Five species of black fungus gnats Corynoptera furcifera Mohrig & Mamaev, 1987, Cratyna (Cratyna) fulvicauda (Felt, 1898), Lycoriella lundstromi (Frey, 1948), Pseudolycoriella paludum 1948) and Xylosciara (Xylosciara) heptacantha Tuomikoski, 1957 are recorded from Ukraine for the first time. Distributions these summarized diagnoses provided.

The genus Prosciara from China is reviewed and 36 species are recognized. Among them, 16 new species, P. oligotricha sp. nov., P. gyracantha sp. nov., P. hemicrypta sp. nov., P. angusta sp. nov., P. euryacantha sp. nov., P. ellipsoidea sp. nov., P. paucispina sp. nov., P. myriacantha sp. nov., P. columellata sp. nov., P. fossulata sp. nov., P. ternidigitata sp. nov., P. globoidea sp. nov., P. l...

Additional experiments with homologous as well as heterologous hybridization confirmed our previous finding in Sciara coprophila that XX females have nearly twice the number of ribosomal RNA cistrons as XO males. A comparison between two different X' chromosomes revealed that only the one carrying the irradiation-induced Wavy mutation has a deletion of 70% of its ribosomal RNA cistrons as compa...

T h e term genomic imprinting has been used to refer to all cases where genes have differential expression depending on the sex of the parent from which they are inherited~-3. At least two distinct phenomena have been described as imprinting and it is important to distinguish between them. In fungus gnats (Sciaridae), gall midges (Cecidomyidae) and scale insects (Coccoidea), the paternal set of...