LIST OF DIPTERA. 905 



claws black : wings gray, tawny at the base and along the fore 

 borders : wing-ribs and veins tawny; veins pitchy towards the tips; 

 tip cross-vein forming a very obtuse angle with the fourth longitudi- 

 nal vein, very slightly curved inward near the base, straight from 

 thence to the tip, joining the border at some distance above the tip 

 of the wing ; lower cross-vein with two distinct curves, the lower in- 

 ward, the other outward ; scales tawny. Length of the body 2% 

 lines ; of the wings 5i lines. 



Musca Calleva, n. s., fern. Cinerea, capite antico ceneo, thorace vit- 

 tis guatuor nigris, abdomine fulvo micante subtessellato, anten- 

 nis piceis basi nigris, palpis pedibusque nigris, alis limpidis. 

 Body gray, beset with black hairs and bristles : head black on 

 the crown, brassy in front; epistoma not prominent; sides of the 

 face fringed with bristles along half the length: eyes pitchy ; fore 

 part slightly convex, its facets hardly larger than those elsewhere : 

 sucker black, clothed at the tip with tawny hairs ; palpi black, be- 

 set with black bristles : feelers black, shorter than the face ; third 

 joint pitchy, nearly linear, rather deep, rounded at the tip, about 

 thrice the length of the third joint ; bristle very slender, thick at 

 the base, very much longer than the third joint: chest adorned with 

 four black stripes : abdomen obconical, a little shorter and broader 

 than the chest, adorned with tawny lustre, slightly tessellated : legs 

 black, clothed with black hairs and bristles ; foot-cushions tawny : 

 wings colourless ; wing-ribs tawny ; veins black ; tip cross-vein 

 forming an obtuse angle with the fourth longitudinal vein, very 

 slightly curved inward along the whole length, joining the border a 

 little above the tip of the wing ; lower cross-vein almost straight, but 

 having three extremely slight inward curves ; middle curve with a 

 knob at each end ; scales white, with pale yellow borders. In the 

 fly described there is an outward stump near the tip of the lower 

 cross-vein of the right wing. Length of the body 2\ lines ; of the 

 wings 5 lines. 

 a. Interior of South Africa. Presented by the Earl of Derby. 



D. Muscidae Tomentosse, Desv. Essai Myod. 410. 

 Group I. Stomina, Desv. Essai Myod. 411. 

 Group II. Pollenia, Desv. Essai Myod. 412. 



PART IV. 4 K 



