REPORT OF THE STATE ENTOMOLOGIST I917 



35 



a little less than one-half of an inch. The antennae arc lonsr, slender 

 and dark brown with numerous fine white annulations. The palpi 

 are moderately prominent and mottled with yellowish and dark 

 brown scales. The head is mostly purplish brown shading to yellowish 

 brown above the mouth. The thorax is thickly covered with dark 

 brown scales with a variable mottling of yellowish brown, the abdo- 

 men being a little darker. There is in well-marked specimens near 

 the base of the forewing a rather broad, broken, angulate darker 

 band near the basal third and a less distinct and more regular but 

 somewhat broken dark band near the distal fifth, an area between 

 this and the basal third being a variable grayish with one or more 

 dark spots near the costal margin. The hind wings are dark fuscous 

 and both fore and hind wings are margined with rich purplish brown 

 scales. 



Pupa (figure 4). Length about one-fourth of an inch, moderately 

 stout and dark bronzy yellow, variably marked with fuscous, espe 

 daily on the posterior abdominal segm.ents. 

 Ihe head is dark brown with a few fine, 

 moderately long ha!rs. Antennal cases 

 slender, the variably yellow mottled wing 

 cases extending to the sixth abdominal seg- 

 ment, the leg cases reaching just a little 

 beyond. The mouth-parts and most of the 

 median ventral area between the antennal 

 cases yellowish. Ihe dorsum of the thorax 

 dark bronzy yellow. Scutellum fuscous yel- 

 lowish and with a very fine short pubescence. Dorsum of the 

 abdominal segments moderately smooth, shiny, the segments when 

 flexed ventrally showing along the anterior marg'.n series of minute 

 closely set teeth. Terminal segment yellow'sh. 



Coconn (figure 5). The. cocoon 

 ^^' " \>^-^.'^?'^'~^' J'^^-O'' 1 / 'y is spun upon the upper surface 

 /- " of the leaf and cons'sts of an 



V , __^ elor gate oval mass of thick wh'te 



'J_ - % . webbing about five-e'ghths of an 



inch long and one-fourth of an 

 inch wide. It is frequently near 

 the midrib and covers the true 

 cocoon, wh'ch is faintly seen 

 beneath. The pupa wriggles out 

 partly from under the webbing 

 before the moth escapes, the 

 pupal shell projecting as in the 

 sesiids. 



Larva. The caterpillars (figure 

 6) are quite variable in appear- 

 ance. The smallest observed on the leaves were about one-eighth 

 of an inch long, mostly pale greenish yellow. The head is a distinct 

 amber shade with a rather conspicuous dark-brown group of closely 



Fig. 4 Apple and 

 thorn skeletonizer, side 

 view of pupa. (X 6) 

 (Author's illustration) 



y ~-\ ^ , ... - , ^ . ^ 



Fig. 5 Apple and thorn skeleton- 

 izer, cocoon on leaf, the true cocoon 

 is partly revealed through its cover- 

 ing of webbed silk. (X 2) (Author's 

 illustration) 



