A Monograph of Egyptian Diplcra. 59 



51. 64. t. fi^'. 5. (1863); Rond., Atti. h^oc. Ital. Sci. Nat. Milano, 

 XT. 26. (1868). 



= excisus ScHiN., Fauna Austr., Dipt., I. 311. 42. var. (1862). 



= flmicei7s^om)., Dipterol. Prodr., 11. 133. 18. (1857). 



= var.rnfimtsafi/y Bm.. Annal Soc. Entom. Fr., ((>) IV. 88. 4. 

 (1884). 



= vai-.ul(jirus MAcq., Explor. Scient. Alg., Zool. III. 469. 172. 

 t. IV. fig. 11. (1849); Beck., Mitteil. Zool. Mus. P>erl., II. 84. 

 120. (1903); Verr., Brit. FI., VIII., Cat. Syrph., 61. (1901). 



DIAGXOSIS: — Length of abdomen more than twiee its 

 breadth; abdominal l)ands verv conspienous, always separatetl into 

 lunules in tlie female, tbough often connected in tbe inale and 

 which extend over tbe side margins. Maie witb very large genitalia. 



DESCRIPTION. ■~3Iale: Face and Irons entirely orange-yel- 

 low, but i'rom tbe front moutb-edge tbere is a blackisb line run- 

 ning about half way up tbe face, whicb becomes gradnally narrow 

 and brownish above and tben dies ont; tbe jowls are also blackisb. 

 Tbe pubesoence on tbe upper part of tbe frons is black and' con- 

 spienous down to below tbe antennas at tbe sides, but a large space 

 above and immediately below tbe antennae is quile bare; lower 

 down tbe bairs on tbe sides of the face are very pale and in- 

 conspienous; the pubescence on the jowls and on tbe lower part of 

 tbe occiput is yellowisb or almost wbite, but it becomes darker, al- 

 most orange on tbe upper part, and witb no black bairs overbang- 

 ing tbe eyes. Vertex black and possessing black bairs. Eyes quite 

 bare. Antennse dark brown, but brownish-orange on tbe ventral sur- 

 face, which colour is often restrictcd to the base of the third 

 joint, but sometimes it is extended below, on the sides and above, 

 so that the antennse appear reddish-brown ; arista rather short, 

 brownish-orange and situated on the oval third joint, at a point 

 about one-tbird of its length from the base. Thorax moderately 

 shining aeneous-black ; its pubesoence is fairly dense and entirely 

 tawny or yellow; scutellum brownish-yellow witb entirely yellow 

 pubesoence. Abdomen ovate, about as long as the head and thorax, 

 but rather flat, and wider than the head and thorax; it is dull 

 black except at the base, apex, side margins, and on the hind- 

 margin of the fourth segment, wliere it is shining; there are three 

 pairs of orange markings, often varying greatly in size, followed 

 by two orange hind margins; the markings on the second segment 

 are the smallest, sloping slightly downwards, widely separated 

 and connected at their bighest point witb the side margins; the 



