BR, l INI NA I HIST., 13: 2001 



"Ordr, [ Ordrup, near Copenhagen] St." and one female is labelled "St."; other 

 specimens are unlabelled but all presumably Danish. The males include 6 B. gripha 

 (including the labelled specimen), I li. lundstroemi Landrock. I B, />t>/>ulina. 3 with 

 abdomens partly missing so undeterminable and I B. sciarina sensu D/icd/icki. I 

 have labelled the last specimen as lectotype to maintain established usage. 



Boletina minuta Polevoi in Zaitzev & Polevoi (Figs 9-12) 



B. minuta is most readily recognised by the structure of the distal margin of the 

 gonocoxites, which bear a long curved medial process with a simple rounded lobe 

 and a shorter setose lobe lateral to it. It also differs from B. sciarina in the short blunt 

 ended parameres (Figs 10-11). 



The types were collected in a birch (Be tula) and aspen (Papains) stand. The British 

 material is from diverse deciduous woodland sites. I also have a male collected in 

 conifer forest in Poland, Cisna, 20. ix. 1991 (A.E. Stubbs). Wing length of material 

 examined 3.2-3.5 mm. 



British material of B. minuta 



ENGLAND: Berks, Newbury, Greenham Common, 20.iv.1974. 1 male (D.M. 

 Ackland, in author's collection); Berks, Windsor Forest, lO.v.1978. 1 male 

 (Chandler). SCOTLAND: Aberdeenshire, Morrone Birkwood. 31. v. 1998. 4 males 

 (Chandler and I. Perry). 



Boletina populina Polevoi in Zaitzev & Polevoi (Figs 13-14) 



This species, reported as British by Chandler (1998a), most closely resembles 

 B. sciarina, agreeing with it in the form of the gonostylus, the pointed triangular 

 medial process of the gonocoxites and narrow pointed parameres (Fig. 13). It differs 

 in the parameres being shorter and strongly curved apically and in the more 

 numerous rows of small spines on the cerci (Fig. 14). Wing length of material 

 examined 3.2 mm. 



The holotype was from an aspen (Populus tremula) stand; the Perthshire site is a 

 gorge with mixed deciduous woodland, while the Aberdeenshire site is open birch 

 (Betula) and juniper (Juniperus) woodland, rich in bryophytes, and the visit on which 

 it and B. minuta were found was notable for producing 10 species of Boletina 

 including six members of the sciarina group. 



British material of B. populina 



SCOTLAND: Perthshire, Pass of Killiecrankie, 25.vi.1997. 1 male (I. Pern): 



Aberdeenshire, Morrone Birkwood, 3 1. v. 1998, 3 males (Chandler and Perry). 



Leiinae 



Genus Clastobasis Skuse 



This is a genus new to the British Isles, which runs in the keys by Hutson et al. 

 (1980) to Leia Meigen and most species of both genera are mainly yellow in colour. It 

 agrees with most of the characters listed for Leia, except for vein sc-r (Sc : in the key) 

 being absent and the wings being clear yellowish without any marking: at least a 

 subapical wing band is usually present in British species of Leia. It also differs in the 



