INSECTS AFFECTING PARK AND WOODLAND TREES 415 



of August. The adults of the second generation winter in the cocoons. 

 The eggs are deposited in little slits in the leaves. Dr Riley states that 

 some of the flies appear early in the spring, while others do not issue till 

 the latter part of JuneT* A single parasite, Limneria lophyri Riley, 

 has been reared from this species. 



Description. The adults have been described by Mr Saunders practi- 

 cally as follows : 



The male has a wing spread of about y 2 inch and the female of 2 A 

 inch. The body of the male is black, excepting the yellowish underside 

 and tip of the abdomen. The female is honey-yellow, with the head and 

 thorax a little darker, the thorax with the abdomen being slightly marked 

 with black. The wings are transparent with black veins. 



The full grown sawfiy larva has a black head, the body is yellowish 



white and is ornamented with two rows of oblong square black spots down 



the back. On each side there is another row of about 1 1 black, nearly 



square spots, they being a little longer than broad. 



Fir sawfly 



LopJiyrns abietis Harr. 



Clusters of black headed, dark green, dark striped caterpillars about )/?, inch long, 

 defoliate fir, spruce and pitch pine in midsummer and probably early fall. 



This sawfly is one of the rarer species occurring on hard pine. It 

 was taken by us in small numbers on hard pine at Karner in early June and 

 again the latter part of July. It is probable that this species, like its allies, 

 has two generations, the first produced by adults which hibernate in the 

 cocoons and the second from sawflies emerging about midsummer. This 

 species has been recorded from several northeastern states and Canada, and 

 Dr Fletcher states that Mr Harrington obtained the larvae of this form 

 from spruce and apparently the same thing occurred very abundantly on 

 white cedar. 



Description. The full grown larvae have the head yellowish or black 

 and the body a dull green with a pale dorsal stripe ; in some specimens the 

 stripe is lighter on the posterior portions of each segment. There is also a 

 subdorsal and stigmatal paler stripe. The true legs are black and the false 



