DURHAM DIPTERA, 36 1 



LI. 



26 (1). Costa reaching to the end of V.4. 



27 (28). Arista thick and style-like ; wings sometimes 



shortened. Elachyptera, Mcq. (641) 



28 (27). Arista hair-like and bent ; wings never shortened. 



29 (30). Face very distinctly produced forwards at the mouth 



edge ; proboscis often very long, the suckers narrow 

 and bent back knee-like on the trunk. 



Siphonella, Mcq. (640) 



30 (29). Face not protruding at the mouth ; proboscis short, 



with moderately broad suckers only slightly bent 

 back. 



31 (34). V.4 3 three or four times as long as V.4 2 . 



32 (33). V.I . ending about the middle of the wing ; large 



species, usually thickly pubescent. 



Lipara, Mg. (626) 



33 (32). V.I. ending at about one-third of the wing; smaller 



species, usually quite bare. Oscinjs, Ltr. (639) 



34 (31). V.4 3 at most twice as long as V.4 2 . 



618. Mosillus, Ltr. (2658. subsultans, F.) 



[Efihydridce] 

 tables op species. 

 626. Lipara, Mg. 

 Life history unknown. 



1 (2). Dorsum very much arched, and thickly covered with 



pale felt-like hairs. (2681. lucens, Mg.) 



2 (1). Dorsum flat and almost bare. (2682. rufitarsis, Lw.) 



628. Platycephala, Fin. 

 Pupae have been found in reed stems. 



1 (2). Large species, 7 mm. The frontal protuberance, 



measured from the eye margin to the front corner, 

 nearly as long as the antennas; scutellum quite 

 bare. (2685. planifrons, F.) 



2 (1). Smaller species, 5 mm. Frontal protuberance shorter 



than the antennas ; scutellum haired at the edge. 



(2684. wnbraadata, F.) 



