LIST OF DIPTERA. 75 



19. OXYCERA MAC U LATA. 



Fcem. Nigra ; antenna fusco-jiava ; thoracis linea, scutellum, et 

 abdominis macula, pedesque flava ; alee hyalina. 



Oxycera maculata, Oliv. MSS. Macq. Dipt. Exot. i. 2, 190. 

 Carolina. 



West Indies. 

 20. Oxycera Liburna. 

 Oxycera Liburna. Cat. of Diptera, Pt. 3, 528. 



21. Oxycera metallica. 



JEneo-viridis ; antenna nigra ; abdomen chalybeum ; pedes cha- 

 lybei, tarsis posticis basi albis ; ala hyalina, costa nigro-fusca. 



Oxycera metallica, Wied. Auss. Zweifl. ii. 60. 

 Isle St. Thomas. 



Genus 20. HOPLISTES. 



Corpus angustum, lineare. Antennae 7-articulatae ; flagellum 

 fusiforme; arista setiformis, dorsalis, longissima. Thorax pro- 

 ductus. Scutellum bispinosum. Abdomen elongatum. 



Sargus, p., Wied, 



Hoplistes, Macq. Hist, Nat. Dipt. i. 253. 



Mediastinal vein ending at beyond one-third of the length of 

 the wing. Subcostal ending at before half the length. Radial 

 ending at a little beyond half the length. First branch of the 

 cubital ending at much beyond half the length between the radial 

 and the second branch, which ends at a little in front of the tip of 

 the wing. Four incomplete externo-medial veins. Subanal vein 

 united to the anal at some distance from the border. Discal vein- 

 lets forming two sides of the hexagonal discal areolet. Median 

 veinlet distinct. Humeral, subcostal, mediastinal, radial, first 

 cubital, second cubital, prsebrachial, pobrachial, anal, axillary, sub- 

 apical, and discal areolets complete. Four externo-medial areolets, 



H2 



