874 LIST OF DIPTERA. 



"base : eyes purplish red ; fore part flat, composed of larger facets 

 than those elsewhere : sucker black, pitchy and clothed with tawny 

 hairs at the tip ; palpi tawny, with black tips, beset with black 

 bristles : feelers black, shorter than the face ; second joint dark fer- 

 ruginous : third joint full four times the length of the second, 

 slightly decreasing in depth from the base to the tip, which is 

 rounded ; bristle black, very much longer than the third joint : 

 chest bluish green, tinged with purple on each side, adorned with 

 four broad hoary stripes ; breast partly covered with hoary bloom ; 

 disk of the scutcheon purple : abdomen elliptical, brassy green, a 

 little shorter than the chest, covered with hoary bloom ; a slender 

 blue stripe on the back ; its base and the hind borders of the seg- 

 ments also blue : legs black, clothed with black hairs and bristles ; 

 shanks dark ferruginous ; foot-cushions pitchy ; a broad, dark 

 tawny band round each of the four hinder thighs : wings slightly 

 gray ; shoulders tawny ; wing-ribs and veins black ; tip cross-vein 

 forming a very slightly obtuse angle with the fourth longitudinal 

 vein, a little curved inward for a short part of its length, straight 

 from thence to the tip, joining the border a little above the tip of 

 the wing ; lower cross-vein with an almost imperceptible inward 

 curve along half its length, and having thence to the tip a very 

 slight outward curve ; scales pale yellow, with darker borders. 

 Length of the body 3i lines ; of the wings 7 lines. 

 a. Monte Video. Presented by C. Darwin, Esq. 



Musca Verena, n. s., fern. Purpureo-cyanea, capite nigro supra fer- 

 ragineo, thorace vittis quatuor canis, scutello purpureo, abdomine 

 cyaneo-viridi, basi cyaneo, macula utrinque cenea, segmentation 

 marginibus posticis purpureis, palpis fulvis, antennis pedibusque 

 nigris, femoribus ferrugineo cinctis, tibiis ferrugineis, alis sub- 

 cinereis. 



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

 vered with pale yellow bloom, tawny and clothed with yellow hairs 

 on each side of the peristoma ; a very broad ferruginous stripe 

 fringed with bristles between the eyelets and the feelers ; epistoma 

 prominent ; sides of the face fringed with very short bristles, and at 

 the base with longer bristles : eyes dark red ; fore part flat, and 

 composed of larger facets than those elsewhere : sucker black, 

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

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

 nous towards the tip ; third joint full thrice the length of the se- 

 cond, flat above, slightly convex beneath, decreasing in depth to- 

 wards the tip, which is rounded ; bristle black, very much longer 

 than the third joint : chest and breast deep purplish blue ; chest 



