36 



NEW YORK STATE MUSEUM 



placed ocelli. There is a narrow, irregular, dark-brown line at the 

 lateral dorsal angles of the head case, a small, black, fuscous spot 

 ventrally and a pair of small, subtriangular, black spots sublaterally. 

 Antennae moderately prominent, mostly yellowish brown, slightly 

 fuscous apically. Thoracic and abdominal segments mostly a uniform 

 yellowish, the true legs pale yellowish and having the second segment 



Fig. 6 Apple and thorn skeletonizer, dorsal 

 or top view of a typical pale greenish cater- 

 pillar. The spots on this specimen are about 

 the average size. (X 6) (Author's illustration) 



fttscous and the distal segment much more slender, tapering and 

 with a distinct claw apically. There are well-developed cylindrical 

 abdominal segments, each leg when extended with a length approx- 

 imately three times its diameter. The tubercles are a pale fuscous 

 or fuscous, depending on the age of the caterpillar, each bearing one 

 or two moderately long hairs. 



Older larvae with a length of about three-sixteenths of an inch 

 are decidedly darker, though the general color is practically the 



Fig. 7 Apple and 

 thorn skeletonizer, head 

 and first two body seg- 

 ments of the caterpillar, 

 showing the arrange- 

 ment of the warts or 

 tubercles and the struc- 

 ture of the legs. (X lo) 

 (Author's illustration) 



Fig. 8 Apple and 

 thorn skeletonizer, side 

 view of a smaller, darker 

 caterpillar. Note the 

 relative size of the 

 black warts or tubercles. 

 (X 12) (Author's illus- 

 tration) 



same. The tubercles are much larger and in some specimens almost 

 confluent, so as to give the appearance of submedian black lines, 

 though in reality they are simply series of closely set tubercles. 

 The thoracic legs have a shade of fuscous on the apical portion of 

 the basal segment, the second segment is black and the third prac- 

 tically as in the earlier stage. 



Full-grown caterpillars have a length of nearly one-half of an inch 

 and present practically the same characteristics as given above, 



