Diptera of St. Vincent {West Indies). 349 



sent in his specimen, as he could hardly have failed to 

 mention it, so conspicuous is it. If his " schwarzlich 

 Erzfarbe^' means bright metallic green, or green-black, 

 then there can be but little doubt that Osten Sacken's 

 A. fracta is the same as A. exotica. In the work cited I 

 mentioned a species from Mexico having an opaque, 

 dark green mesonotum, which I thought might be the 

 true A. exotica. Lynch is wrong in uniting it with the 

 species having a shining mesonotum. 



Mesogeamma. 



Loew, Centur., ii., 290, 1872. 



I have refrained from naming any of the numerous 

 species (with one exception) that have been described 

 from North and South America, in this genus, convinced, 

 as I am, that their great variability will require a thorough 

 monographic treatment, with abundant material, to 

 certainly distinguish them. Many of the species are very 

 abundant in warm, sunny places. 



1. Mesogramma hasilare, var. ? 



Syrphus hasilaris, Wiedemann, Auss. Zw. Ins., ii., 43. 

 Mesogramma soror, Schiner, Nov. Exped., 350. 

 Mesograpta hasilaris, Wuip, Tijdschr., v., Ent., xxxvi., 



40, pi. i., fig. 8. 

 Mesogramma ?, Williston, Biol. Centr.-Amer. 



Dipt., iii., 25. 

 Mesogramma hasilare, Giglio-Tos, Ditt. del Messic, 



ii., 45. 



Hah. Mexico, Brazil, Argentine Republic. 



Ten specimens, labelled ^^Fitzhugh Yalley, 500 feet. 

 Cacao orchard.^^ They differ very materially from the 

 typical forms, but I believe that they represent a variety 

 only. The female described by me in the work above 

 cited certainly belongs with the males, though Giglio- 

 Tos thinks that they differ too much to belong with them. 

 The scutellum in these specimens has a narrow yellow 

 border, and the abdomen is wholly red and yellow, the 

 first segment alone excepted. There is a narrow, black- 

 ish, pre-apical ring on the hind femora, and the hind 

 metatarsi are brownish j otherwise the legs are wholly 



TEANS. ENT. SOC. LOND. 1896. PART III. (sEPT.) 24 



