INSECTS AFFECTING PARK AND WOODLAND TREES 53 I 



fuscous beyond the middle. The posterior wings are dark fuscous above, 

 pale yellowish beneath. Wing spread about y 2 inch. 



Life history. ^ The nests of this species began to appear June 13, 1901, 

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

 July 27 and others Aug. 9. The period of flight is probably extended and 

 the insect appears to breed more or less during the summer months. The 

 web is rather small, irregular, measuring 3 to 4 inches long and 2^ to 3 

 inches in diameter. It is filled with a mass of excrement, as in allied 

 species. A number of small, dark colored caterpillars about 2 / 5 inch long 

 were observed in the nests after most of the moths had appeared. They 

 closely resemble full grown larvae and may have been retarded individuals. 

 Unfortunately none of the latter were brought to maturity. 



Natural enemies. This species is preyed on by several parasites. 

 Microcentrus delicatus Cress, and M. s o 1 i d ag i n i s Cress. MS., 

 have been reared from this insect. Several parasites were bred from this 

 species and a plant bug, probably Podisus placid us Uhl., presumably 

 preys on the larvae. 



V-marked leaf roller 



Archips argyrospila Walk. 



Delicate green, brown-headed caterpillars about 3/£ inch long, feed on oak and other 

 trees in early June and also in August or early September. 



This species is very closely allied to the oblique banded leaf roller, 



Archips rosaceana Harr., and like it is a general feeder, having been 



recorded on oak, hickory, apple, wild cherry, rose, soft maple and elm. It 



lives between the webbed-together leaves and produces two generations 



annually, the moths of the first appearing the latter part of June or early in 



Jul)-. The larva has been described by Dr Packard as follows : 



Color delicate grass-green, with a darker dorsal vesicular line, not 



polished, piliferous spots polished ; head brown, cervical shield polished, 



glassJike, and scarcely darker than body ; anterior edge lighter. Thoracic 

 legs pale. 



