42 PROF. M. BEZZI. 



9(14). Apex of the wings with the usual blackish fork ; base of the first posterior 



cell with a single hyaline spot of greater size. 

 10(13). Species of greater size, measuring 3-4 mm. in length ; ovipositor short 



and flattened. 

 11(12). Ground-colour of thorax and abdomen fulvous . . . . aira, Walk.* 



12(11). Ground-colour of thorax and abdomen black . . . . peregrina, Ad. 



13(10). Species of smaller size, 2-3 mm. in length ; ovipositor longer than the 



abdomen and cylindrical . . . . . . . . urophora, sp. n. 



14(9). Apex of the wings entirely hyaline and devoid of the usual fork ; base 



of the first posterior cell with 2 hyaline spots. 

 15(18). There is a narrow but distinct dark streak extending obliquely from the 



stigma to the small cross-vein ; macrochaetae yellowish. 

 16(17). Lower angle of the anal cell a right angle ; a complete dark band goes from 



the stigma across the middle of the discoidal cell to the hind border of 



the wing ; abdomen testaceous ; no abbreviated apical ray on wing 



aucta, Bezzi. 

 17(16). Lower angle of the anal cell acute ; no such band going from the stigma 



to the hind border ; abdomen black or only reddish at sides ; there is 



an abbreviated apical ray on wing . . . . . . amoena, Frauenf. 



18(15). There is no streak at all from the stigma ; macrochaetae dark brown or black. 



19(20). There is an abbreviated apical ray on wing, no black spot on the middle 

 of the 5th longitudinal vein ; ovipositor longer than the abdomen 



diversa, Wied. 



20(19). No abbreviated apical ray ; a black spot on the middle of the fifth longi- 

 tudinal vein ; ovipositor shorter than the abdomen. . decora, Loew. 



1. Trypanea augur, Frauenfeld (1856). 



A pretty species, easily recognisable by its characteristic wing pattern and by 

 the want of the apical pair of scutellar bristles. 



In Egypt the present species lives on Zygophyllum album, as observed long ago 

 by Frauenfeld. Becker records the species from Aden ; I have received from 

 Erythraea, Ghinda, June 1916 (Dr. A. Mochi) a male specimen, which agrees very 

 well with Egyptian specimens in my collection received from Becker and Dr. Escher- 

 Kundig ; it has the abdomen broadly reddish on the sides. 



2. Trypanea auguralis, Bezzi, Bull. Soc. Ent. Ital., xxxix (1907), 1908, p. 163. 



Closely allied to the preceding species, and perhaps only a variety of it, distin- 

 guished by having 4 scutellar bristles and a somewhat different wing pattern. 

 Described from Erythraea, Adi Caie, and not found since. 



* [The characters given in the key do not apply to Walker's type, which has a wing 

 pattern very similar to that of T. amoena, Frf., and T. stellata, Fues. The apex of the 

 wing is hyaline. ; there are two spots in the base of the 1st posterior cell ; the ground- 

 colour of the thorax and abdomen is black dorsally, not fulvous ; no oblique stripe from 

 the stigma to the small cross-vein ; and the lower angle of the anal cell is a wide acute 

 angle. — Ed.]. 



