56 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



often Tvith darker markings oh caudal margin near median line. 

 Anal plate brownish, with comblike structure on caudal curvature 

 composed of from 5 to T closely set dark brown spines, the outer spine 

 on each side considerably reduced. Spiracles small, dark brown: 

 thoracic legs well developed, whitish, distal end dark, claw black. 

 Abdominal prolegs well developed, each with a single circle of from 

 25 to 27 strongly curved, sickle-like hooks. Tubercular areas disk- 

 like, whitish, with a single, slender, light-colored seta. On third 

 abdominal segment : Tubercle I central, on dorso-lateral region ; tuber- 

 cle II caudo-ventrad of I, on posterior annulet; tubercle III about 

 its width above spiracle ; tubercles IV and V coalesced, directly below 

 spiracle, about twice as far from it as is tubercle III, the seta of 

 tubercle IV being considerably reduced ; tubercle VI caudo-ventrad 

 of IV and V, and tubercle VII with three setae situated near base of 

 proleg." (See fig. 11, c.) 



Cocoon. — About 6 mm. long and a third as wide. Exterior more 

 or less covered with bits of bark or other material, concolorous with 

 surroundings; within densely lined with whitish silk. (See fig. 11, 

 d, e.) 



Pupa. — About 5 mm. long. Color uniformly brown, except thoracic 

 region, leg and wing sheaths, which, as pupa nears maturit}', are 

 darker. On dorsum of abdominal segments 3 to 7, between the spir- 

 acles on each side, are 2 rows of short, stout spines, projecting 

 caudad, one row near cephalic border of segment and one near center 

 or on caudal margin, the spines of caudal row smaller and more 

 numerous. Remaining segments (except 1 and 2, which are spineless) 

 with but a single row. Anal segment truncate, the 7 to 8 stout spines 

 set on caudal margin. Cremaster of from 5 to 8 slender hairs hooked 

 at tip and arising about equally distant from each other on caudal 

 region of anal segment. Spiracles slightly elevated, dark brown. 

 AVing sheaths and those of third pair of legs about equal in length 

 and reaching middle of fourth abdominal segment. In emergence 

 of adult, the pupa works out. from cocoon about one-half its length, 

 the empty exuvium remaining in this position in the cocoon. (See 

 fig. 11, d,e.) 



Adidt or moth. — The description of the adult as given by Walsh in 

 his first report as Illinois State entomologist, page 80, is herewith 

 presented : 



Ground-color of front wing, black. The basal one-fourth irregularly covered 

 with rust-red. so as to leave only a few black markings. On the costa, and 

 rather more than one-third of the way to the apex of the wing, a pair of streaks 

 obliquely directed toward the posterior angle of the wing; the inner streak of 



"The description of the larva by Simpson (Bulletin No. 41, Division of Ento- 

 mology, p. 2,S) is not entirely in accord with the above. The length is said to 

 be five-eighths inch, and for the " pre-spiracular " tubercle three setae are re- 

 corded. 



