A Monograph of Egyptian Diptera. 85 



have been that of E. 5-lineatus. Moreover, although Jamnicke's 

 description is an excellent one for the time, it is far from complete, 

 and I do not consider that there are sufficient grounds for mak- 

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

 haired, with four shining green-bronze coloured bands, sides of 

 t hoi ax grey, silver grey haired" is erroneous, as the "whitish-grey" 

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

 be rubbed off with a fine camel-hair brush leaving the black back- 

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

 is of rather common occurrence in the females of E. 5-lineatus, 

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

 from the small amount of decomposition which takes place when 

 the insect is drying, which might be somewhat indirectly related 

 to the colour and nature of the food of the adult. All my speci- 

 mens are mounted on white card discs and in those specimens 

 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 

 stained reddish. I also possess in my large series of more than 

 fifty individuals of each sex, several intermediate stages as regards 

 the colour of these light abdominal bands and I have every reason 

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

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



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 except in the two above- 

 mentioned autumn months. 



It is known to occur in the Ethiopian Region, 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., II. 42. (1819) et Aussereurop. Zweifl., 

 182.43. (1830); Lw., CEt'v. Vet. Akad. Forhandl., XIV. 382.39. 

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

 Siidafr., (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. Region, 90.91. (Eristalodes) (1915). 



SYNONYMY:— csgyptius Walk., List Dipt. Brit, Mus., III. 

 (.21. (1849). 



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



