THE APPLE LEAF-SEWER. 



to the leaf and are usually deposited on the under side, singly or 

 in irregular groups (fig. 4, a). After hatching the eggshell is white 

 and retains its shape. One often finds shells which remain for some 

 time after the egg has hatched. 



THE LARVA. 



On hatching, the larva escapes through an irregular crack near the 

 outer edge and leaves the eggshell in 2 or 3 minutes. The newly 

 hatched larva is very active; its color is yellowish green throughout, 

 with the exception of the orange-colored head. Riley describes the 

 full-grown larva as follows : 



Length about 11.5 mm. Head a yellowish orange, thoracic shield yellowish, the 

 body a variable fuscous yellowish green. The head is somewhat flattened, the labium 

 reddish brown, the mandibles fuscous apically and the small antennas are whitish 

 basally, pale orange near the middle, and semitrans- 

 parent apically. The large thoracic shield has irregu- 

 lar black markings at the lateral posterior angles, the 

 body is somewhat more fuscous laterally, and the setig- 

 erous tubercles are rather large, lighter than the body, 

 and each bears a single fuscous hair. Anal plate yel- 

 lowish with a conspicuous irregular, transverse, black 

 spot on the posterior half. True legs with the basal 

 segment fuscous yellowish, the other segments dark 

 brown or black, prolegs pale yellowish green. 



There is great variation in the size and 

 color of the larva?, but the conspicuous black 

 spots near each outer hind corner of the 

 thoracic shield serve as a ready means of 

 identification (fig. 3, b). 



THE PUPA. 



When first formed, the color of the pupa 

 is a dark yellowish brown (fig. 5, b). The 

 last four abdominal segments retain their 

 original color, but the head, eyes, and wing 

 shields gradually change to black, mottled 

 with yellow. The wing shields extend to 

 the fourth abdominal segment; the antennae not quite so far. The 

 anterior and posterior borders of each abdominal segment are armed 

 dorsally with a transverse row of minute decurved spines. The anal 

 segment is quite sharp. The size is variable and averages 3 mm. by 

 7.5 mm. 



THE ADULT. 



The moth (fig. 6) measures about 18 mm. across the expanded 

 wings. The head, thorax, and abdomen are dark brown dorsally 

 and light gray upon the ventral side. The antennae are dark brown, 



Fig. 5.— The apple leaf-sewer: a, 

 Apple leaf showing pupal case 

 and manner of emergence; b, 

 pupa, much enlarged. (Origi- 

 nal.) 



