88 H. C. EFFLATOUN. 



quadrate spot under the end of the subcostal vein, in which spot 

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

 is prolonged towards the tip of the 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. Squamulaa very pale 

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

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

 thick fringe of longer pale hairs. Haberes pale yellow. 



Female is very similar to the male, but as a rule the eyes are 

 devoid of the golden iridescence, the ground colour of the 

 abdomen somewhat less bright, and the hind legs lighter in colour. 



Length from 11 to 14 mm. 



■■& 



E. tceniops is one of the commonest of the Egyptian Syrphidas 

 and is found nearly 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 Region and Europe, 

 and probably exists in many other parts of the world. 



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



Linn., Syst, Nat., X. 591. (Mused) (1758), XII. II. 984.32. 

 (Musca) (1767) et Faun. Suec, 1799; (Mused) (1761); Reaum., Mem. 



Ins., I. t. II. (1734) et IV t. XX. f. 8. ( ) (1738) ; Swammerd., 



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



II. 520. 52. ( ) (1764); O.F. Mull., Faun. Friedrichsd., 716, 



(Mused) (1764); Fabr., Syst. Entom., 765. 15. (Syrphus) (1775), 

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

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

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

 2870. 32. (Musca) (1788) ; Vill., Entom. Linn., III. 436. 81. 

 (Mused) (1789); Rossi, Faun. Etr., II. 285. 1455. (Syrphus) (1790); 

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

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



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

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

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

 Shaw, Gener. Zool., VI. 380 t. 146. (Mused) (1806); Dwig., Primit, 

 faun. Mosqu., 178. 6G5. (Musca) (1802); Illig., Faun. Etr. Rossi, 

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

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

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

 Lille- 182"- 310. (162). 3. t., III. f. 5. (1827) et Suit, a Buff., I. 



