developed genitalia (Figure 208). Martynov (1934:46—49) considers 



Rh. cupressorum to be closely related to Rh. simulatrix McL., which 



was placed by Dohler (1950:290) in the subgenus Rhyacophila s. str. 



Mode of life and habitats. Shallow mountain rivulets with a 

 stony bottom. 



Distribution. Caucasus, including the main range and Transcaucasia. 



4. Rhyacophila nubila Zetterstedt 



Klapalek, 1888:57-59, Figure 20. - Struck, 1903:79, Plate IV, Figure 5. 

 Ulmer, 1903:127; 1909:219, Figure 344, a.- Siltala, 1905:141-146.- 

 Lestage, 1921:415-418. - Lepneva, 1940:200. 



222 



FIGURES 209 and 210. Rhyacophila nubila Zett.: 



209 — general view of larva; 210 — head, dorsal (A) and ventral (B). 



231 



