INSECTS INJURIOUS TO THE ORANGE. 331 



On reaching maturity, the case is suspended from a leaf or 

 twig, and within it the larva changes to a dark-brown chrys- 

 alis ; the chrysalis of the male works its way partly out of 

 the case at the lower end, where, after the escape of the moth, 

 the empty pupa-si^in remains. 



The male moth (Fig. 392) is dark brown, sometimes nearly 

 black, with delicate wings, small body, and feathered antennae, 

 and measiii'es, when its wings are spread, about six-tenths of 

 an inch across. The female is wingless, of a whitish color, 

 and transforms within the case, where, also, the eggs are laid, 

 the young larvae, when hatched, escaping from the orifice at 

 the lower end. This insect has also been found feeding on 

 the leaves of the fig. 



The conspicuous cases constructed by the larvae are easily 

 seen, when they may be picked and destroyed. 



No. 241. — The Orange Leaf-roller. 



Platijnota rostrana (Walker). 



During the growing season the edges of the young leaves 

 of orange-trees are often found rolled up into a sort of tube. 

 These tubes are formed by a small, yellowish-green cater- 

 pillar, which, when full grown, is about three-quarters of 

 an inch long, with a brown head, and a polished plate of the 

 same color on tlie next segment, a dark stripe down the back, 

 and an indistinct dark line along each side. It is active in 

 its movements, lives within the tube it constructs, and feeds 

 upon the foliage. 



The larva changes to a brown chrysalis, nearly half an inch 

 long, within the case, from which in a few days a moth 

 escapes. 



The male differs from the female in the markings on its 

 fore wings. All the wings of both sexes have a ground-color 

 resembling that of cork, but the fore wings of the male have 

 a dark-brown stripe along the front edge, expanding into a 

 large spot of the same color towards the tip of the wing, 



