42 H. C. EFFLATOUN. 



{ = scutellare Fabr.) (1907); Keut., Catal. Dipteror., VII. 150. 

 { = scutc'llure Fabr.) (1910); J3ez., Ditt. Eritrei, IL 14. { = scutel- 

 lare Fabr.) (1908), Ditt. raccolti d. Léo. Fea, la. 10.11., (409), 

 (410),. 8. (1912), Syrph. Ethiop. Région, 36.37.31. (1915) et Syrph. 

 iethiop. Mus. Nat.' hiingariei, 138 (8) 25. (921). 



SY SOSY MY :—lon(jicorne Macq., Dipt. Exot., IL 2., 94.13. 

 t.r. 5. {Syri>hui<) (1842)"; Beck., Mitteil. Zool. Mus. Berl., IL 84. 

 121. {Syryhus) (1903). 



ffuscotihuUe Macq., l)i))t., Exot., IL 2.95.14. t. XVI. f. 4. 

 (Syrphus) (1842). 



fnasatum Macq., Dii)t. Exot., II. 2. 9(),15. t. XVI. f. 0. 

 (Syrjjhns) (1842). 



natalertse Macq., Dipt. Exot., suppl. I. 134.28. {Syrphus), 

 (1846); Jiic, Annal. Soc. Entom. Fr., (3). 111.435. {Syrfhus) (1859). 



ffdix Walk., Insecta Sanders., Dipt., 1.229. {Syrphus) '(1852); 

 Lw. Dipterenf. Sùdafr., I. 303.4. {Syrphus) (1860). 



brach.ypferum TnoMS., Eugenies ïiesa, Dipt., 496.80. {Si/rphus) 

 (1809). 



Pfeifin-Î Bic, Annal. Soc, Entom. Fr., (6). IV.89.5. {Syrphus) 



(1884). 



seu('(fal('usis Gukr., Iconogr. d. Rogne. Aniin., Ins., 545. t 

 XC'IX. i. 3. {Syrphus) (1835). 



DU GXOSIS: — This is one of our most élégant and fiandsome 

 Syrj)hids and it may be easily distinguishcd by tbc strong spine 

 (»n thc liind trocbanter in the maie, by the pai-allel sides of the 

 ;d)domeii, and its hriglit contrasted colouvs. 



DESCRIPTIOX:— .Vale, (PI. IV, lig. 7 & PI. II, figs. 5& 6). 

 Face and frons entirely clear waxy yellow witb a vcry 

 short and pale i:)ubescence ; vertex shining black, elongated and 

 possessing very short tawny hairs ; occiput covered with tawny- 

 yellow dnst and pnbescence which are tawny-yellow above and 

 gradually gst paler until thcy become pure silvery-wliite below. 

 Eyes bare and touching for a distance eqiuil to about the length 

 of the frons. Antennse reddish-yellow or reddish-brown with the 

 dorsal side of the three segments brownish; the two basai segments 

 bear numerous small black bristles ; arista rathcr short, bare and 

 brownish-yellow. 



Thorax shining ooncous-black with bluish or greenish shoen 

 and with hioad, conspicuous yellow side-lincs which extcnd from 



