l62 



DESCRIPTION OF THE PREPARATORY STAGES OF 

 PAPILIO ZOLICAON, Boisd. 



Bv W. H. Edwards. 



Egg.— Spherical; smooth; color yellow-green. Duration of this 

 stage about ten days. 



Young Larva. — Length .i inch; cylindrical, the anterior segments 



somewhat thickened, the back and sides tapering to 13; when at rest 



the dorsum is hunched, the head bent down; color black; on 7 and 8 



a gray-white dorsal patch, sometimes mottled with black; this patch is 



irregular, but does not descend below the middle row of tubercles; 



some larvae have a litde mottling with white on dorsum of 11 to 13, or 



perhaps one or two segments only, and some have one or two white 



dots on 2 and 3 in line with the upper row of tubercles; the tubercles 



form three longitudinal rows: one sub-dorsal, one on mid-side, one 



infra-stigmatal; these run from 2 to 13, on 2 the tubercles of lower two 



rows being below the lines; the sub-dorsals are large, slender, tapering, 



those on 3 to 5 and 11 to 13 larger than the rest and of about equal 



size; from the apex of each rises a long straight black hair knobbed at 



extremity, and five or six shorter hairs are irregularly placed about the 



sides on the upper half; the next two rows are of rounded knobs; on 



the middle one the knobs on the anterior segments give out four hairs 



each, but after 3, three hairs; on 2 and 3 the hairs are turned forward, 



but on the remainder are erect; the knobs of lower row are smallest of 



all, except on 2 and 3, where they equal in size those of the middle 



row; the hairs as in that row, but after 3 all are turned down; on the 



anterior side of each knob, and a litde above it, are two hairs to each 



segment; along base of body a tuft of hairs on each segment from 3 to 



12; between the sub-dorsals are two rows of dny points, from 3 to 12, 



each with one short hair, but on 11 and 12 the hairs are wanting; feet 



black; pro-legs greenish brown; head rounded, somewhat flattened 



frontally, bilobed, the vertices well rounded; color shining black; beset 



with many black hairs from fine points; the scent organs or tubercles 



from 2 are stout at base, slender, tapering to a point and bent like an 



ox-horn; color pale yellow. Duration of this stage four days. 



After first Moult: length .16 inch; similar shape; color black-brown; 

 on 8 the dorsum and side are white; on 7 partly mingled with black, 

 but sometimes 7 is white also; on the side of 11 and 12 are usually two 

 or three small white patches, but sometimes there is but one on 10 and 



