A Uonograph of Egyptian Diptera. 69 



(>. rsEUDODOKOs BECK. 



Beck., Mitteil. Zool. Mus. Berl., II. 92. (1903). 



This genus is rather closely allied to the genus Baccha Fabr. 

 and still more so to the gênera Doros Macq., and Sixizigaster 

 Rond. It also possesses several eliaracters in common witli the 

 genus Syrjjhus, such as the venation of wings, and the head. The 

 body is practically identical to that of Doros whilst the legs re- 

 niind one of Baccha. 



Becker gives the following table in order to clearly exhibit 

 the characters of this interesting genus: — 



BACCHA DOROS PSEUDODOROS SPAZIGA5TER 



(1) Sides of thorax de- Sides of thorax de- Sides of thorax Sides of thorax de- 

 void of hairs. void of hairs. hairy. void of hairs. 



(•2) Third joint of an- Third joint of an- Third joint of an- Third joint of an- 

 tennœ short and tenna' short and tennm longish and lennu' t^hort and 

 oval oval. oval. oval. 



(3) Arista bare, in.ser- Ari.sta bare, inser- Arisla liare inser- Arisla hairy, inser- 

 ted near the base, ted near the base, ted just before the ted near tiie base 



rniddie. 



(4) Face not project- Face projecting. Face not projecting Face a little pro- 

 ing. jecling 



(5) Piominence of face Proniinence of face Prominence of face Prominence of face 



wart-shaped wart-shaped. nose-shaped as in nose-shaped as in 



Sijrpluts Syrphus 



(6) Abdomen stali< slia- Abdomen robusl, Abdomen clab-sha- Abdomen flattened 



ped, very slender. club-siiaped, ped but much more narrow at base 



slender than in Doros. 



(7) Hind femora strai- Hind femora strai- Hind femora cur- Hind femora slen- 

 ght, without thick- ght, vvith a slight ved, without thick- der, straight, with- 



ening at base. tiiickening at base ening at base out Ihiekening at 



base 



1. P. NIGRICOLLIS BECK. (PI. VI, fig. 5) 



Beck., Mitteil. Zool. Mus. Berl., II. 92. 128. (1903). 



DESCRIPTION: — Maie: Face and frons yellowish-white ex- 

 cept for two fairly shining black spots at the base of the antennœ, 

 which run down the centre of the face, and extend to the upper 

 niouth-edge; pubescenee of face and frons uniformly pale, short, 



