462 MR. B. p. UVAROV ON THE GEOGRAPHICAL DISTRIBUTION 



griseoaptera) and penetrating hence from the mountains of 

 Western Caucasus; one [Platycleis sepium) is a Balkano- Anatolian 

 species coming from the Pontian district ; and three remaining 

 ones [Parameles taurica, Ohjnthoscelis j)ontiGa, and Pezotettix 

 giornai) are of special interest. The first two of them are peculiar 

 to the southern part of the Crimea, and the Pezotettix is a 

 characteristic Mediterranean species, luiknown as yet in the 

 Crimea, though doubtless present there. The presence in the 

 Novorossiisk district of these three species, which are absent from 

 all other districts of the Caucasus, indicates that this district was 

 once in a direct connection with the south of the Crimean 

 peninsula, the time and place of this connection being at present 

 unknown to us. 



As t;) the boundaries of the Novorossiisk district, its inter- 

 mediate position and the transitional chai-acterof its fauna render 

 them very obscure ; I think they are not very markedly defined ; 

 its southern boundar}'- separating it from the Pontian district is 

 to be looked for somewhere between Tuapse and Sotchi. 



9. Tlie Somhheto- Kaklietian district (S.-K.). 



The Orthopteran fauna of this extensive district, though fairly 

 well investigated, is not yet fully known, as is evidenced by the 

 fact of the recent description of some new species and subspecies 

 inhabiting it. The whole number of the known Somkheto- 

 Kakhetian Orthoptera reaches 79 (7 M + 35 A + 24 L + 13 G), 

 which should be less than the real number by some 10-12 forms. 



The first problem to be solved is whether this district belongs 

 to the Steppe or to the Balkano-Anatolian province. Let us 

 consider its afiinities to both of them. 



This district has in common with the Steppe province (districts 

 of Southern Russia and of Kuban-Terek) 69 species, the difterence 

 beino- 21. Temporarily setting aside eight Somkheto-Kakhetian 

 endemics, the remaining 13 are as follows: 



*Empusa pennicornis. *Isopliya pyrerisea. 



*Tettix depressa. * „ amplipeiiiiis. 



*Pavatettix meridionalis. * „ acuminata. 



*Thalpomena ledereri. *Paradrymadusa sordida. 



*Paicilimon distinctus. Nemobius heydeni. 



* „ bosplioricus. Gryllus lateralis. 



*Isopbya adeluiigi. 



No fewer than eleven of these (marked with an asterisk) ai-e 

 Balkano-Anatolian species or belonging to the characteristic 

 Balkano-Anatolian genera, and two Gryllids only are recent in- 

 vaders from the adjacent deserts of the Caspian Ti-anscaucasia. 

 Thus it is evident that the difterence between the Somkheto- 

 Kakhetian and the Steppe fauna is very well expressed and in- 

 dicates the entirely difierent sources of their origin. 



Turning to the relation of the Somkheto-Kakhetian fauna to 

 the Balkano-Anatolian one we see, that only 16 species inhabiting 



