364 LIST or DII'TERA. 



21. MVDAS LEUCOPS. 



Nif/cr ; cpistoma allvt kirlutn ; thorax vittis tribuf albo hirtis ; 

 abdomen chahjbeum ; ala sinuato fuscano-Jlaix, margine 

 interno Jlavido . 



Midas leucops, Wied. Nova Acta Acad. Nat. Cur. xv. ], pi. 2 ; 

 Mun. Mid. pi. C>3, f. 10; Auss. Zwe\fi. ii. 628, 32. Wei^tw. 

 Arc. i. 62, 17. 



Brazil. 



22. Mydas virgatus. 



Niger; thorax vittis albo micantibus ; alec infumata;. 



Midas virgatus, Wied. Nova Acta Acad. Nat. Cur. xv. 1 ; Mon. 

 Mid. pi. 54, f. 19 ; Auss. Zweiji. ii. 63, D, 35. Weslw. Arc. 

 i. 53, 30. 



Brazil. 



23. Mydas atbatus. 



Ma.s et Fcera. Niger ; abdomiiiis segmcntum ultimnm supra 

 macula rufescente ; alec fuscce venis obscurius marginatis . 

 Foem.- — Abdomen depressum. 



Mydas atratus, Macq. Dipt. Exot. i. 2, 11, 2. Westw. Arc. i. 



61, 16. 

 ? 



Var. .'' Ater ; caput antice albido pilosutn ; abdominis seguien- 

 tum ultimnm fnlvo marginatum ; al<r purpurco-fuscir, strigis 

 apud areolas posticus pnllitlioribiu:, costa nigro-purpurea. 



Deep black. Head with whitish hairs in front. Eyes bor- 

 dered beneath with white tonientuni. Last abdominal segment 

 with a dull tawny hind border. Wings purplish brown, blackish 

 purple in front ; areolcts along the hind border, and two or three of 

 those in the disk, with nearly limpid streaks. Length of the body H 

 lines; of the wings 14 lines. 



o. Rio Tapayos, Brazil. From Mr. Bales' collectiou. 



