REPORT OF THE STATE ENTOMOLOGIST IQO/ 21 



1906 Felt, E. P. N. Y. State Mus. Mem. 8, 2:537-38. (Summary 

 account) 



1907 Patch, E. M. Me. Agric. Exp. Sta. Bui. 148, p. 263. (Defoliating 

 maples, as Dryocampa) 



Antlered maple caterpillar 



Hcterocampa guttivitta 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 

 the fact that they were then much 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. The parent insect is a rather heavy, pale olive-gray 

 moth with a wing spread of i^ 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 green 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- 



