Mesopotamia and N.W. Persia. 591 



a un aspect qu^on ne retrouve cliez aucun autre Euchloe ; 

 ce trait a la raeme araplexir sur les deux surfaces." 



This description fits exactly the specimens collected hy 

 Col. Peile, but its application by Verity to the specimens 

 from Scliahrud in the B.M.^ which he figures at plate &7, 

 figs. 31 & 32, seems, in view of this additional material^ 

 no longer justifiable. The two features on which he lays 

 stress are the sharp definition of the inner edge of the apical 

 patch and the reduction of the size of the discoidal spot. 

 In the Schahrud specimens the former is very broad and 

 diff'use, the latter large and almost quadrate^ in both sexes. 

 This race from N.E, Persia may well be called vbrityi, sp. n.. 

 the types being the ^ and ? in the B.M. figured by Verity, 

 and persica, Ver., be restricted to the race from Western 

 Persia, Kurdistan, &c. 



B.M. types No. Rh. 161, S , 12. 5. 78 ; 162, ? , 15. 5. 71, 

 Christoph. ex CoU. Elwes, Shahrud, N.E. Persia. 



2. Zegris eupheme dyala, Peile. 

 Entomologist, liv. p. 151 (1921). 



26 cT, 26 ? , Kizil-Robat, L. bank of R. Dyala, 10. iii.- 

 6. iv. 1919. 



Resembles the f. tschudica in the whiteness of the apical 

 area of the underside of the forewing, but can at once be 

 separated from it by the far greater reduction in the extent 

 of the green mottling of the underside of the hindwing. 

 The orange patch is usually much smaller, and the grey 

 apex very much blacker, than in f. menestho. 



There are three pairs of typical tschudica in the B.M. 

 from S. Russia, and all of them agree far better with 

 Herrich-Schaf(:er's figure of tschudica than do these speci- 

 mens from the R. Dyala. I suspect that the male mentioned 

 by Le Cerf (Ann. d'Hist. Nat. ii. (2) p. 29, 1913), taken 

 at Danah-Kouh in March 1903, is referable to this race 

 rather than to true tschudica. 



B.M. types No. Rh. 163, S , 23. 3. 19 ; 164, ? , 15. 3. 19, 

 Kizil-Robat. 



2 a. Zegris evpheme tigris, subsp. n. 



13 c?, 4 ? , Fathah, R. bank R. Tigris, 18. iii.-5. iv. 20. 



This race, like the preceding, comes very close to 

 tschudica, H.-S. It can, however, be separated at once 

 from that form by the yellowness of the apical area of the 

 underside of the forewing, this area being, in Herrich- 

 Schiiffer's figures (Schmett. Eur. fF. 449-353), white, with 



