ATTACKING THE LEAVES. 215 



growth, has fed upon the larva of the May-beetle. Within 

 this snug enclosure it soon changes to a chrysalis, and finally 

 assumes the perfect form, as shown at a in the figure. The 

 fly is black, with sometimes a faint bluish tiut, with dusky 

 wings, and the body more or less covered with pale-yellow 

 hairs, which are thickest on the under side. 



A curious whitish fungus sometimes attacks this larva and 

 destroys it, growing out at the sides of the head; the pro- 

 tuberance or sprout rapidly increases in size, often attaining 

 a length of three or four inches, when it presents the appear- 

 ance shown in Fig. 221. A very large number frequently 

 die from this cause. Trees infested with the beetles should 

 be shaken early in the morning, when the insects will fall, and 

 may be collected on sheets and killed by being thrown into 

 scalding water. Besides the cherry and plum, these insects 

 feed on the Lombardy poplar and the oaks. On account of 

 the length of time the larva takes to mature, the beetles are 

 not often abundant during two successive seasons. 



No. 114. — The Cherry-tree Tortrix. 



Cacoecia cerasivorana (Fitch). 



Early in July there may often be found on the choke- 

 cherry, and sometimes also on the cultivated cherry, one or 

 more branches having all their leaves and twigs drawn 

 together with a web of silken threads. On opening one of 

 these enclosures, there will be found a large number of active 

 yellow larvse. These are about five-eighths of an inch long, 

 nearly cylindrical, the head black, body above yellow, a little 

 paler between the segments, with a few very fine yellowish 

 hairs. The anterior portion of the second segment and the 

 hinder portion of the terminal one are black; there is also 

 a faint dorsal line of a darker shade. The under side is 

 similar to the upper in color, and the six anterior claw-like 

 feet are black. 



The chrysalis is formed within the nest in which the larv.a 

 has lived, and is of a pale-brown color. The moth, when at 



