.1 Monograph of Egyptian Diptera. 63 



DESCRIPTION : — Male "Face orange, bearing grey dust and 

 'a slight pale pubescence; jowls usually tinged with black, but 

 'often on only the separating off space near tbe lower front corner 

 'of the eye ; there are no long black hairs overhanging the eyes 

 'on their upper part; the vertex is dusted aeneous, narrow and pale 

 'haired on at any rate its front part. Frons often more or less 

 'greyish black and dusted on its upper part, but shining orange 

 'just above the antenna? ; its pubescence is black and fairly long. 

 Antennae orange, often with the upper part or even more of the 

 'third point brownish or even brownish-black ; arista varying from 

 'yellowish brown to black. 



"Thorax shining aeneous with three faint pale greyish lines 

 'on the fore part, the middle line narrow and the other two broad ; 

 'the pubescence is erect, tolerably abundant but not conspicuous, 

 'all yellowish. Scutellura with longer, almost all black, pubescence 

 'Abdomen almost linear, but slightly broadest about the end of the 

 'second segment; the second segment has the yellow basal corners 

 'connected along the sides with the broad pair of yellow spots on 

 'the disc ; the third and fourth segments have the entire fore 

 'margin yellow as well as a broad middle band, thus leaving the 

 'entire hind margin black as well as a narrow line near the base 

 'which does not reach the side-margins, the broad yellow band is 

 'at its middle slightly produced in front and slightly emarginate 

 'behind ; the fifth segment is all orange except a basal middle 

 'black spot. Pubescence mainly the same as the ground colour but 

 'there are a few black bristles down the middle and on the orange 

 'part of the fourth segment. Genitalia orange and black. 



"Legs long and thin, all orange except the blackish coxae and 

 'trochanters and the rather obscurely orange hind tarsi ; pubes- 

 'cence moderate, the long hairs on the femora yellow except usually 

 'a few blackish hairs behind the middle femora after the middle, 

 'and in front of the hind femora near the tip ; the tiny bristles 

 'about the tip of the middle femora, and in front of and all about 

 'the tip of the hind femora are black, as are also usually all those 

 'down the top and front of the hind tibiae, which almost forms a 

 'ciliation down the front of the tibiae ; the basal joints of the hind 

 'tarsi long and thin. 



"Wings slightly brownish, with the subcostal cell and stigma 

 'distinctly darkened ; Radius 4-5 very nearly straight, Squamulae 

 'yellow. Halteres orange. 



Female. — "Similar but the orange markings are usually less 

 'extensive and those on the front margin of the third and fourth 

 'segments are somewhat contracted about the middle, and the black 

 'line which follows extends over the side-margins, while the black 



