.1 Monograph of Egypt hut Diptera. 83 



the second, but the black band which originates from the upper 

 margin does not extend more than a fourth of the way to the 

 sides, and it is interrupted a little higher up than the middle of 

 the segment by a transverse, yellowish, dull band ; also the black 

 markings on the lower end of this segment is much deeper than on 

 the second segment and has a metallic sheen. The fourth segment 

 is shining aeneous-black with a fairly thick, yellowish-grey trans- 

 verse band which is situated in the upper two-thirds of the 

 segment and slightly drawn forward in its centre ; this segment 

 (as well as the third segment) possesses a light yellow pubescence, 

 <\ hich is longer on the fourth segment than on any of the others. 

 Venter dull yellow, but shining towards the middle of the last 

 three segments ; its pubescence is not so dense as on the abdomen, 

 but longer. Hypopygium is asymmetrical, shining bronze and 

 partly covered with greyish dust. 



Legs shining bronze-black, except at the tip of the femora ; 

 the basal third of the posterior tibiae and the basal halves of the 

 anterior tibiae are yellow ; tarsi also shining bronze-black except the 

 basal half of the metatarsus, which is rusty-yellow. Pubescence 

 on legs fairly abundant, soft and pale, except on the inner sides 

 of the posterior tibiae, black ; however in many specimens there are 

 Mack hairs intermingled with the pale ones, even on the anterior 

 tibiae and metatarsi. 



Wings pellucid with the ccsta yellowish. Squamulas yellowish- 

 white with a yellow fringe. Halteres yellowish. 



Female: The female is not very much unlike the male, but 

 usually the abdominal markings are rather different, with the 

 addition of white colour to the yellow and black. The 

 five longitudinal, dull, whitish-grey stripes of the thorax 

 are much wider and more conspicuous, and at the hind-margin the 

 two intermediate ones (one on each side of the median stripe) 

 become expanded, joining with the stripes on each side and with 

 the median one, thus forming an irregular light grey band; indeed 

 these bands are sometimes so evident that it gives one the appear-' 

 anoe of the thorax being whitish-grey with four shining aeneous 

 broad longitudinal stripes ; thus Jaennicke fell into this error and 

 in his original description of E. tabanoides, he describes the 

 thorax as such : "Thorax whitish grey, yellow haired, with four 

 large shining green-bronze coloured stripes..." The first segment of 

 the abdomen is whitish-yellow, almost white, and somewhat dark 

 opaque grey towards the centre. The second segment is reddish- 

 yellow (sometimes it is quite red) and is traversed in its middle by a 

 dull yellowish-white, often pure white band, which is constricted in 

 the centre and as a rule extends to the side margins ;the lower margin 



