496 LfST OF DIPTERA. 



2. DiSCOCEPHALA AmASTRIS. 



Dasypogon Amastris, Cat. of Diptera, Pt. 2, 362. 



Fore fork of the cubital vein almost straight, slightly curved at 

 its base : hind fork and first externo-tncdial vein straight; second 

 extemo-raedial slightly curved ; third inclined towards the fourth, 

 but remote from it ou the border ; subanal joining the anal on the 

 border. 



Mexico. 



3. DiSCOCEPHALA NITIDUS. 



Lutea, nigra vittata; abdomen utrinque alhidum; alee infumata. 

 Dasypogon nitidus, Wied. Aiiss. Zweifl. ii. 613, 60. 



South America. 



A. Thorax dorso rufo. - . - - rufithorax, Wied. 



B. Tliorax flavo quadrivittatus. - - - oculata, Fahr. 



C. Thorax flavo bivitlatus. - - - albo-alra. Walk. 



D. Thorax totus ater. 



A. Alae limpidfe, triente basilari nigra. - - nigrita, Fahr. 



B. Alae nigro-fuscx-, triente apicali sublimpida. apicalis, Walk. 



4. DiSCOCEPHALA KUFITHORAX. 



Niger ; thoracis dorsum el femora anteriora riifa ; aim ftuico- 

 nigrce, dimidio apicali pallidiore. 



Dasypogon rufithorax, Wied. Auss. Zweifi. i. 410, 72. 

 Brazil. 



Var. /3. Femora anteriora nigra. .Aim dimidio apicali limpido. 

 a. Para. From Mr. Bates' collection. 



