H. C. EFFLATOUN. 



quadrate spot under llio end of tlie subcostal veiii, in whieh spot 

 there is a distinct cross vein ; the veinlet after the closed cell RI 

 is prolonged towards the tip of tiie wing and this prolongation is 

 about half the length of that in E. tenax. Vena spuria rather 

 faint and very pale yellow; Anal 2, undulated. Squamulse very pale 

 yellow, thoracal pair very large with a dark brown edge and with 

 a fringe only on the lower half; alar pair much snialler with a 

 tliick fringe of longer pale hairs. Haltères pale yellow. 



Fei/ialc is very similar to the maie, but as a nile the eyes are 

 devoid of the golden iridescence, the ground colour of the 

 abdomen somewhat less bright, and tlic liind legs lighter in colour. 



Length from 11 to 14 mm. 



E. tœniom is one of the commonest of the Egyptian Syrphidse 

 and is founclnearly the whole year round. My records date from 

 October to the middle of August. It is very widely distributed 

 and has been recorded from the Ethiopian Région and Europe, 

 and probably exists in many other parts of the w^orld. 



4. E. TENAX L. (PI. V, fig. 1). 



LiNN., Syst. Nat-, X. 591. {Musca) (1758), XII. IL 984.32. 

 (^Musca) (1767) et Faun. Suec, 1799; {Musca) (1701); Réaum., Mém. 



Ins., L t. IL (1734) et IV t. XX. f. 8. ( ) (1738) ; Swammerd., 



Biblia Nat., I. t. XXXVIII f.g. ( ) (1737); Geoffr., Hist. Ins., 



IL 520. 52. ( ) (1764); O.F. Muu.., Faun. Friedrichsd., 716, 



(MM.sTa) (1764); Fabr., Syst. Entom., 765. 15. {Sijrphus) (1775), 

 Spec. Ins., IL 425. 19. (Syrphus) (1786), Entom. Syst., IV. 288. 36. 

 (Syrphus) (1794) et Svst. Antl, 238. 24. (1805); Harr., Expos. 

 Eng. Ins., 41. t. X. (2) f. 1. {Musca) (1776); Gmell., Syst. Nat., V. 

 2S70. -S'I. (Musca) {178S); Vill., Entom. Linn., III. 436. 81. 

 (Musca) (1789); Roasi, Faun. Etr., H. 285. 1455. {Syrphus) (1790); 

 Panz.. Faun. Germ., XIV. 23. 24. {Syrphus) (1794); Cederh., Faun. 

 Ingr. Prodr., 303. 952. {Syrphus) (1798); Schrank, Fauna boiea, 

 III. 113. 2427 {Musca) (1803); Schell., Genr. Mouch. Dipt., 52. t. 

 IX. f. 1. {Syrvhus) (1803); Latr., Hist. Nat. Crust. Ins., XIV. 

 364. 3. (1804) et Gen. Crust. Ins., IV. 324. {Elophilus) (1809); 

 Shaw, Gêner. Zool., VI. 380 t. 146. {Musca) (1806); Dwic, Primit. 

 faun. Mosqu., 178. 635. {Musca) (1802); Illig., Faun. Etr. Rossi, 

 IL 441. 1455. {Syrphus) (1807); Donov., Brit. Ins., XVI. 66. t. 574. 

 {Musca) (1883); Fall., Dipt. Suec. Syrph., 26. 17. {Syrphus) (1817); 

 Meig., System. Beschreib., III. 385. 4. (1822); Macq., Rec. Soc. Sci. 

 Lille. 1827. ^U). (162). 3. t., NI. f. 5. (1827) et Suit, à Buff., I. 



