1905. J 81 



LIST OF BRITISH DOLICHOPODIDM, WITH TABLES AND NOTES 

 BY G. H. VEEB.ALL, F.E.S. 

 {Continued from page 57). 

 14. MELANOSTOLUS Kow. 

 M. melanchoUcus Lw. : I caught one male and two females at 

 Woking on August 1st, 1875, which I described in this Magazine in 

 1876 as Diaphorus dorsalis n. sp. ; I had not overlooked Loew's de- 

 scription ot 1869, but I had failed to identify it. It was not until 

 1884! that Jvowarz founded the genus Melanostolus for it. 



15. DIAPEORUS Meig. 



1 (4) Base of abdomen translucent yellow. 



2 (3) Hind femora mainly brownish-black ; the yellow on the abdomen occupying 



at least all second segment 1. oculatus Fall. 



3 (2) Hind femora black on only about apical half 2. Hoffmanseggil Meig. 



4 (1) Base of abdomen concolorous with the rest. 



5 (6) Blackish; halteres black 3. nigricans Meig. 



6 (5) Metallic-green ; halteres yellow 4. Winthemi Meig. 



Several more species allied to D. Winthemi may occur in Britain. 



1. D. oculatus Fall. : not very uncommon in Hampshire, Sussex 



(several localities), Kent, Suffolk, Pembroke, and Cumber- 

 land (Coniston). 



2. D. Hojfmanseggii Meig. : 1 leave this name in our list for a speci- 



men taken by me at Lyndhurst, and one taken in the New 

 Forest by Dr. Sharp, though they would answer more cor- 

 rectly to D. tri2yilus Lw. I am, however, impressed by some 

 specimens in Kowarz's collection which are labelled D. 

 cyanocephalus Mg. =^ Hoffmanseggii Mg. = tripilus Lw. 

 Kowarz had a good collection of the European species of 

 Diaphorus, and undoubtedly he had arrived at this synonymy, 

 and to confirm part of it 1 must say that every male I have 

 seen called D. Hoffmanseggii would answer to the description 

 of D. tripilus; D. cyanocephalus has remained an unrecognised 

 species since its first description in 1824, but would well 

 answer to this species, except that Meigen must have over- 

 looked the pale base of the abdomen if his specimen was a 

 male. 



3. D. nigricans Meig. : 1 have taken a few specimens of this species 



in the New Forest, and I have seen two in the late Dr. P. B. 

 Mason's collection. I have several females from Three 



