890 LIST OF DIPTERA. 



ties : feelers black, much shorter than the face ; third joint hardly 

 more than twice the length of the second, flat above, slightly convex 

 beneath, obliquely truncated at the tip : bristle very stout, nearly 

 twice the length of the third joint: chest and breast purple ; disk of 

 the chest bluish green: abdomen purple, obconical, broader and a 

 little shorter than the chest]; its disk above and beneath partly blu- 

 ish green : legs black, clothed with black hairs and bristles; thighs 

 bluish purple: wings colourless; wing-ribs tawny; veins black, 

 tawny at the base; tip cross-vein joined by an outward curve with 

 the fourth longitudinal vein, straight from thence to the tip, joining 

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

 straight for some space from the base, thence slightly curved inward 

 till near the tip, where it has an equally slight, but very short out- 

 ward curve ; scales white, with pale yellow borders. Length of the 

 body 3 lines ; of the wings 7 lines. 

 a. Cape. 



Group III. Pyrellia, Desv. Essai Myod. 462. 



Musca Marsya, n. s. Cyanea, thorace antico vittis duabus purpu- 

 reis, abdominis apiee fulvo, palpis antennis pedibusqu* nigris, 

 alis subcinereis. 



Body bright deep blue, clothed with black hairs and bristles : 

 head black, purple in front ; epistoma not prominent ; sides of the 

 face fringed with bristles for two-thirds of the length : eyes dark 

 red ; facets on the fore part larger than those elsewhere : sucker 

 black, pitchy and clothed with a few tawny hairs at the tip ; palpi 

 black, long, slender, subclavate, beset with black bristles : feelers 

 black, a little shorter than the face ; third joint linear, full four 

 times the length of the second, rounded at the tip ; bristle feathered 

 till near the tip, nearly twice the length of the third joint : chest 

 adorned on the fore part with two purple stripes : breast slightly co- 

 vered with white bloom: abdomen obconical, not louger nor broader 

 than the chest, purplish at the base, bright tawny at the tip, near 

 which there is a gray tinge on each side : legs black, clothed with 

 black hairs and bristles ; kuees dark ferruginous ; foot-cushions 

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

 cross-vein united with the fourth longitudinal vein by a shallow 

 outward curve, having an almost imperceptible inward curve towards 

 the tip, joining the border a very little above the tip of the wing ; 

 lower cross-vein with two very slight curves, the lower inward, more 

 distinct than the other, which is outward ; scales gray, with brown 

 borders. Length of the body 4 lines ; of the wings 8 lines. 

 a. ? From Mr. Children's collection. 



