t)yar.] 
894 I Nov. 7, 
DESCRIPTIONS OF CERTAIN LEPIDOPTEROUS 
LARVAE. 
BY HARRISON G. DYAR. 
Family X < >T( )D o xtid a k . 
LoPHODOXTA FERRU(;iNEA Packai'd. 
Egg. — Laid singly, usually on the upper side, near the middle, of the leaf 
of its food plant (Betula papyrifera). Rounded, somewhat flattened, about 
the shape of two thirds of a sphere with flat base ; diameter 1 mm., height 
0.6 mm. Slightly shining, fine turquoise-blue or more rarely of a greenish 
blue tint. Microscopic reticulations neatly defined, but rounded, scarcely 
angular, becoming small and indistinct at the micropylar region. (In the 
sides the reticulating edges of the cells become broad, fiat, almost like bands, 
reducing the enclosed depressions to shallow pits. Found duriniz: the early 
part of July at Keene Valley, Essex Co., New York. 
First larval stage. — On hatching the larva leaves the shell largely intact 
and takes up a position at the extreme apex of the leaf where it eats the 
upper epidermis and parenchyma. Head cordate, entirely shining black ; 
width 0.6 mm. Body rather bright gi-eenish yellow, thoracic feet black, 
cervical shield transverse, dusky. Setae fine, short, black, distinct but with- 
out evident tubercles ; not glandular ; 1 and 2 nearly in line, 3 above spiracle, 
4 substigmatal posteriorly, 5 subventral anteriorly, 6 absent as usual in the 
first stage. Feet all used ; leg plates concolorous with the body. No anal 
plate. Length about 3 mm. 
Second stage. — The larva eats away the substance from the midrib of the 
leaf at the apex, using the midrib as a perch on which it rests. Head 
slightly bilobed, greenish ; a smoky black shade covers the side including 
the ocelli, and a narrow smoky band reaches the apex in front of the lateral 
angle ; mouth brown ; a few setae ; width about 1 mm. Body cylindri- 
cal, smooth, feet normal, all used. Thoracic feet and leg plates black 
except the anal pair. Setae short and fine, dai'k, from minute black tubercles, 
very inconspicuous ; arrangement normal, 6 present. Body green with very 
faintly indicated addox'sal, subdorsal, lateral, and superstigmatal waved 
whitish lines. Spiracles pale. 
Third stage. — Head rounded, flat before and held out flat ; leaf-green ; 
a smoky black band behind ocelli extends backward and upward to the side 
of tiie head where it ends tapering ; mouth reddish ; width 1.6 mm. Body- 
as before, but the fine dark setae have no tubercles. Color pale leaf -green ; 
on joints 2-3 a yellowish line edge^ above with red extends up from below 
the spiracles to the lateral line. Very obscure lines as before, waved, 
whitish. Thoracic feet black except at joints, abdominal ones all green, the 
claspers smoky. Spiracles reddish centered. Later there is a broken 
obscure substigmatal line, composed of oblique, pulverulent, yellowish 
