LIST OF DIPTERA. 387 



South Kussia. 



22. DiOCTHIA PICTA. 



Mas. Nigra ; fades nivea ; abdomen incisuris dtrinis maculisque 

 in singula segmento binis transversis albis. 



Dioctiia picta, Wied. Dipt. Exot. i. 180, 1; Auss. Ziveifi. i. 

 364, 1. 



North America. 



23. DiocTRiA Albius. 



Dioctria Albius, Cat. of Diplera, Pt. 2, 301. 

 New York, 



24. Dioctria octopunctata. 



Nigra ; thorax fiavidn vittatus ; abdomen utrinque maculis quatuor 

 albis ; pedes mellei. 



Dioctria octopunctata. Say, Journ. Acad, Philad. iii. 49, 1. Wied. 

 Auss. Zweijl. i. 365, 3. 



North America. 



South America. 



25. Dioctria tenuis. 



Dioctria tenuis, Diptera Saundersiana, Pi. 2, 86. 



a, b. South America. From Mr. Saunders' collection. 



26. Dioctria vicina. 



Nigra, nitida ; fades albida ; pedes rufi, femoribus antids fasda 

 nigricante ; alee nigra. 



Dioctria vicina, Macq. Dipt. Exot. i. 2, 26, 2. 

 Dioctria celandica, Var.? 



Brazil. 



