AND THE MECHANIC ARTS. 



523 



ASSOCIATED CATEBPILLABS. 



Two Other forest insects which have been closely associated with 

 H. guttivitta in the present outbreak, should be described here. 

 One of these is known as the Striped Maple Worm {Anisota rubi- 

 cunda Fab.). The adult worm is about two inches long, light 

 green in color, with white stripes down the side. It may be 

 easily distinguished from the preceding species Jay having at all 

 stages of its growth two large black spines just back of the 



head, and a series of 

 shorter spines along 

 the sides of the body. 

 This is by no means 

 an uncommon maple 

 pest, but seems to have 

 been more abundant, 

 than usual, this year. 

 In the valleys and the 

 more level sections of 

 the state this insect has 

 caused more destruc- 

 tion than Heterocampa, 

 especially to shade 

 trees. However, the 

 defoliation has in no 

 case been so complete. 



Another serious pest 

 during the past sum- 

 mer was the Spiny 

 Oak caterpillar {Ani- 

 sota stigma Fab.) This 

 worm resembles the 

 preceding very much, 

 but is of a dark brown 

 color. This is a well 

 known pest of the oak, 

 but has been somewhat more numerous this summer than usual. 



Pig. 43. The Spiny Oak caterpillar 

 (Anisota stigma), natural r-ize. 



EXTENT AND CAUSE OF OTJTBEEAK. 



The amount of damage caused by the attack of the Antlered 

 Maple Caterpillar has already been suggested. Thousands ot 

 acres of woodland in various parts of the state have been en- 

 tirely stripped of foliage, and other tracts more or less injured. 



