A Monograph of Egyptian Diplera. 85_ 



liave bccn tliat of E. J-liiicafiis. Morocwer, altliough Jœiinicke's 

 description is an excellent oiic for the tinie, it is far from complète, 

 and I do not consicler that there are sufiieienfc grounds for mak- 

 ing another species of it. His "thorax whitish-grey, yellowish 

 liaired, with four shining green -bronze coloured bands, si des of 

 tboiax grey, silver grey haired" is erroneous, as the "whitish-grey" 

 colonr is due to a very fine pulverulence of that colour, which can 

 bo riibbed of f with a fine eaniel-hair brush leaving the black back- 

 ground. Further his "reddish-white" dull bands of the abdomen 

 ïs of rather common occurrence in the females of E. 5-I!neatiis, 

 and in my opinion is due to change of colour in the cuticle simply 

 from the small amount of décomposition which takes place when 

 the insect is drying, which might be somewhat indirectly rdated 

 to the colour and nature of the food of the adult. AU my spéci- 

 mens are mounted on white card dises and in those spécimens 

 which possess the bands of the abdomen reddish instead of white, at 

 the place where the anus comes in contact with the card, it is 

 staiiied reddish. I also possess in my large séries of more than 

 fifty individuals of each sex, several intermediate stages as regards 

 the colour of thèse light abdominal bands and I hâve every reason 

 to believe that spécimens with such colours may be considered, at 

 the most, as forms or varieties of E. 5-lmeatus. 



The species is fairly common in Egypt, especially during the 

 months of September and October, but I possess individuals caught 

 in November, February, March, April, June, July, August and 

 September. However, as a rule it is rare cxcept in the two above- 

 mentioned autumn months. 



It is known to occur in the Ethiopian Région, and Europe and 

 no doubt it exists in other parts of Africa and may occur in other 

 parts of the world. 



3. E. TAENIOPS WIED. (PI. V, fig. 2). 



WiED., Zool. Mag., IL 42. (1819) et Aussereurop. Zweifl., 

 182.43. (1830); Lw., Œfv. Vet. Akad. Forhandl., XIV. 382.39. 

 (1857). Berl. Entom. Zeitschr., II. 230. (1858) et Dipterenf. 

 Sudafr., (396). 324.7. (1860) ; Ricardo, Annal. Mag. Nat. Hist., 

 VII. (7). 106. (1901); Beck., Mitteil. Zool. Mus. Berl., II. 82.115. 

 (1903); Bez., Syrph. Ethiop. Région, 90.91. (Erisfalodcs) (1915). 



SYNONYMY:—œrjyvthis Walk., I>ist Dipt. Brit. Mus., III. 

 (.21. (1849). 



fasciatus Lw., Germ. Fauna, 24.22. (1839)? 



