294 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



Syrphus tarsatus. 



Syrphus tarmtns Zotterstedt, Ins. Lapp., GOl, 2: Dipt. Scand., 730, 33; Staeger, 

 Groeul. Antl., 3(50, 27. 



Habitat. — Europe, Gieeulaiid. 



Length, 8""" to 9™"\ Sliiuiug metallic, blackish-greeu. Eyes pilose. 

 Face yellow, oral margin black. Antennce blackish. Abdomen with 

 three straight, interrupted bands. Legs reddish-yellow ; base of femora 

 and tarsi black; hind tibise with a brown or blackish ring. Scutellum 

 yellow. 



Syrphus diiridiatus. 



Syrphus dimidiatus Macquart, Hist. Nat. Dipt., i, 537. 



Habitat.— Georgui (Macq.). 



Length, ICo™"". Black, sides of the face whitish. Third joint of 

 antennae reddish below. First band of abdomen interrupted, the others 

 broad, entire. Legs yellow; hind pair and base of front femora black. 

 Wings brown on the anterior part.— Macquart. 



This description is not sufficient to admit of identification. 



MESOGRAPTA. 



Mesograpta marginata. 



The following synonym was omitted under this species : 



Syrphus limhiventris Thomson, Eugenies resa, 485, 83. — California. 



Mesograpta coalescens. 



Syrphm coalescens Walker, Dipf. Saunders, 237.— North America. 



Mesograpta corbis. 



Syrphus corMs Walker, Dipt. Saunders, 237.— North America. 



"Both are Mesograptce, each represented by a single specimen in the 

 British Museum. I find in my notes that both produced on me the im- 

 pression of M. Boscii, although the description of S. coalescens reads 

 more like that of M.planiventris Loew ; the female described by Walker 

 is probably a different species."— Osten Sacken, Cat. Dipt., 125, note. 



COPESTYLUM. 



^Nlacquart's figure of C.flaviventris shows as much resemblance to C. 

 Umhipennis as it does to C. marginatum, but the descriptions will not 

 apply to the former at all, especially as regards the structure of the 

 antennae. 



