.1 Monoqrapli o{ Egypiia n Diplera. 53 



t'xtends from the costa to the hase of Ml. In other words the wings 

 are black with four hyaline indentations, three of which are deep 

 at the lower margin and one mueh smaller at the upper margin on 

 the outer side of the stigma, and one complète hyaline l)and after 

 the black base; the hyaline band extends from the costa after the- 

 humeral cross-vein with its outer margin running almost straight 

 and vertically to the lower margin and its inner margin curving in- 

 wardly, almost in a semicircle, towards the base of the wing. thus 

 leaving the lower part of the wing base entirely hyaline; the three 

 deep hyaline indentations at the lower margin are disposed as fol- 

 lows : the f irst in the basai half of the wing, under the stigma, 

 extends from Ml to the lower wing margin where it becomes gra- 

 dually wider ; the second in the apical half of the wing and situated 

 immediately below the short radio-median cross-vein extends also 

 from Ml to the lower wing margin but with its outer margin îvell 

 before the cuvced médian cross-vein; the third indentation in the 

 apical third of the wing extends from R4 + 5, crossing R5 and 2nd 

 .M2 cells to the lower margin; its inner margin follows the same 

 curve as that of the médian cross-vein and its distance to this cross- 

 vein is equal to the distance between the outer margin of the second 

 deep indentation and the médian cross-vein ; its outer margin slants 

 much outwardly, especially below Ml so that the indentation is much 

 wider and more inflated below than above. The small, rather square- 

 shaped indentation at the upper margin is situated at the middle 

 of the wing and extends from the costa to about half way lietween 

 R2 + 3 and R4 + 5, its inner top corner touching the tip of RI. 



This and .S'. apgijptUicn are l)oth very common in ail th.^ 

 wadis around Helwan and prol)ably wherever the food plant, 

 Stachys aegypttaca. of one of the two species grows. Unfortunately 

 T am not in a position to say which of the two species breed in that 

 ))lant, but I hâve collected both species from the StacJvi/s, therefore 

 in ail probability it is the food plant of both species. My dates for 

 the above species extend from March to May and I hâve also cap- 

 tured it in October and early November in the Wadi Hoff. 



I hâve recently bred a large séries of S. dehskii from the in- 

 florescence of Stfichi/s aeqyptiaca collected in the Wadi Hoff (10. IV 

 to 28.V.1924). 



SPHENISCOMYIA AEGYPTIACA Effl.^t. 

 (PI. ITI fig. 2) 



Effl.^t., Bull. Soc. Roy. Entom. d'Egypte, 137. (11)23) 

 DIAGNOSIS: — A small black species, easily distinguished 



