INSECTS AFFECTING FOREST TREES. 527 



from 70 to 170 eggs, plate 16, figure 10. The individual egg is about %o of an inch 

 long, obovate, compressed on the sides and the apex reddish-brown, while below 

 it is 3'ellowish-white. The full grown larva is a beautiful creature with its round 

 head and short brown hairs and fascicular spines. It is represented at plate 16, 

 figure 8. 



Natural Enemies. This species suffers from the attack of several natural enemies. 

 Dr. Lintner observed that 8 out of the 30 individuals he reared were parasitized by 

 a small fly which proved to be Limiieria fiigitiva Say. This little parasite spins a 

 cocoon on the outside of its victim's body. It was found under the elevated central 

 portion of the caterpillar which was clasping a stem. Another small parasite was 

 also reared from this insect by Dr. Lintner. 



Cacoccia fcrvidana Clem. 



This little caterpillar was common at Karner in June and July, igoi,and its web 

 nests were observed in numbers here and there on the scrub oaks. It was much 

 rarer in ig02, and apparently fluctuates considerably in numbers from year to year. 

 'Life History. The web nests of this species began to appear June 13, 1901, and 

 were more common on the 26th and later. Inhabited webs were also taken July 

 27th, and others August 9th. It appears probable that the period of flight may be 

 an extended one, and that the insect breeds more or less during the summer 

 months. The web is rather small, irregular, and measures about 3 or 4 inches in 

 length and 2}^' to 3 inches in its greatest diameter. It is filled with a mass of 

 excrement, as in the case of allied species, plate 16, figure 12. A number of small 

 dark colored caterpillars, about - 5 of an inch long, were observed in the nests after 

 most of the moths had appeared. They looked very much like the full grown 

 larvae of this species, and may have been retarded individuals. Unfortunately 

 ■ none of the latter were brought to maturity. Pupation occurs in the nest, and 

 adults were bred July 23, 26, and August 16, 1901. 



Description. The larvae collected June 26th were nearly an inch long, with the 

 head and thoraic shield jet black, and the body varying in color from yellowish- 

 green to olive-green. The dark brown tubercles are not very conspicuous. Scanty 

 cocoons were spun by the larva; in their nests, a.id the meshes entangle a mass of 

 excreta. The pupa is about ^8 of an inch long, dark brown, ringed with lighter 

 brown, and each segment bears a conspicuous row of stout spines, and behind it 

 another row of smaller ones. 



The moth is represented on plate 16, figure 11, and has been described by 



