48 H. C. EKFLATOUN. 



{Syrjjhus) (1897); Plateau, Mém. Soc. Zool. France, 1900. 277. {Syr- 

 fhus) (1900); Verr., Brit. FL, VIII. 334. l.f. 278-279. (Catohomba) 

 (1901); How., Ins. Book, t. XXI. f. 27. (1902) ; Aldrich, Cat. N.A. 

 Dipt., 363 (1905); Bez., Dipt. Syriaca et .Egypt., 93. 57. (1909), 

 Ditt. raccolti d. Léo Fea, (407). 6. 8. (1912) et Svrph. Ethiop. Reg., 

 3. 25., 31. (1915); Beck., Bez., Kert. u. Stein, Kat. Palœarkt. 

 Dipt., 111.55.(1907); Kert., Cat. Dipteror., VII.98.(1910); Osburn., 

 Joiirn. N. Y. Entom. Soc, 58 (1910); Lundb., Dipt. Danica, V. 261. 

 263, f. no, 117. (1916). 



SYAONYMY:^affinis S.U'., Journ. Acad. Philad., III. 93. 9. 

 {Syrphui,-) (1823) et Compl. Writ., II. 81. {Syrp/ius) (1859); Wied., 

 Ansserourop. Zweifl, IL 117.2. (Syrphus) (1830). 



mellinu^ Harr., Expos. Engl. Ins., 30. t. XXIV. f. 23. (Miisca) 

 (1776). 



rosa- 1 )!■:<;., Ins., VI. 108.5. t. VI. f. 15-19. {Musc,) (1776). 



Iniiisjirju^ Fabr., {nec. L), Entom. Syst., IV. 306. 104. (,S>/'- 

 phus) (1794) et Syst. Antl., 250. 5. {Scœva) (1805); Ketel, Pro- 

 gramme Pasewalk, 9, [Syrphus) (1903). 



T'ir. l/ono^Ti/tell(ifns Girschn., Wien. Entom. Zeitg., III 

 197. II. (,S7//7;////,s-) (1884). 



rar. iiiiicolor CiRT., Brit. Entom., 509. (Scœva) (1838); Verr., 

 Entom. Mon'.hly Mag., V. 21. (Syrp/ius) (1869). 



DIAGXOSIS: — Yellow bands absent on sides of thorax ; abdo- 

 minal hinules more or kss narrow, those on the third and fourtli 

 segments much arcb.cd, their inner ends very rarely touching the 

 hind margins. 



DKSCRII'I l()\: M'ilr: Ilrad wider than th? thorax and as 

 w'nlc as Ihc \vid:st part of the abdomen. Face greyish-ycllow with a 

 narrow brownish middle line which extsnds to about half way between 

 the mouth and the antsnnae, bnt which is partially continued be- 

 low, round the moutli edge and more widely across to the eyes, 

 Frons so large and inflated that the face actually diminishes in 

 width fiom the frons ail the way down to the mouth. The frons is 

 flatker colonrsd than the face and is densely and conspicuously 

 clothed with blackish erect pubescence. Pubescence on the face 

 rather dense and varying from bcing almost uniformlv wdiitish and 

 inconspicuoiis, to being blackish on the sides and middle, but yel- 

 low bîtwe^n and below. On the jowls, the pubescence is pale, be- 

 coiiiing ahiiost v. '-ite on the occiput, but yellow again near the up- 

 per part of the occiput, with a few longer, almost black hairs 

 overhanging the e3'es. Vertex black with blackish pubescence on 



