es eee 
REPORT OF THE STATE ENTOMOLOGIST 1907 21 
TOG IAG, 13, 1s IN, W. Stave Mite, Iie, S) aaggyasiss  ((Sitinamlenny 
account) 
1907 Patch, E. M. Me. Agric. Exp. Sta. Bul. 148, p. 263. (Defoliating 
maples, as Dryocampa) 
Antlered maple caterpillar 
Heterocampa guttiwitta Walk. 
The curious larva of this species is a somewhat general feeder 
and has attracted more or less notice because of its. variable 
coloring and somewhat remarkable structure. It does not seem 
to have been hitherto recorded as a destructive leaf feeder. This 
species was associated with the green striped maple worm, 
Anisota rubicunda Fabr. in defoliating extensive areas 
in the townships of Berlin and Stephentown. An idea of the 
extent of the injuries may be gained by reference to page 13. 
Caterpillars of this form must have been rather abundant, as a 
number were sent in with the Anisota larvae August 12, despite 
Miem fact thate they, were then mttch “smaller than this better 
. known form. This species was also very destructive over large 
areas of maple and beech forests in Maine and injurious to 
apple trees, as recorded by Miss Patch. 
Description. The following characterizations of the various 
Stages have been drafted very largely from Packard’s extended 
descriptions. | 
Adult. Vhe parent insect is a rather heavy, pale olive-gray 
moth with a wing spread of 1% to about 2 inches. The wings 
are variably marked with white scales and patches and darker 
scallopings. 
Larva. The recently hatched larva of this species is less than 
3/16 of an inch long, dull reddish and most remarkable on account 
of the nine dorsal pairs of chitinous processes, much resembling 
the antlers of deer, the anterior horns arising from the segment 
just behind the head. The anterior pair each have four long, 
curved horns, while the others are smaller and simpler. This 
curious armature disappears after the first molt and there are 
then evidences of longitudinal stripes. Successive molts result 
in great variations in color, in the third stage the ground color 
being yellowish gteen and marked by a broad, median, reddish 
brown stripe, which latter has conspicuous dilations on the third 
abdominal segment. Subsequently the markings become lighter, the 
larva being mostly light green with variable reddish brown mark- 
