240 BR. J. ENT. NAT. HIST., 13: 2001 



laterals only behind humeral area. Scutellum apically, laterotergite and mediotergite 

 brownish. All setae brown. 



Legs yellow, with apical quarter to third of hind femur and tip of hind tibia brown. 

 Tibia 2 with 3-4 anterodorsal, 3-A posterodorsal and 7 posterior setae. Tibia 3 with 9 

 anterodorsal, 13-16 posterodorsal and 6 posterior (on apical two fifths) setae. 



Wing yellowish with brown costa and radial veins. Stem of median fork up to 

 twice as long as r-m. 



Abdomen with tergites 1-3 mainly yellow, 2-3 dark brown dorsally, tergite 4 with 

 yellow lateral triangle basally, rest and tergites 5-6 dark brown. Genitalia (Figs 45- 

 47) yellow. Cercus (Fig. 46) elongate, extending a little beyond tip of gonostylus in 

 situ. Gonostylus with lateral portion comprising a curved strap-like ventral lobe and 

 a narrow dorsal lobe (Figs 45, 47). 



Wing length 2. 7-3. 2mm. 



Female. Unknown. 



Holotype male, SCOTLAND, Perthshire, Bridge of Balgie, 10.vii.1988, oak 

 (Quercus) and beech (Fagus) woodland (Chandler, deposited in NMS). 



Paratypes: SCOTLAND: 2 males, Ross, Easter Fearn, birch (Betula) woods, 

 ll.vi.1984; 1 male, Ross, Beinn Eighe NNR, 10.vi.1984; 1 male, Sutherland, Migdale 

 Wood, 28.V.1994; 1 male, Sutherland, Torboll Wood, 26.vi.1999 (Chandler); 1 male, 

 Argyll, Ariundle, 10.vi.1982 (A.E. Stubbs). 



Etymology. Named for Carl Lundstrom who first recognised this species. 



Discussion. I added P. longelamellata Strobl to the British list (Chandler, 1992b), 

 but this was based on the figures by Lundstrom (1906) of a Finnish male. Kallweit 

 (1998) has studied Strobl's types and found that longelamellata is a senior synonym 

 of P. minuta Landrock. Lundstrom (1906) identified as longelamellata a species with 

 long cerci (his "upper lamellae"), which he thought agreed with Strobl's description, 

 but in minuta it is the gonostyli which are elongate. Lundstrom did not describe his 

 species further and it is here described as new. 



Acknowledgements 



I am indebted to all the collectors cited above for enabling me to study and report 

 on their finds. I also thank the authorities of the museums which have permitted 

 loans of relevant material. 



The material reported from Burnham Beeches was obtained in a survey carried out 

 by John Ismay, while that from Epping Forest was collected during a survey of the 

 Diptera of the Forest. Both surveys were on behalf of and funded by the Corporation 

 of London. Records from the Ashridge Estate were obtained during a survey on 

 behalf of and funded by the National Trust. Material from the garden at 

 Buckingham Palace was collected as part of an in-depth survey into the flora and 

 fauna there, with gracious permission of Her Majesty The Queen, by the London 

 Natural History Society and the Natural History Museum. Colin Plant sorted the 

 Malaise trap material, from which the records cited here originate. 



I also thank Alexander Zaitzev, Alexei Polevoi and Jan Sevcik for information on 

 particular species and for useful discussion during the preparation of this paper. 



References 



Caspers, N. 1980. Drei neue Mycetophiliden aus der deutschen Mitteleebirgsregion. Spixiana 3: 

 141-143. 



