698 LIST OF DIPTERA. 



poisers tawny. Length of the body 5i lines; of the wings 12 



lines. 



a. Brazil. 



Trichopoda umbra, n. s. Atra, f route cano pubescente, vittuque 

 duabus aureis ornato, thoracis vittis quatuor fasciaque una aureis, 

 abdomine fusco pubescente, antennis nigris, articulo 2° basifulvo, 

 pedibus nigris, alis nigris marginibus posticis limpidis. 

 Body deep velvet-like black : head clothed with a few black 

 hairs ; front covered with hoary down, adorned on each side with a 

 stripe of pale golden down ; mouth pitchy, clothed with short tawny 

 hairs; its cavity tawny, eyes pitchy: feelers black; third joint 

 tawny at the base : chest beset with some black bristles, adorned 

 with four golden stripes, which are joined together behind by a gol- 

 den band ; the pair of stripes on the back are in advance of the side 

 pair : abdomen clothed with short black hairs, and excepting a 

 middle stripe, covered with brown bloom, and on the last segment 

 with pale tawny bloom : legs black, clothed with short black hairs ; 

 trochanters ferruginous ; foot-cushions and claws pale yellow ; tips 

 of claws black; hind shanks fringed with tufts of black hairs: 

 wings black, colourless along the hind borders ; wing-ribs and veins 

 black ; scales yellowish brown ; poisers tawny. Length of the 

 body 3^ lines ; of the wings 7 lines. 

 a. Venezuela. From Mr. Dyson's collection. 



Trixa, Meigen. 



Tbixa lateralis, n. s. Cinerea, thoracis vittis quatuor nigris, lateri- 

 bus scutelloque ferrugineis, abdomine cano-cyaneo, antennis fer- 

 rugineis, articulo 3° nigro, pedibus ferrugineis, femoribus basi 

 nigris, alis limpidis. 



Head black, clothed with black hairs ; peristoma and face fer- 

 ruginous ; sides of the face fringed with bristles along half the 

 length from the base : sucker black, clothed at the tip with short 

 tawny hairs ; palpi ferruginous, clothed with black hairs : eyes 

 pitchy : feelers ferruginous, half the length of the face ; third joint 

 black ; bristle black, more than twice the length of the third paler 

 joint: chest gray, clothed with short black hairs, adorned with four 

 black stripes ; sides and scutcheon ferruginous : abdomen bluish 

 black, with hoary reflections, clothed with short black hairs : legs 

 ferruginous, clothed with black hairs and bristles ; thighs black to- 

 wards the base ; claws ferruginous, with black tips ; foot-cushions 

 pale tawny : wings colourless ; wing-ribs and veins tawny ; veins 



