246 
[Vol. VI. 
Journal New York Entomological bociETY. 
Stage VI .—Shape as described. Absolutely smooth, finely clear 
granular, the granules low, rounded, contiguous, but not appressed, 
without a trace of the rosette spines. Depressed spaces rather small, 
but sharp, the latticed ridges not less than five granules wide. Spaces 
very finely granular in the bottom; (i) flat before, with green glan¬ 
dular center, (2) rounded, highest in the center, (4) elongate. Pale 
yellowish-green, shading to nearly colorless on the lateral ridge, the 
dorsum and upper part of lateral area on joints 6 to n distinctly 
spotted with emerald green pigment. A narrow yellow sub-dorsal 
line, straight, but slightly crinkly edged, on joints 4 to 13, the pair 
free and uniform (Plate XI, Fig. 10), or partly or wholly connected 
by a yellow bridge, usually with a small red spot (Plate XI, Fig. 8), 
or rarely a rather large one covering joints 7 and 9 and widened on 
joint 8 (Plate XI, Fig. 9). The red spot varies in color from vermil¬ 
ion red to light blue or dark slaty blue, edged with crimson. On 
joint 3 in front, a transverse yellow line, edged with crimson below. 
A series of red spots usually appears, beginning on the collar in front 
and extending to joint 5, not discoloring the dorsal depressed spaces. 
The spots are dull and diffuse. At the end of the stage the pigment 
is all dissolved and the larva appears entirely transparent, dirty whit¬ 
ish or waxy greenish, the internal organs visible in motion. It eats 
for only a short time in this condition, and leaves the twig to spin. 
Length, 4.8-8.2 mm., in some large larvae suddenly increased to 
13.3 mm. at the end of the stage by the degenerative change in shape 
accompanying the loss of the pigment. 
Cocoon as usual, elliptical, very small. The larvae do not leave 
the tree, but spin in the crevices of the bark. 
Food plants. Black oak, chestnut, beech, iron wood. 
EXPLANATION OF PLATE XI. 
Fig. 1. Larva, stage I, side view enlarged. 
“ 2. Two of the Y shaped setae more enlarged. 
“ 3. Young larva, stage III, dorsal view. 
<< 4. A section of the skin granules, back and sides, stage III more enlarged. 
“ 5. A single skin granule with rosette spines, top and side views. 
“ 6. Mature larva, front view. 
“ 7. The same side view. 
<< 8. The same, dorsal view, the usual colorational form. 
“ 9. The same, showing the largest red spot seen. 
n jo. The same, showing the absence of the red spot. 
“ 11. Moth of Heterogenea shurtlepfH $ , suffused form. 
“ 12. The same, 9 , normal form. 
