INSECTS AFFECTING PARK AND WOODLAND TREES 697 



species have been sent to us by a correspondent, who took them from 

 about the roots of wheat plants. 



Coenus delius Say 



A yellowish brown, black-dotted, somewhat oval plant 

 bug Y% inch long. 



This yellowish brown, black-dotted, somewhat 

 oval plant bug, measuring about inch in 

 length, was taken at Karner on hard pine in 

 1 90 1. The species has a wide range, it having 

 been listed from Colorado, New Jersey, Iowa, 

 and Professor Uhler records it from as far south 

 as Texas and as occurring in Massachusetts, New 



Fig. 220 Coenus delius, enlarged 



York and other states. (original) 



Lace-winged fly 



Hemerobius stigmaterus Fitch 



Delicate greenish or brownish lace-winged flies with golden eyes, occur on many 

 plants, their flattened long-jawed ferocious larvae devouring plant lice. 



. These flies are rather well known both as adults and larvae. The 

 above named species was found in small numbers on hard pine at Karner. 

 It appears to be a common species according to Dr Fitch, in the Northern 

 and Western States. The general appearance of a lace-winged fly is shown 

 at plate 20, figure 18. The peculiar spheric cocoon is illustrated at 18a of 

 the same plate and the singular stalked eggs at 18b. The young aphis 

 lions are very bloodthirsty, even attacking smaller larvae of their own 

 species as well as destroying many aphids. 



Micromus montanus Hag. 

 This grayish brown, lace-winged fly ^ inch long with a wing spread of 

 24 inch occurs in September on hard pine. The veins are prettily marked 

 with irregular alternating light and brown spaces. This beneficial species 

 has been recorded from Massachusetts and the White mountains. 



