42 H. C. EFFLATOUN. 



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

 ( = scutellare Fabr.) (1910); Bez., Ditt. Eritrei, II. 14. ( = scutel- 

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

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

 aethiop. Mus. Nat. hungarici, 138 (8) 25. (921). 



SYNONYMY:— longicorne Macq., Dipt. Exot., II. 2., 94.13. 

 t.f. 5. (Syrphus) (1842) ; Beck., Mitteil. Zool. Mus. Berl., II. 84. 

 121. (Syrphus) (1903). 



ffuscotibicde Macq., Dipt., Exot., II. 2.95.14. t. XVI. f. 4. 

 (Syrphus) (1842). 



fnasatum Macq., Dint. Exot., II. 2. 96.15. t. XVI. f. 6. 



{Syrphus) (1842). 



natalense Macq., Dipt, Exot., suppl. I. 134.28. (Syrphus), 

 (1846); Big., Annal. Soc. Entom. Fr., (3)" III. 435. (Syrphus) (1859). 



tfelix Walk., Insect a Sanders., Dipt,, 1.229. (Syrphus) "(1852); 

 Lw. Dipterenf. Siidafr., I. 303.4. (Syrphus) (1860). 



brachypterum Thoms., Eugenics Resa, Dipt,, 496.86. (Syrphus) 

 (1869). 



Pf y -iffori Bio., Annal. floe. Entom. Fr., (0). IV.00.fi. (thjvphm) 

 (1884).' 



senegalensis Guer., Iconogr. d. Regne. Anim., Ins., 545. t 

 XCIX. f. 3. (Syrphus) (1835)/ 



DIAGNOSIS: — This is one of our most elegant and Handsome 

 Syrphids and it may be easily distinguished by the strong spine 

 on the hind trochanter in the male, by the parallel sides of the 

 abdomen, and its bright contrasted colours. 



DESCRIPTION:— Male, (PI. IV, fig. 7 & PI. II, figs. 5 & 6). 

 Face and frons entirely clear waxy yellow with a very 

 short and pale pubescence ; vertex shining black, elongated and 

 possessing very short tawny hairs ; occiput covered with tawny- 

 yellow dust and pubescence which are tawny-yellow above and 

 gradually get paler until they become pure silvery-white below. 

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

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

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

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

 brownish-yellow. 



Thorax shining aeneous-black with bluish or greenish sheen 

 and with broad, conspicuous yellow side-lines which extend from 



