Vll 



Blood-Sdcking Genera 

 Genus Haematobia. 



(o) Palpi shorter than proboscis, partly ensheathing it. 

 (6) Labellae fleshy, easily visible, (c) Arista plumose dorsally ; 

 three to four hairs ventrally. (d) Third and fourth long veins 

 reach the apex of wing. Small mottled flies. 



vj: 



vj 0^ 



■SI 



OTtl OIJ 5 



,.>. 



Fig. 94. Shewing the first posterior cell open at the margin of 



the wing. 

 Genus Lyperosia. 



(a) Palpi long and flattened, ensheathing the proboscis, 

 (b) Arista plumose dorsally. (c) Wing as in Stomoxys. Differs 

 thus from Glossina. These flies are common on camels. L. 

 irritans is the ' horn-fly ' termed H. serrata in U.S.A. 



Genus Beccarimyia. 



(a) Palpi shorter than proboscis. (6) The first post-cell of 

 the wing is closed before the margin. 



Fig. 95. Stomoxys, shewing resting position 

 of Wings, X 2. {After Austen) 



Genus Stomoxys. 



(a) Palpi very small, bearing some hairs ; not projecting 

 beyond the epistome. {b) Proboscis is bent at its base like 

 an elbow joint, (c) Arista plumose dorsally, distally forms a 

 fine hair, (d) Third and fourth long veins reach the apex. 

 The fourth is bent beyond the posterior cross vein. Wings 

 diverge widely. S. calciLrans, the ' stable ' fly, is common about 

 farm-yards. 



