A Mojiograph of Egyptïaii Diptcra. 83 



(hc sccoikI, but the black baml wliicli oiiginates t'roni thc upper 

 inargiii does iiot extend move than a fourtli of the way to the 

 sides, aud it is interrupted a little higlier up than tlie niiddlc of 

 tlie segment by a transverse, yellowisli, dull band ; also the bkick 

 inarkings on the lower end of this segment is nuich deeper than on 

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

 is shining teneous-bkick with a fairly thick, yellowish-grey trans- 

 verse band which is situated in the iipper 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, 

 >vhich is longer on the "fourth segment than on any of the others. 

 Venter dull yellow, but shining towards thc middlc of the last 

 tbree segments ; its pubescence is not so dense as on the al)domen, 

 i,UL l'.n;?:€r. Hypopygium is asyn)Hrctrical, shining ])ronze and 

 p;ii1ly cov-^red with greyisb dust. 



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

 the l)asa] third of tlie pcsterior tibise and the basai halves of the 

 anterior tibise are yellow; tarsi also shining bronze-black except tlie 

 basai half of the metatarsus, which is rusty-A'cllow. rul)cscence 

 on legs fairly abundant, soft and pale, except ou tlie inner sides 

 of tJie posterior tibîae, black ; however in many spécimens there are 

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

 tibiœ and metatarsi. 



Wings pellucid with llic ccsta yellov,n"sh .^fjimmula? yellowish- 

 white with a vellow fringe. Haltères yellowish. 



Veinule: The fcmale is not very much unlike the maie, but 

 usually the abdominal markings are rather différent, 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 médian stripe) 

 become expanded, joining with the stripes on each sid.e and with 

 the médian one, thus forming an irregular light groy band; indeed 

 thèse bands are sometimes so évident tlaat it givcs one thc appear- 

 ance of the thorax being whitish-grey with four shining seneous 

 broad longitudinal stripes ; thus Jaennicke fell into this error and 

 in his original description of E. tahanoïdes, lie 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 yeliowish-white, of ten pure white band, which is constricted in 

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



