1S69. 



191 



said to occur in Europe, Asia, Africa, and America. There are about 

 a dozen European species, of which only three, grossularice, ribesii, and 

 vitripennis, are recorded as British in Walker's Diptera Britannica ; 

 Stephens and Curtis, in their catalogues, mention a fourth, nitidicollis, 

 which 1 reinstated in the June number of this Magazine for last year, 

 and I have now to add a fifth in latifasciatics, and perhaps a sixth in 

 nitens. Most, if not all, of the rest may be expected to occur in the 

 British Isles. The European species are — 



1. Lineola, Zetterstedt, Dipt. Skan., ii, 714,16(1843). 



2. Vittiger, Zetterstedt, loc. cit., 714, 17 (1843). 



These two may be distinguished from all the rest by their black 

 epistomal middle line ; lineola has a darker stigma and duller thorax 

 than vittiger. Zetterstedt and Schiner record lineola as widely dis- 

 tributed in Skandinavia, and rare in Austria, while vittiger is the 

 rarer in Skandinavia, and the commoner in Austria. 



3. O-rossularice, Meigen, Sys. Bes., iii, 306, 48 (1822). This may be 



known by its entirely black antennae, dull coloured thorax, wholly 

 yellow epistoma, and completely entire abdominal bands, without 

 the trace of a notch. The base of the femora and the coxse being 

 black, distinguish it from its nearest ally diaphanus. It is found 

 uncommonly over nearly all Europe. Walker records it as British, 

 but only says "Eare; in Mr. Saunders' collection (E. S. I.)." 

 I have seen one female specimen, probably from Sussex, but the 

 usual British representatives are only large ribesii. 



4. Diaphanus, Zetterstedt, Dipt. Skan., ii, 711, 12 (1843). Distinguished 



from the preceding by its smaller size, yellow front, and entirely 

 yellow legs in the female, and with only the coxse dark in the male. 

 It is found rarely in Sweden and Austria, and probably over all 

 central Europe, though generally in single specimens. 



5. Bihesii, Linne, Fauna Suecica, 1816 (1761). This is probably the 



commonest species of the genus throughout Europe ; it may be 

 known by its entirely yellow epistoma, dull thorax, antennae with 

 the third joint pa'e beneath, scutellum clothed with mostly dark 

 hairs, and slightly emarginate abdominal bands. There may be 

 two species still under this, as specimens collected in large woods 

 may nearly always be distinguished at a glance from those collected 

 in gardens, by their darker and more compact appearance. Com- 

 mon throughout England. 



6. Vitripennis, Meigen, Sys. Bes., iii, 308* 50 (1822). I must say, 1 



