
            -9-

In some areas, where there was mass breeding of the 
C. riethi, the water was salty and marshy with sparsely
growing grass as vegetation, and only in deeper hollows and
in moister areas, reed and reed mace growing. The soil of 
these swamps was silty-sand, in some places clogged up with 
decaying remnants of vegetation; these marshes have a direct 
outlet into the sea. Here, besides the C. riethi, a common 
find were C. salinarius, C. manchuriensis and C. maritimus
species, and, rarely, C. puncticollis.

<u>CONCLUSIONS</u>

1.	 In the Donetzk region for the first time we studied
breeding areas and found 18 species of midges of the Culicoides 
genus: (C. nubeculosus, C. riethi, C. puncticollis,
C. salinarius, C. circumscriptus, C. manchuriensis, C. 
homochrous , C. fascipennis, C. subfascipennis, C. ustinovi, 
C. maritimus, C. simulator, C. atazanicus, C. odibilis,
C. vexans, C. albicans, C. reconditus and C. punctatus.

The breeding areas of the blood sucking midges within
the limits of the Donetzk region in particular and in the
steppe zone in general are localized and focal. The main
focal points for the mass breeding of midges are rivers
having a complex of marshy water bodies, water reservoirs in
river valleys, interfluvial basins and shores of the Azov
sea.

2. The larvae of the C. nubeculosus , C. riethi, C.
puncticollis, C. Salinarius, C. manchuriensis and C. circumscriptus 
develop in all kinds of biotops. The larvae
C. nubeculosus, C. riethi, C. puncticollis are found, en
masse in silty shallow water basins, void of vegetation,
well heated by the sun (or along the shores of large water
basins provided the conditions are similar to those
described).

The larvae G. fascipennis, C. subfascipennis, C. maritimus, 
C. simulator, C. odibilis, C. albicans, C. reconditus
and C. punctatus develop in biotops overgrown with grass and
sedge vegetation; the C. vexans larvae are found in temporary
Water holes that dry up at the beginning of summer and that
have grass vegetation.
        