Blptera of St. Vincent {West Indies). 849 



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 shiniug mesonotum. 



Mesogramma. 



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 sorer, Schiner, Nov. Exped., 850. 

 Mesograpta basila7-is,Wu.\p, Tijdschr., v., Ent., xxxvi., 



40, pi. i., fig. 8. 

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



Dipt., iii., 25. 

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



ii., 45. 



Hah. Mexico, Brazil, Argentine Republic. 



Ten specimens, labelled "Fitzhugh Valley, 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 ; otherwise the legs are wholly 



TRANS. ENT. SOC. LOND. 1896. PART HI. (sEPT.) 24 



