THE BROWN-TAIL MOTH. 45 



darker brown, and has light-brown hairs scattered over the 

 surface. These hairs arc finely barbed, and similar in struc- 

 ture to the long ones arising from the tubercles of the body 

 (Plate 9, Fig. 4). They are nmch shorter, however, the 

 longest being half the width of the head. The basal seg- 

 ment of the antenna? and palpi is sordid white. 



The body is dark brown or black, with numerous mark- 

 ings of a dull yellowish color, sometimes inclining to a dull 

 reddish. These markings are as follows : the thoracic and 

 anal shields, the latter often more or less dark brown in the 

 middle ; two parallel, irregular and more or less broken 

 lines along the middle of the back, represented on the an- 

 terior segment by two rows of spots of variable size ; a 

 small space around each of the tubercles ; many short, irreg- 

 ular, transverse streaks, most numerous on the sides and 

 beneath. A cluster of reddish-yellow, finely barbed hairs 

 of unequal length arises from each tubercle, while the sub- 

 dorsal and lateral tubercles on segments 5 to 12 inclusive 

 are thickly covered with fine barbed hairs (Plate 9, Fig. 3), 

 which give these tubercles a dark-brown color and the ap- 

 pearance of velvet, under a lens. These are the " nettling 

 hairs." There is a fleshy, retractile, coral-red tubercle on 

 the middle of the back of segment 11, and a similar one in 

 thcf same place on segment 12. In one example these tuber- 

 cles were abnormal in size and position, one being larger 

 than usual, a little to the left of the dorsal line, and between 

 segments 10 and 11 ; Avliile the other was less than half as 

 large as the first, and on the right side of the dorsal line, 

 more than twice as far from it and slightly farther forward 

 than the other. 



The legs are dull reddish-yellow, with the claws and the 

 outside of the basal segment black. The spiracles are 

 vertically oval, and shining black. The surface of the body 

 under a one-half inch objective has a shagreened appear- 

 ance, with numerous fine, short hairs scattered over the 

 surface. 



The thoracic shield on the top of the 2d segment (first 

 after the head) is wider in front than behind, and is divided 

 by a ti-ansverse impressed line into two parts. Most of the 



