OF OETHOPTERA IN THE CAUCASUS AND WESTERN ASIA. 467 



The typical Eremian forms which do not penetrate into 

 Caspian Transcaucasia from Aderbaidzhan are 19 in number: 



Eremiaphila persica. Helioscirtus nioseri moseri. 

 Oxj'thespis vvagneri. „ ,, ticboniirovi. 



Fisclieria baltica. 6 species of Spliiiigonotus. 



Blepharis mendica. Leptoteruis gracilis. 



Duronia fracta fracta. Derocovys roseipennis lazuvesceus. 



Platypferna tibialis. Scbistocerca peregrina. 



Scintharista bruiiiieri. Spbodi-omei'us sevapis. 



This list includes a rather lai-ge percentage of forms of more 

 southern origin {i. e. Indo - Ethopian), such as Oxyihesjns, 

 Fisclieria, Blej)hcoris, Schistocerea, Sjjhodrovierus, which are to be 

 regarded as recent invaders into the Eremian subregion and do 

 not reacli its northern parts, which accounts for their absence 

 from the Caspian Transcaucasia. Besides, two species are 

 common to the latter district but represented by distinct sub- 

 species {Duronia fracta and Berocorys roselfevnis), and neai'ly 

 all the remaining species are remai-kable foi' their sporadic distri- 

 bution, being bound to certain habitations wliicli are not to be 

 met with in Caspian Transcaucasia; their absence from the latter 

 district is thus easy to understand. 



The remainder is formed of three species : Stenohotlirits 

 ztcboioskyi, Callimenus dilatatus, and Orphaitia scutata zacharovi. 

 The first of them is too little known as regards its geographical 

 distribution, and the two others a.re Balkano- Anatolian species 

 confined to the alpine pastures which are absent from Caspian 

 Transcaucasia. 



The negative features which distinguish the fauna of Caspian 

 Transcaucasia from that of Aderbaidzhan are thus very numerous. 

 Nevertheless, they are but of little zoogeographical value, being due 

 to the comparative youth of the fauna of Caspian Tianscaucasia, 

 it being the cause that "ancient Mediterranean" species (mostly 

 flightless or bad flyers) and the Eremian ones of more southern 

 origin have not had time enough to extend their range of dis- 

 tribution into this district but recently left by the waters of the 

 Caspian Sea, 



Let us see now what is the positive distinction of the fauna of 

 Caspian Transcaucasia from that of Aderbaidzhan. The forms of 

 Caspian Transcaucasia which are not found in Aderbaidzhan are 

 19 in number, as follows : 



Gelastorrhinus sagitta. **Isophya adeluiigi. 



Duronia fracta kalmyka. ** „ scbmidti. 



Stenobothrus petrajus. **Leptopbyes albovittata. 



* „ parallelus. *'''Paradrymadusa sordida. 



*Gompbocerus maculatus. Platj'cleis burri. 



*Arcyptera flavicosta transcaucasica. „ decticiformis. 



*Celes variabilis carbonaria. * „ vittata. 



Derocorys roseipennis roseipennis. * „ grisea. 



**Poecilimon distinctus. **01ynthoscelis indistincta. 

 ** ,, bosphoricus. 



