LIST OF DIPTERA. 



Musca Proerna, n. s., fern. Viridis, purpureo et cyaneo varia, 

 palpis antennisque fulvis, pedibus nigris, alls limpidis basi sub- 

 fulvis. 



Body beset with black hairs and bristles : head blue, tinged 

 with purple, green and covered with white bloom in front ; crown 

 broad ; a pitchy stripe between the eyelets and the feelers ; epi- 

 stoma not prominent ; face pitchy, its sides beset with bristles at the 

 base : eyes red ; fore part flat, its facets larger than those elsewhere : 

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

 set with black bristles : feelers tawny, nearly as long as the face ; 

 third joint slender, linear, conical at the tip, more than four times 

 the length of the second joint ; bristle tawny, feathered with tawny 

 hairs, longer than the third joint : chest green ; cross-suture brassy ; 

 hind part and scutcheon blue, mingled with purple : abdomen ob- 

 conical, broader and a little shorter than the chest, tinged with blue 

 and purple at the tip : legs black, clothed with black hairs and 

 bristles ; foot-cushions pale yellow : wings quite colourless, pale 

 tawny at the base ; wing-ribs and veins pale tawny ; tip cross-vein 

 joined to the fourth longitudinal vein by an outward curve, very 

 slightly curved inward from thence to the tip, joining the border a 

 very little above the tip of the wing ; lower cross-vein very slightly 

 curved outward at the base and at the tip, its middle part occupied 

 by a slight inward curve ; scales buff. Length of the body 3 lines ; 

 of the wings 6 lines. 



Musca muralis, Barnstori's MSS. Viridis, cyaneo purpureoque 

 varia, capite nigro, palpis ferrugineis, antennis pedibusque nigris, 

 femoribus cganeis, alls subcinereis. 



Body beset with a few black hairs and bristles ; head black ; 

 epistoma tawny, prominent ; sides of the face tawny, fringed with 

 bristles towards the base : eyes bright red ; fore part rather flat, 

 composed of larger facets than those elsewhere : sucker black, 

 clothed at the tip with tawny hairs ; palpi pale ferruginous, beset 

 with black bristles : feelers black, as long as the face ; third joint 

 rather deep, linear, truncated at the tip, full four times the length 

 of the second joint ; bristle much longer than the third joint: chest 

 and abdomen green, mingled with blue and purple: abdomen ob- 

 conical, a little shorter but hardly broader than the chest : legs 

 black, clothed with black hairs and bristles; thighs blue; foot- 

 cushions tawny : wings slightly gray ; wing-ribs pitchy ; veins 

 black ; tip cross-vein forming an obtuse angle with the fourth lon- 

 gitudinal vein, very slightly curved inward from thence to the tip, 

 joining the border a little above the tip of the wing ; lower cross-vein 



