. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT, NAT. HIST., 13: 2001. Figs 6-8. Male genitalia of Orfelia bicolor (Macquart). 6, ventral view of gonocoxites, gonostyli and aedeagus; 7, cerci; 8, tergite 9. Scale line mm. Mycetophilidae Gnoristinae The Boletina sciarina Staeger Group Zaitzev & Polevoi (1995) described four new species of the B. sciarina Staeger group from Russian Karelia and two of these, B. minuta and B. populina, have now been found to occur in Britain. In the case of B. minuta, I had previously confused it with B. moravic
. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT, NAT. HIST., 13: 2001. Figs 6-8. Male genitalia of Orfelia bicolor (Macquart). 6, ventral view of gonocoxites, gonostyli and aedeagus; 7, cerci; 8, tergite 9. Scale line mm. Mycetophilidae Gnoristinae The Boletina sciarina Staeger Group Zaitzev & Polevoi (1995) described four new species of the B. sciarina Staeger group from Russian Karelia and two of these, B. minuta and B. populina, have now been found to occur in Britain. In the case of B. minuta, I had previously confused it with B. moravica Lundstrom which is an uncommon but widespread species in Britain. All of the species from couplet 16 onwards in the key by Hutson et al. (1980) belong to this group, which have the laterotergite ("pleurotergites" in the key) bare, the costa extended well beyond the tip of vein R5, the antennal flagellum all dark and the hind coxa partly or entirely yellow. With these additions, there are eleven British species which are reliably separated only on the structure of the male genitalia; all species are small, wing length less than 4mm, black bodied with mainly yellow legs. Most species of the group, apart from the very common B. gripha Dziedzicki and the frequent B. trispinosa Edwards, have the coxae entirely yellow but these two additions may have the coxae entirely yellow or slightly darkened basally. B. sciarina was the earliest described species of this group (Staeger, 1840), of which B. gripha Dziedzicki is the commonest species and present interpretation follows Dziedzicki (1885), who described several other related species, so it is important to establish its identity. Staeger did not state how many specimens he described it from, but mentioned both sexes and gave a size range and flight period. Edwards (1924) only said of Staeger's types "the series includes some B. sciarina in Dziedzicki's sense and also some B. gripha ; I have examined Staeger's m
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