LIST OF DIPTERA. 899 



the length of the second joint : bristle very slender, stout at the 

 base, feathered for more than half the length, more than twice the 

 length of the third joint : chest and breast tinged with gray : chest 

 adorned with four slender indistinct black stripes : abdomen green, 

 tinged with white bloom, a little broader but not longer than the 

 chest; first segment dull black: legs black, clothed with black 

 hairs and bristles ; foot-cushions pitchy : wings gray ; wing-ribs 

 tawny ; veins black, tawny towards the base; tip cross-vein straight, 

 forming a very obtuse angle with the fourth longitudinal vein, join- 

 ing the border a very little above the tip of the wing ; lower cross- 

 vein with two distinct curves, the lower inward, the other outward ; 

 scales white, with pale yellow borders. Length of the body 2^ 

 lines ; of the wings 6 lines. 

 a. France ? 



Musca Unxia, n. s., mas. Nigro-cinerea, capite antico ferrugineo, 

 abdomine cyaneo-viridi, palpis fulvis, antennis ferrugineis, pedi- 

 bus nigris, alis subcinereis. 



Body black, clothed with black hairs and bristles : head ferru- 

 ginous and covered with white bloom in front; epistoma not promi- 

 nent ; sides of the face fringed with bristles for one-third of the 

 length : eyes red ; fore part convex, its facets larger than those else- 

 where: sucker black, clothed at the tip with tawny hairs ; palpi taw- 

 ny, beset with black bristles : feelers ferruginous, shorter than the 

 face; third joint more or less pitchy, flat above, slightly convex be- 

 neath, truncated at the tip, full twice the length of the second joint ; 

 bristle ferruginous, feathered with long hairs, about twice the length 

 of the third joint : chest and breast dull black, slightly tinged with 

 gray : abdomen obconical, bluish green, slightly tinged with white, 

 not longer nor 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 an- 

 gle 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 with two distinct curves, the lower inward, 

 the upper outward ; scales slightly gray, with tawny borders. 

 Length of the body 2 lines ; of the wings 4 lines. 



Var. /3. Tip cross-vein straight. 



a. Italy. From Dr. Leach's collection. 



b. France ? 



