368 Msr OF DiPTEnA. 



B. Abdomen piceuni, fascia lata basali nigra, limpidipennis, IVestw. 

 c. Abdomen non fasciatum. 



A. Thoracis lalera alba. - - . . viduatns, Wi-slir. 



B. Thorax maculis se.x albis. - - concinnus, Macfj. 



C. Thora.K maculis fulvis. 



A. Ahc fulv;c. - - - - - melleipcnni<, Weslw. 



B. Alac limpida;. - - . . bispinifer, Westw. 



D. Thorax lotus liiger. - - . - sordid us, Weslu-. 



35. Mydjs stenoo.vster. 



Niger, alhido selnsus; fades barba densa albida insila ; thorax 

 maculis duabus parvis in margine anlico albo squamosis, 

 allerisque duabus versus basim alarum ; abdomen i-ulde elon- 

 gatum, segmrnto antico albo piloso, 2o nigro, 3o obscure rufo, 

 lateribiis nigris albo maculatis, cateris saugiiineis, singula 

 ad basim utriuque macula pai-va alba ; pedes piceo-sanguinei ; 

 al(C subhyalina. 



Midas stenogaster, Westw. 

 Swan River. 



36. MyDAS BICOLOK. 



Niger, albo pilosus ; fades barba deiisa albida ; abdomen segmen- 

 tis 5 posticis sanguineo-rufis ; pedes sanguineo-rufi, tarsis 

 pnullo obscurioribus ; alee ht/alina, venis Jlavido-fuscano 

 margiiuitis. 



IMidas bicolor, Westw. 



37. Mydas auripennis. 



Niger, caput, antenna, prothorax, thoracis anguli antici, abdo- 

 men el pedes hele fulva ; mesoslerni latera unispinosa ; abdo- 

 men b"si fasciisque duabus nigris ; femora basi nigra ; al<r 

 aurirolores, macula verstis coslce apicem nigra, margine intirno 

 pellucido. 



Miilas anriponnis, Westw. Lond. and Edinb. Phil. Mag. 183;') ; 

 Arc. i. ol, 13, pi. 14, f. 1. 



Cubital vein divided, and forming a small closed oval areolct. 

 New Holland. 



