A Monograph of Egypiian Diplera. 25^ 



iiien is c'iothcd wilh vciy inconspicuous wliitish pubesciMice, wliicli 

 i.-, iimcu ionger on the sido margins of the basai segnicnt. 



î.eo-d bright oraiige-yellow \\\\\\ tlie basai two-thirds oi' llic 

 anterior and posterior feinora black ; Ihe liind tibiœ usually hâve a 

 (lark ring or blotch just after their middle. The hind tfiiiora aie 

 slightly thickened about the middle, also the basai joint of Ihc hind 

 tarsi i"s rather swollcn ; pubeseence pale and inc'onspieuous bnt 

 fairly long on the posterior tit)i9e. 



Wings pellucid with llie stignia bidwiiish. Scjnamula^ and 

 haltères yellow. 



Female. — Very siniilur to the nuilc; face soniclimes blaukish 

 but usually yellow at the sides and obscure in the middle. Frons 

 as well as the thorax rather shiniiig bluish-blaek. Scutellum 

 entirely shining eeneous-bhuk witluiut ariy traces of yellow. 



Length from 5 to 6 inui. 



This species seems to be rather i-arc in Cairo aiid ils neigh- 

 boui'hood, bnt fairly common in the Mariout District, whej-c I 

 hâve obtained a small séries in which the tvvo varieties described 

 l)eIow ontnumbered the lype. My records date froni Febi'uai'y 4th 

 lo July 5th. It is known to occur in Africa, throughout Enropo 

 and a large portion of North America, as well as in Souiii 

 America. 



V(ir. trianguliferus Zett., a form in which therc is a l'ather 

 large ferrnginous spot on the third segment of the abdomen. 



Var. hœmorrhousM^iG., another form in which the a.l)domen is 

 brighl red except the basai and the upper ))avt of tlie second 

 .segment. I possess some spécimens wliicli hâve ouly tlie basai 

 segment of the abdomen black and the othei' four segments entirely 

 leddish. 



Thèse two varieties seem to be quite as connnon, if not 

 commoner than the type, but np till now T bave only obtained them 

 from the Mariout district, at the same time as the type. Lately 

 I hâve obtained the tvpe as well as the var. fria/u/i/li fcn/s in tlie 

 Wadi Hoff ami Wadi Rishrash. 



2. P. AEGYPTIUS MA(\), (l'I. TU, hgs. ], ;-),()). 



Macq., Dipt. Exot., 8uppl.4., ]()0.2. (1849); Beck., Mitteil. Zool. 

 Mus. Berl., IL 90.126. (1903); Bez., Uitt. Eritrei. II. 12.1. (1908) et 

 Dipt. Syriaca et ^Egypt., 56. (20). 86. (1909). 



DIAGNOSIS — Face entirely whitish-yellow in both sexes, 

 scutellum with the tip and often ail tlie lower lialf vellow in 

 both sexes. 



