4rt THE BROWN-TAIL MOTH. 



hairs along the front edge incline forward over the head. 

 They vary in length, the longest being about equal to the 

 width of the head. Those on the posterior part of this shield 

 are short, and sparsely scattered over the surface. A small 

 tubercle occurs behind the outer end of the thoracic shield, 

 and in line with the posterior part; the next is larger, 

 oblique in front of the spiracle, and clothed with long hairs 

 which incline forward more or less ; the next tubercle is 

 about half way between the last and the leg. The 3d and 

 4th segments have three tubercles on each side in an obli(iue 

 row above the spiracular line, and two below. These two 

 are represented on each of the segments of the body after 

 the head, forming two subspiracular rows of tubercles. 

 Above the spiracular line, on each side of segments 5 to 13 

 inclusive, are two large, round, nearly equal-sized tubercles, 

 which may be called the subdorsal and lateral tubercles. 

 The hairs on the head and other parts of 4hc body are similar 

 to those represented in Plate 9, Fig. 2, and the long ones 

 in Fig. 5, except those of a clear Avhite color (Plate 9, Fig. 

 1 ) on the upper side of the lateral and a few on the outside 

 of the subdorsal tubercles, on segments 5 to 12 inclusive. 

 These hairs form a row of eight lunate white spots along 

 each side, which is the most striking characteristic marking 

 of the caterpillar. 



The larvie spin their cocoons and pupate during the last 

 half of .lune, remaining in this stage about twcnt}'^ days. 

 A favorite place for pupation is the leaves at the tips of the 

 branches, and not unfrequently a dozen or more larvfe 

 assemble and spin a common web, within Avhich each cater- 

 pillar forms its own cocoon and transforms into the pupa. 

 Another favorite place is under fences and beneath the edge 

 of clapboards. In 1.S97 Mr. Kirkland saw a mass of 

 cocoons nearly two feet across in the cornice of a house 

 on Vine Street, Sonicrville, 



The cocoons are composed of grayish silk, so loosely 

 constructed that the pu})a may be readily seen through it. 

 The pupa is about five-eighths of an inch long, of a dark- 

 brown color, with II cHiiical spine at the end of the al)do- 

 nien, this spine Ijoing armed with a cluster of minute hooks 



