[New species of Microsporidia--Thelohania jungarica SP. N. (Microsporidia, Nosematidae) from larvae of black flies].

A new species of microsporidians, Thelohania jungarica sp. n., was described from larval populations of Odagmia sp. inhabiting the mountain rivers of the northern spurs of Tien-Shan, south-eastern Kazakhstan. The larval infection rate is 3 to 16%. The pupal infection was reported from single individuals. The species in question differs from other members of the genus in the morphology of spores, ecology and host. Sizes of measured 50 spores varied in the following ranges: live ones--5.1-7.6 x 2.5-3.8, fixed and stained--3.8-6.4 x 1.8-3.8 mkm. The parasite causes pathological and morphological changes in injured tissues.