Description of the larvae of Cricotopus festivellus (Kieffer 1906) and Cricotopus diversus (Boesel 1983) with keys to discrimination of larval, pupal and adult stages (Diptera: Chironomidae)

4-16

Oropuella, a new genus of Orthocladiinae from the western Nearctic

17-30

Description of the adult and immature stages of Clunio ponticus Michailova, 1980 (Diptera, Chironomidae), from the Black Sea, Varna, Bulgaria

31-47

Description of the pupa of Tanytarsus alatus Paggi (1992) (Chironominae: Tanytarsini)

First record of Nubensia nubens (Edwards, 1929) (Diptera: Chironomidae) for Bulgaria