896 LIST OF DIPTERA. 



feathered for three-fourths of the length : chest black : abdomen 

 blue, nearly elliptical, tinged with purple, broader than the chest : 

 legs black, clothed with black hairs and bristles ; foot-cushions 

 tawny : wings slightly gray ; wing-ribs pitchy ; veins black ; tip 

 cross-vein forming an obtuse angle with the fourth longitudinal 

 vein, very slightly curved inwards along the whole length, joining 

 the border at some distance above the tip of the wing ; lower cross- 

 vein with two very slight curves, the lower inward, the other out- 

 ward ; scales gray, with yellowish white borders. Length of the 

 body 3 lines ; of the wings 7 lines. 



a. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



Musca Phauda, n. s., mas. Cyanea, capite fulvo, thoraci fasciis 

 ceneis viridibusque, abdomine cyaneo-viridi apice purpureo, an- 

 tennis piceis, basi palpisque fulvis, pedibus ferrugineis, femori- 

 bus cinereo-piceis, alis subcinereis. 



Body clothed with black hairs and bristles : head yellowish 

 brown above, bright tawny on the crown, clothed beneath with 

 bright yellow hairs ; epistoma slightly prominent ; sides of the face 

 fringed with bristles on nearly the whole length : eyes dark red"; 

 fore part nearly flat, its facets larger than those elsewhere : sucker 

 pitchy, clothed at the tip with tawny hairs ; palpi tawny, beset with 

 black bristles : feelers tawny, shorter than the face ; second joint 

 armed with a stout bristle ; third joint pitchy, tawny at the base, 

 decreasing in depth from the base to the tip, which is rounded, near 

 four times the length of the second joint ; bristle rather less than 

 twice the length of the third joint, very stout for less than half the 

 length from the base : chest blue, covered with white bloom, adorned 

 with bronze and green bands : abdomen elliptical, shorter than the 

 chest, bluish green, tinged with purple towards the tip : legs dark 

 ferruginous, clothed with black hairs and bristles ; thighs pitchy, 

 tinged with gray ; foot-cushions tawny : wings slightly gray ; wing- 

 ribs pitchy ; veins black ; tip cross-vein forming an obtuse angle 

 with the fourth longitudinal vein, slightly curved inward for more 

 than half the length, straight from thence to the tip, joining the 

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

 deep curves, the lower inward, the upper outward ; scales gray, with 

 pale borders. Length of the body 3 lines ; of the wings 6 lines. 

 a, Galapagos. Presented by C. Darwin, Esq. 



