THE BROWN-TAIL MOTH 



115 



of the body. Ou 

 the middle line 

 of both the 

 ninth and tenth 

 segments is an 

 orange or coral- 

 red retractile tu- 

 bercle. These 

 details may be 

 seen in figure 9. 

 In about eight 

 days the cater- 

 pillars shed 

 their skins or 

 molt, after which 



Fig. 12. — Various forms of 

 Tail Moth caterpillar. 

 Kirkland."* 



Fig. 11.— Full grown caterpillars of Brown-Tail 

 Moth; enlarged 1| times. 



they are about two 

 fifths of an inch long 

 (Fig. 10), the body 

 hairs are relatively 

 longer, though the 

 tufts on the fourth 

 and fifth segments 

 are not so large. 

 About the middle of 

 May (15th to 20th), 

 the second spring 

 molt occurs. The 

 caterpillar is now 

 about three fifths of 

 an inch long, the yel- 

 low markings of the 

 body being more ap- 

 parent, and the brown 

 tufts on the back less 

 prominent. In this 

 stage the upper hairs 

 of the tubercles along 

 the sides of the ab- 



liairs from Brown- 

 (After Fernald and 



