326 ENTOMOLOGICAL NEWS. [Oct., '07 



segments it becomes quite broad, constricting, however, to a narrow 

 hand again, between the sub-dorsal horns of the eleventh segment, but 

 then enlarging to form an oval spot. Just behind the sub-dorsal horns of 

 the tenth segment a small lateral extension from this dorsal area con- 

 nects it with an irregular patch of the same color which lies on the 

 tenth, eleventh and twelfth segments between the sub-dorsal and lateral 

 rows of horns. The median area and the lateral patches are so placed 

 with reference to the sub-dorsal horns of the eleventh segment as to 

 leave these arising from the centre of peninsulas of yellow, the isthmus 

 being on the twelfth segment. The dorsal band is interrupted on the 

 eighth and ninth segments by a blue spot on each segment, and there is 

 a blue spot below the dorsal horn on the margin of the red area on seg- 

 ments four, five, six, ten and eleven, and a faint one on the twelfth 

 segment. Anal shield greenish brown, crossed by two light bands. A 

 similar patch occurs just below and lateral to it on each side, crossed by 

 one band. The two fine green lines between the sub-dorsal and lateral 

 rows of horns, described in the last instar, are present, but the creamy 

 stripe they limit is absent. 



There is a narrow yellow band between the two second sub-dorsal 

 horns, which encloses their bases and extends a little lateral to them. 

 At the base of each third sub-dorsal horn toward the mid-dorsal line 

 is a yellow spot. In general the yellow color is deeper close to the 

 margins of the red areas. 



Fourth sub-dorsal horn very minute and bearing only one spine. 

 The body, as a whole, is noticeably four-sided. 



Duration of instar, 5 or 6 days. 



Pupation. — The larva changes color somewhat as pupation approaches, 

 the blue and red becoming duller, and the yellow assuming a reddish 

 tinge. After finding a place at which to pupate the larva bites off any 

 loose bark which may be present, smoothing the surface, then spins a 

 loose network of threads around itself and attached to the bark, within 

 which it forms the cocoon. 



The threads of the cocoon are attached to the bark and are woven 

 back and forth, the larva moving its head along the lines of a figure 8 

 from one side to the other. As the threads come closer, the larva seems 

 to secrete a fluid from its mouth which causes the threads just being 

 spun to adhere to those already in place and continuation of the spin- 

 ning finally produces a solid covering. 



During this time the larva contracts as much as possible, drawing its 

 head back into the second segment and is able to move about quite 

 freely within the cocoon. 



The cocoon is very light-colored at first, but gradually darkens, 

 hardening at the same time, and assumes the peculiar markings charac- 

 teristic of this species. As far as outside appearances go, it is completed 

 in two or three hours, and at this time the outer network is often no- 



