48 THE CANADIAN ENTOMOLOGIST. 
the body. In Coézas, the embryonic animal is furnished with four rows of. 
peculiar appendages on either side of the body, three rows above the’ 
spiracles, each bearing one appendage to a segment, and one beneath 
them bearing two appendages to a segment ; these appendages are short, 
fleshy papillae, expanding from a slender base to a club-shaped ‘apex, as 
broad at its tip as the entire length. In the mature larva, all this is. 
wanting, but the body is profusely clothed with minute short hairs, seated 
on regularly-disposed delicate warts. 
Pieris is similar; the young larva is furnished with long, hair-like 
appendages, tapering slightly, but at the tip expanding mto a delicate 
club, and disposed much as in Co/as. In the mature larva, the body is 
furnished with two sets of minute warts, one arranged in regular transverse 
series and hairless, the other irregularly distributed and emitting each a 
short delicate hair. | 
In Papilio, the body of the infantine caterpillar is invariably more or 
less angulated, like that of the young Lycænid ; while, at maturity, it is 
always quite regularly rounded above the spiracles. It is furnished, when 
young, with several longitudinal rows of bristle-bearing tubercles, one 
tubercle to a segment in each row, one row in the middle of the side 
more conspicuous than the others. When full grown, the body is almost 
entirely naked in the species I have examined, being supplied only with 
smooth hairless, scarcely elevated, lenticular warts, or with irregularly 
distributed very minute wartlets, bearing inconspicuous hairs. In other 
species there are long, fleshy filaments upon the sides of the mature cater- 
pillar, but I have not seen the embryonic stage. In addition, the first 
segment is supplied with an osmaterium, which is wanting in early life. 
The “esperide@ strongly remind us of the genus Colas; for we find 
the body of the embryonic larva supplied with rather short fungiform or 
infundibuliform appendages, disposed in rows upon the sides of the body, 
and arranged as in the /zevin@,; while in the full grown caterpillar, the 
body is furnished only with short downy hairs, irregularly and profusely 
scattered. This furnishes an additional proof, of which many others are 
not wanting, of the close affinity of the Papilionide and Æesperide. 
We have thus passed in review most of the great groups of Æ/Xopato- 
cera,* and have substantiated, in a general way, the assertion made at the 
outset :—that there are greater structural differences between the embry- 
onic and adult stages of the same individual than can be found in the 
“Mr. Riley finds similar changes in Danais.—S. H.S. 
