668 



AN INTRODUCTION TO ENTOMOLOGY 



the hind wings being greatly reduced in size. It is of a beautiful pea- 

 green color, with two white bands on the fore wings and one on the 



hind wings. In color it re- 



/?.^, 



sembles members of the He- 

 mitheinae; but the structure 

 of its wings (Fig. 824) shows 

 that it belongs in the Laren- 

 tiinae. The larva feeds on the 

 leaves of grape, which it rolls. 

 The scallop-shell moth, 

 Calocalpe unduldta.- — This is 

 a pretty moth, with its yel- 

 low wings crossed by so many 

 fine, zigzag, dark brown lines 

 that it is hard to tell which of 

 the two is the ground-color 

 (Fig. 826). It lays its eggs in 

 a cluster on a leaf near the tip 

 of a twig of cherry, usually 

 wild cherry. The \avvse make 

 a snug nest by fastening to- 

 gether the leaves at the end 

 of the twig; and within this 

 nest (Fig. 827) they live, add- 

 ing new leaves to the outside 

 as more food is needed. The 

 leaves die and become brown, 

 and thus render the nest con- 

 spicuous. There are two gen- 

 erations in the year. The lar- 

 vae of the fall brood are black 

 above, with four white or 

 green stripes, and flesh-colored below; the larvae of the summer brood 

 are black only on the sides. When full-grown they descend to the 

 ground to transform, and pass the winter in the pupa state. 



The diverse-line moth, Lygris diver silinedta. — This moth has pale 



ochre-yellow wings, 



with a brownish shade 



near the outer margin, 



and crossed by many 



diverging brown lines 



(Fig. 828). It varies 



from 37 to 50 mm. in 



expanse. We have oft- 

 en found this moth on 



the side of our room, 



resting on the wall, 

 head downward, and with its abdomen hanging down over its head 

 in a curious manner. The larva feeds on the leaves of grape. There 



Wings of Dyspleris ahortivaria. 



Fig. 825. — Dyspleris aborti 

 varia. 



Calocalpe un- 



