.1 Monograph of Egyptian Diflera 111 



broad darker stripe in the centre; it is practically free from, pu- 

 bescence except on the central darker stripe, where it is whi 

 and sparse. Hypopygium fairly large, shining aeneous and bi 

 and possessing rather sparse pale pubescence. 



Legs black with the extren 8 tipof the anterior femora and the 



of all the tibiae brownish-yellow, or yellow, as well as the 

 middle metatarsus, and the tips of the other joints of the middle 

 tarsi, and all the tips of the front tarsi; the three pairs of fen 

 are rather swollen ; the hind pair is much more swollen and in 

 addition its lower distal half bears two rows of about eighl sharp 

 spines, between which the tibiae can fold hack ; the hind 

 metal re swollen, a little less than the tibiae and more than 



the following joint of the tarsus, and there is little gradation 

 between these three joints, so that the hind legs appear unusually 

 and clumsy. The joints of all the tarsi bare short, hut 

 distinct, spurs and those on the hind pair are rather hidden by the 

 den.<r pul The pubescence on the upper part and 



the anterior pair of leys is rather short, pale and inconspicuous, 

 while they are quite hate on the under-surface ; on the hind 

 it is rather longer, denser, erect and whitish in colour ; on the 

 base of the upper part of the tibiae on the inside there is a fringe 

 of about six or seven white bristles. 



Wings lather smoky-grevi-h ; subcostal cell darkish-brown 

 and Radius 4- 5 is slightly dipped. Squamulse rather opaque and 



ish, with a yellowish margin ; the alar pair are small and 

 simple whitish fringes; the thoracal pair are much 1 

 and also 3S white fringes which are much longer and co- 



sed of o un ! hairs as in Syritta. Halteres yellow, with a. 

 brown ba 



Female: Very similar to the male hut usually larger. The 



is nol so shining and is entirelj blacl I two thin 



hitish-grey dust on its side margins, which extend : 



I- Tare to i he lower margin of the vertex, where 



they eiul abruptly ; vertex very broad. The punctation on the 



frons, vertex, thorax and abdomen is rather coarser in the male 



and the pubescence on the thorax and abdomen is denser. The 



apex of the abdomen is more pointed 



Length from 7 to 10 mm. 



E. amoenus is the commonest species of this genus in Egypt, 

 and may be found from October to June throughout the Nile 

 Valley from the Mediterranean coast to Upper Egypt and h 

 Fayum. It is rather common in the Mariout district, ft is 

 known to occur in North Africa, Asia Minor and South Europe. 



