dark green after an initial feeding, although it 
is yellowish-white immediately after hatching. As it grows, a thin, 
dorso-lateral line becomes evident on each side of the body and the 
larva is about 6.5 mm long by the first molt. The second instar is 
lighter green and the head is translucent yellowish-green, and bears a 
small black spot ventro-laterally on each side. A dorso-lateral yel- 
low stripe separates the darker upper portion of the body and the 
lighter yellow-green ventral portion. There is also a medial dorsal 
stripe which terminates indistinctly anteriorly on the second segment 
and posteriorly on the ninth segment. The third instar (Fig. 2-6) 
is very similar to the previous one. By the third molt, the larva is 
about 12 mm long. The fourth instar (Fig. 2-D) is more decorative 
than previous instars. The head remains yellowish-green but now 
has acquired a second pair of black spots immediately above the first 
pair. The second pair of spots are considerably larger and triangu- 
lar in shape. The dorsal region of the body is a light, chalky green 
and is bounded laterally by a prominent double stripe (Fig. 2-D). 
The upper component of the double stripe is very dark green and the 
lower component is white, but the latter fades into yellow in the 
posterior one-third of each body segment. Each spiracle is bordered 
with a thin yellow line. This color pattern is retained in the fifth 
instar. The larva measures about 21 mm in length by 3 mm in width 
at the time of pupation. 
The pupa is about 10 mm in length and 9 mm wide dorso-ven- 
trally through the thoracic region. The cremaster is light red and 
the spiracles are bordered in light yellow. A few hours after forma- 
tion, the pupa becomes silvery in appearance with the wing pads be- 
ing entirely silver in color and anterior-ventral aspects as well (Fig. 
2-E, F). The dorsal region of the abdomen acquires two powder 
light blue stripes which taper towards the cremaster. The leading 
edge of each wing pad is dark red. Pupation in the field does not 
occur on the host plant. 
The adult female is figured in Fig. 2-G, including both dorsal and 
ventral aspects. The average wingspan for females in this population 
is 47.6 ± 0.4 mm (N = 16) and for males, 45 ± 1.1 (N — 
20). Sexual dimorphism in coloration is very weak, and both sexes 
have the same distribution of color. But coloration is more extensive 
in the female. The basic color of the non-transparent dorsal wing 
surfaces is slate gray with white spots; ventrally gray is replaced 
by dull red with the exception of the trailing edges of forewings 
(these being gray). A description of the adult is given by R. Haensch; 
in Seitz ( 1 924 ) , and in Fox ( 1 968 ) . 
