DIPTERA. 365 



the middle of June every consecutive year, ])ut liave not succeeded 

 in hatching the insect. 



Miiller, in 'Gardener's Chronicle,' 1870, gives the following descrip- 

 tion of this insect : " It is reddish-yellow, with a white beak. Its 

 thorax shows three narrow, short, pale-brown streaks ; the poisers are 

 pedunculated and whitish ; in the segments the abdomen is brown, 

 each segment with a fine brownish lateral streak ; the head border of 

 the segments beneath is fringed wdth long whitish hairs. The six 

 legs are long and slender, brownish, and clothed with a white pubesc- 

 ence. The wings are comparatively large, and sparse greyish hairs, 

 and suffused with a weak iridescent violet ; their veins are brownish. 



Fig. 3S5.— Foliage of ash injured by Fig. S^6.— Edges of oak leave." 



Diplosis botularifc. folded by Diplosis dryobia. 



The feelers are brownish, 26-jointed in ^ and 14 in ? . The latter 

 furnished with a short ovipositor." 



Diplosis (Macrodiplosis) dryobia, Lw. 



This species causes the leaves of oak to fold over, as depicted 

 in the illustration (fig. 336). The folded portion is of a light-yellow 

 colour, and the larvae live within the folded portion. They pupate in 

 the ground. 



I found this species very common in Cheshire in the hedges. It 

 often happened in that part of the country that young oaks grew up 

 in the thorn hedges, and were of course switched with the thorns, and 

 this species was generally found on the foliage of those hedge oaks. 



