64 BUTTERFLIES OF MAINE. 
of a leaf, on the under side, (Fig. 22, c.) Prof. Riley has 
described the early stages so admirably, that I give it in 
nearly his own language. The newly hatched larva is .9 of 
an inch in length, with a yellowish brown head, twice as large 
as the second segment, and distinctly bi-lobed. The second 
segment is also larger than the others. Each segment is 
divided by a transverse impressed line, and upon the top of 
each fold thus made, are four elevated spots, the forward ones 
being larger than the rest, (Fig. 22, 6, enlarged.) There is 
a sub-dorsal and also a sub-stigmatal row of similar, rounded 
warts, and they all give rise to little pale bristles or spines. 
The general color is pale yellowish-brown, mottled with dark 
streaks, especially below the stigmata. The second period 
scarcely differs from the first, except in the somewhat greater 
length of the horns. In the third period, the horns acquire their 
mature proportions, and the whole surface of the larva be- 
comes more granulated. In the fourth or last, the blue 
points appear and the lateral rows of tubercles lose their 
conspicuousness, to a great extent. 
| The mature lar- 
va, (Fig. 23, a,) 
is one inch and one- 
fifth long. General 
color, either whit- 
ish or olive green. 
Body thickly gran- 
ulated. Head, dull 
olive, with dense, 
i minute prickles ; 
Fig. 23. Limenitis disippus; a, larva; b, pupa; c, hiber- its vertex, bifid, 
naculum; d, leaf of willow as cut by the larva. and terminating in 
a pair of prickly, cylindrical horns, transversely arranged, 
and each about .3 of an inch long. Back, speckled and 
mottled with olive of different shades above the line of spir- 
acles, except segments three and nine, and the upper parts of 
eight and ten, but with a continuous, pure white line below 
the spiracles, beneath which line, on segments five to eleven, 
