238 DURHAM DIPTERA. 



XXXII. 



14 (13). V.4 4 much bent upwards at half its length ; abdomen 



with many black spots on a light grey or orange 

 ground. Graphomyia, Dsv. (439) 



15 (8). V.4 4 sharply bent up towards V.3., very nearly 



touching it at the wing margin, separated by much 

 less than the length of X.4. Musca, L. (440) 



16 (7). Mid tibiae with one or more erect bristles, or with 



shaggy hairs on the inner side. 



17 (20). V.4 4 bent upwards in a bow-shaped curve (V. 29). 



18(19). V.l.b. ending in the costa much beyond the middle 

 of the wing, and almost above the point where 

 X.5 2 meets V.4. Mesembrina, Mg. (443) 



19 (18). V.l.b. ending about the middle of the wing, and 



almost above X.4. Pyrellia, Dsv. (444) 



20 (17). V.4 4 sharply bent upwards, almost at a right angle 



(V. 28). 



21 (22). Thorax, besides the ordinary bristles and side hairs, 



with somewhat matted golden hairs, which are 

 very long on the pleurae. Pollenia, Dsv. (437) 



22 (21). Thorax without the above golden hairs. 



23 (26). Thorax and abdomen brilliantly metallic, the ground 



colour not concealed by light dusting. 



24 (25). Frons and jowls shining metallic. 



Euphoria, Dsv. (447) 



25 (24). Frons and jowls not metallic. Lucilia, Dsv. (448) 



26 (23). Thorax and abdomen not brilliantly metallic, but 



either dull metallic blue, or with the ground colour 

 partly concealed by light dusting. 



27 (28). Jowls black with black hairs ; thorax and abdomen 



with scarcely any dusting; wings, at rest, held 

 parallel to the body. 



Protocalliphora, Hough. (445) 



28 (27). Either the jowls or their hairs orange ; thorax dusted ; 



abdomen with light reflections ; wings, at rest, held 

 at an angle to the body. Calliphora, Dsv. (446) 



