240 DURHAM DIPTERA. 



XXXII. 439. 



439. Graphomyia, Dsv. 

 Larvae in dung. 



1 (2). Male abdomen orange with black spots ; female grey 



with black spots. 

 191 1. Graphomyia maculata, Scop. 

 Hesleden, 4 $ and 2 ?, July- August, 1 899-1 900. 



2 (1). Male abdomen grey with black spots. 



(19 1 2. picta, Ztt.) 



440. Musca, L. 



Larvae in dung and in decaying animal and vegetable 

 matter. 



1 (2). Eyes of the male separated by about the fourth of 



the width of the head. In the female the frontal 

 stripe narrow in front, but widening out on the 

 vertex, so as to blot out the white eye borders. 

 19 13. Musca domestica, L. 

 Very common in houses. 



2 (1). Eyes of the male almost touching ; frontal stripe in 



the female rather narrow, with parallel sides, which 



do not blot out the white eye margins on the 



vertex. 



1 9 14. Musca corvina, F. 



I have only noticed this in Darlington Park, where 



the males were abundant on the seats near the 



pond on 19th May, 1903. 



441. Cyrtoneura, Mcq. 



Larvae of this and the next genus in fungi and cow-dung; 

 also parasitic in larvae of Lepidoptera and Hymenoptera. 



1 (2). Legs all or partly orange. 



1 91 5. Cyrtoneura stabulans, Fin. 

 Hesleden, common. Bishop Auckland, 3 $, 6 ?. 



2 (1). Legs all black. 



3 (6). V.4, somewhat sharply bent upwards ; palpi yellow. 



