PAITLIO VIII. B. 
PAPILIO BREVICAUDA. 
Egg. — Spherical, flattened at base ; pale yellow. (Fig. a.) 
Young Larva. — Length .1 inch ; cylindrical, the anterior segments thickest, 
and a little arched ; color pale black ; a white patch on dorsmn, on segment 8 
and part of 7 ; the spines are in six rows, one sub-dorsal and two on either side; 
these are black and rise from pale yellow tubercles, each sending out a few black 
hairs; head black, pilose. (Fig. b.) 
After first moult: length .25 inch ; color black-brown, the patch white and 
extending well down either side; the spines as before, their bases pale yellow; 
head black, shining, with a white spot in front and one on either side. (Fig. c.) 
After second moult: length .4 inch ; color black, the patch as before ; white 
marks over the feet; the bases of the spines chrome-yellow; head as at previous 
stage. (Fig. d.) 
After third moult: length .8 inch ; color black, with narrow white stripes at 
the junctions of the segments; white also on the sides of 7 and 8, but not on 
dorsum ; white points on the last segment and over feet; the yellow at bases of 
spines is brighter; head as before. (Fig. e .) 
After fourth moult: length 1.1 inch, and reached 1.5 inch at maturity. 
Mature Larva. — Length 1.5 inch; cylindrical, slender, thickest at third and 
fourth segments, tapering slightly from four to last, and rapidly toward the 
head ; the surface smooth, the tubercles of previous stages being suppressed, 
except those of the two dorsal rows which are reduced and scarcely elevated, 
and under the glass are seen to have a pencil of very short hairs each ; when at 
rest the anterior segments are contracted and arched; the middle of each, from 
two to twelve, crossed by a black stripe or narrow band, broken on the middle of 
side after five; from four, divided a second time near its extremity, a triangular 
section being cut off on the posterior side; on thirteen the band is divided into 
three spots, the central or dorsal one being rounded; behind these are two sub- 
