BULLETTN" 419, U. S. DEPARTMENT OF AGE.ICULTTJRE. 



DESCRIPTION OF THE GRAPE LEAF-FOLDER. 



ADULT. 



The wings of the moth when fully expanded (PL I, c) meas- 

 ure about nine-tenths of an inch. These are very dark brown in 

 color with an opalescent or silvery reflection, and are bordered with 

 white. The forewings in both sexes have two nearly oval white 

 spots, while on the hind wings of the male there is one spot, which, 

 in the female, may be divided. The body is black, crossed by two 

 white bands in the female and by one band in the male. The male 



antennae are thickened 

 or knotted near the 

 middle, while in the fe- 

 male (PL I, 5) they are 

 uniform and thread- 

 like. 



THE EGG. 



The egg of the grape 

 leaf-folder (fig. 2, a; PL 

 I, a) is eUiptical in out- 

 line and very minute, 

 measuring about 0.7 

 mm. in length. Its 

 membranous chorion, 

 or outer covering, pre- 

 sents under high mag- 

 nification dehcate hex- 

 agonal markings. 



THE LARVA. 



The larva, when 

 fully grown (PL I, li; 

 PL II, h) is about an 

 inch long, is widest in 

 the middle, and tapers toward either end. It is glossy, translucent 

 yeUow-green on the sides and somewhat darker above, with scattered 

 fine yellow hairs on each segment. The head and prothoracic shield 

 (PL I, /, Ti) are fight brown, and there are light-brown spots on the 

 sides of the first two thoracic segments. 



Fig. 2. — a, Egg of the grape leaf-folder showing larva just before 

 hatching; 6, newly hatched larva. Greatly enlarged. (Original.) 



THE PUPA. 



. The average pupa of Desmia funeralis is a fittle over half an mch 

 long (PL I, d). The fight-brown color shown just after pupation 

 soon turns quite dark. The pupa tapers characteristically toward 

 the posterior end, where an 8-hooked cremaster is located. 



