256 
MEMOIRS OF THE i^ATIOXAL ACADEMY OF SCIENCES. 
Last stage.— In a blown full-grown larva received frojii Professor Riley the body is cylindrical, 
smooth, and the bead is small and rounded, with no traces of warts on the head, which is slightly 
bilobed. The prothoracic and first alid eighth abdominal segments are normal, with no piliferous 
tubercles, not even on the segments specially named. The anal legs are long and slender, but no 
longer than the body is thick. 
The body is green, of the hue of the leaf it feeds on; along the back is a broad whitish yellow 
baud, edged with reddish. There are no snbdorsal or lateral lines or other marks. 
KECAPITULATION. 
1. In Stages I and II we have the high prothoracic tubercles like those of M. martliesia in its 
fourth stage. 
2. There are no subdorsal or lateral lines in the last stage, and, as in the movements 
of tlie anal legs must serve to deter its enemies from attacking it, being otherwise protected by 
its color, which is like the leaf on which it feeds. 
It is evident that by their larval characters this species and marthesia are closely allied. 
Cocoon . — “A loosely woven silken cocoon under or among the leaves and other rubbish upon 
the ground.” (Popcnoe.) The i>upa is fully described by Dyar in Psyche, vi, ]}. 96. 
Habits . — Thanks to Professor Popenoe, * we have the fullest account yet published of the habits 
and transformations of this species. It is at times destructiv^e to the sycamore. The eggs are laid 
in close groups of from fifteen to seventy-five upon the iinderside of the leaf of the sycamore.” It 
appeal's that the “newly hatched larvm fora time feed in company upon the leaf pulp,” and in 
the first stage when disturbed fall or spring off’ and hang suspended by a silken thread. It is to 
be noticed that the larva “ forms a loosely woven silken cocoon under or among the leaves and other 
rubbish upon the ground.” 
As the larvic grow they no longer feed on the pulp of the leaf, but devour the woody parts 
and veins, when their work, becomes more noticeable. When nearly fully fed the majority of the 
larvic are yellowish green, marked with red as at c, but in the same brood, says Popenoe, “there 
will occur other larvre (d) lighter in coloration, but transforming into moths indistinguishable from 
those produced by the darker form,” and “the differences in coloration in the adult larvm have no 
relation to the correspondingly great variation in the moths, so far as was observed.” “In eastern 
Kansas,” says Popenoe, “the larvm occur in two broods each year, the first brood appearing in early 
June, the second in the first week in August. The larvm of the first brood reach their full size in 
the early ])art of July; and within the shelter of the cocoons which they spin when full grown, the 
transformation to the pupal state is effected. The summer moths soon appear, and after the pairing 
the females lay the egg.s which produce the second brood of Jarvm. The larvm of this brood 
’ mature toward the end of August, and, having spun cocoons about themselv^es, pass the winter 
unchanged, the pupal state in this brood not being reached until the following spring, a short time 
before the appearance of the spring moths.” 
From Professor Popenoe’s table showing the series of changes, it ai)pears that at Manhattan, 
Kaus., for the first brood, the eggs being deposited June 11, the length of the egg state is four 
days; of larval Stage I, four days; II, three days; HI, two days; IV, four days; it remained six 
days in the last stage (Y), and Avas inclosed in its cocoon ten days before the pupa was seen. 
In the second brood, the eggs being deposited July 27, the duration of the egg state was about 
four days; Stage I, three days; Stage II, three days; Stage III, three clays; Stage lY, five days; 
Stage Y, four days. 
The larvte occur in March, July, August, and September, the moths flying in May, June, and 
August (Riley MS.). 
— Sycamore (Riley, Pilate, Popenoe). 
Geographical distribution . — Its range extends over the Appalachian and eastern borders of 
the Campestrian subprovinces, and with little doubt will be found to occur throughout the 
Austroriparian. 
' First Annual Report of the Kansas Experiment Station for 1888, Rep. Dept. Hort. ami Ent,, p. 35. The illus- 
trations were drawn by Mr. C. L. Marlatt. 
