The distribution of M. umbrosus extends from Africa to the Russian Far East and East Asia (Japan, China), and Australia and Thailand (with new distributions reported here). Although no African type material is examined here, the morphological features of those populations are consistent with Freeman's concept.

The Japanese species of the genus Paramerina Fittkau, 1962 are reviewed based on studies of the type material and the specimens collected recently. Three species, P. kurobekogata Sasa et Okazawa, P. tokararesea Sasa et Suzuki and Krenopelopia amaminova Sasa, are treated as synonyms, and four species, P. yunouresia (Sasa), P. okigenga (Sasa), P. okimaculata Sasa and P. togavicea (Sasa et Okazawa), are recognized as valid. The adults, males and females, of the first two and the last species, and the pupa of the last species are redescribed. The pupae and larvae of the first two species, and the larva of the last species are described for the first time in this paper. Based on the examination of the holotype, the morphological features of P. okimaculata are discussed. The generic diagnosis for the larva is emended. A key to males of the known Japanese species is provided.

Zlivrelimyia kuroberobusta Sasa and Okazawa, 1992 is transferred to the genus AlotanJLpus Roback, 1971 on the basis of the adult morphology. The adult male is redescribed, while the adult female and the immature forms, pupa and larva, are described for the first time. At present this is the only species ofAlotattypus known ft'om the Palaearctic Region.

Two new species of Polypedilum, collected from fontal streams in Japan, are described and illustrated on the basis of the adult male and female and pupal exuvium of each.

Larsia mlyagasensis sp. nov. is described on the basis of the male and female adults, pupa, and larva. This is the first report of the genus Larsia ftrom Japan.