BR, J. ENT. NAT. HIST., 13: 2001 229 



Legs yellow, trochanters dark, tarsi more brownish. Hind femur dark on apical 

 sixth. Femora with yellow hairs, tibiae with brown setulae. scattered darker setae arc- 

 shorter than tibial width. Tibia I with 4 posteroventral setae on apical half: tibia 2 

 with 5 anterodorsal, 1 posterodorsal at apical third, 2 posterior setae near tip. 3 short 

 posteroventrals on apical half; tibia 3 with 4 6 anterior. 4 anterodorsal and 4-6 

 dorsal setae. 



Wing colourless with veins yellow; a uniform covering of microtrichia and 

 macrotrichia over most of surface. Vein sc-r at junction with Rs. R A close to Rs 

 forming small radial cell shorter than broad. Stem of median fork a little shorter than 

 crossvein r-m. Posterior fork begins opposite level of tip of Sc. Fork veins reach 

 margin. Costa exceeds tip of R 5 by nearly a third distance to M,. Haltere clear yellow. 



Abdomen shining black with yellow setae. Genitalia (Figs 30-31) dark brown. 

 Tergite 9 (in situ in Fig. 30) is short elongate, with a blunt apex bearing a small 

 median protuberance. Gonostylus (Fig. 31) with rounded apical and short tapered 

 ventral lobe, bearing long marginal setae, medially with internal lobes bearing a 

 group of long apical flattened macrochaetae. 



Wing length 2.7 (holotype) —2.9 mm (paratype). 



Female. Not recognised. 



Holotype male, Channel Islands, JERSEY, Heatherview, St. Ouen. 15.viii.1991. 

 A. Warne, deposited in NMS. 



Paratype male, ENGLAND, Northants, Buckingham Thick Copse, trap A2. 

 9.vi.l992, A. Warne, in author's collection. 



Etymology. The specific name refers to the Roman name of the island of Jersey, 

 from which the modern name is derived, and is a noun in apposition. 



Discussion. Although the two specimens were from the same collector, they were 

 included in samples in accord with other material from the two areas so there is little 

 likelihood of either being mislabelled. 



S. caesarea runs to S. nonnisilva Hutson in the key by Hutson et al. (1980) except in 

 the body not being all black. In the Holarctic fauna, its genital structure most closely 

 resembles that of the Nearctic S. laffooni Zaitzev (Zaitzev, 1982a). especially in the 

 form of the gonostylus; the gonocoxites are also similar and tergite 9 is short and 

 tapered apically but broader. 



Sciophila thoracica Staeger 



Sciophila thoracica Staeger, 1840 

 Sciophila quadriterga Hutson, 1979, syn. n. 



S. thoracica Staeger (1840) was not identified in the revision of the genus h\ 

 Zaitzev (1982a), who was unable to see the type material although he noted that a 

 Russian specimen determined as thoracica by Stackelberg was quadriterga Hutson. 

 Edwards (1924) studied Staeger's types and mentioned that thoracica had a 

 distinctive structure to the male genitalia. During a recent visit to Copenhagen 

 (ZMUC), I found these syntypes (two males and a female) to be as described by 

 Edwards. Both males were S 1 . quadriterga: one of them, of which the genitalia had 

 been mounted on a microscope slide, had been labelled as Lectotype by Pakarinen but 

 this has not been published. I have labelled the same specimen as lectotype, which is 

 established here. The second male was that referred to as var. b (with thoracic stripes 

 present) by Staeger. 



Mycetophilinae 



Here British distribution is summarised except for new or scarce species. 



