A Monografh of Egypiian Diptera. 39_ 



daik s))eciiiicns laay liavo orange tarsi and pale spécimens dark 

 tarsi. 'i'iie pubcseence on the front fcniora is eithcr cntirely yellow 

 or with thé minute hairs l)laek hek)\v; behind the middlc i'emora 

 tlie pubescence is longer and blaek from the troehanters to tlie 

 end of the tarsi; e.\cc})t on the inside of the hind tibiae on the 

 apical half. 



Wings rather grcyish, pellucid, with the extrême base 

 orange and the stigma yellow ish-brown. Squamulae with their 

 margins and fringes yellow ish. Haltères pale yellow. 



Female, (P1.III_, fig.8), Rather similar to the maie exeept for the 

 shape and markings of the abdomen. The f rons is moderately broad 

 at the vertex and vcry shining œueous for the entire width of the 

 upper half, which is continued on about the middle third almost 

 to the antennœ; its pubescence is short, inconspicuous and fol- 

 lows the ground colour. 



Abdomen more even in shape, less clubbed and not so con- 

 stricted about the middle. The orange markings on the segments 

 are very variable; the side margins of the first segment are yel- 

 low and tliose of the second segment are very similar to those 

 in the maie but rather broader and sometimes interrupted; the 

 band on the third segment is also either entire or interrupted, and 

 arched from near the hind margin at the si des, to near the front 

 margin in the middle; the band on the fourth segment is similar 

 but broader and hence occupies more of the segment and wheu it 

 is interrupted in the middle it has small projections near the 

 middle, both above and below ; on the (ifth segment the band has 

 thèse projections increased so that the segment is ail orange ex- 

 cept for a black dorsal line, the basai corners, and the two large 

 cornei'S of the hind margin; the sixth segment is entirely orange 

 except for a broad black dorsal line and two round brownish-black 

 spots on the sides and at the end of the dorsal line. Pubescence 

 also pale about the basai corners and about the sides down to the 

 end of the third segment; l>elo\v tins it is longer than în the maie 

 and entirely blackish. 



Leiigth from 8 to G nnn. 



Var. calceolata Macq., (Pl.III, fig.lO), I do not consider this to be 

 anything but a dark variety of the above species in which the femora 

 are considerably darkerandthe abdomen with the orange markings 

 less extensive, thus leaving the abdomen darker but with the 

 orange markings also greatly varying in almost every individual. 

 This variety seems to correspond almost exactly with the European 

 var. nitidicoUis Zett. of .S', flavicauda. In some of my spécimens 

 the abdominal markings of the malc run together, i.e. the orange 



