Grimshaw: Nottinghamshire Diptera. 103 
Pipiza noctiluca L. One of the females and two of the 
males have the wings quite clear, and only one of the 
males has any yellow spots on the abdomen. Nevertheless, 
I am convinced that all the specimens are of one species, as 
I cannot detect any other difference. 
Chrysogaster hirtella Lw. Ina note I have from Mr. Verrall 
he states that this species is the one long known to the 
British collector as C. macquarti Lw. 
Melanostoma mellinum L. Amongst the specimens I have 
attributed to this species are some that seem to fit the 
description of M. scalare Fab., but the differences are so 
slight (colour of legs, etc.) that I do not regard them as 
distinct. 
Syrphus ribesii L. I have included under this name several 
specimens which might pass as S. vitrifennts Mg. After 
examining a large number of specimens of both forms I feel 
convinced that there is no specific difference between them. 
In the females the colour of the hind femora is usually 
regarded as a distinctive character, but as this seems to be 
the only difference, surely it is folly to separate them! 
According to Verrall the males are ‘practically identical, 
but for a character at present unpublished and microscopical.’ 
If they ave distinct I leave it to this authority to make the 
matter clear. 
Chrysochlamys nigrifrons Egger. Probably only a form of 
C. cuprea Scop. 
Olivieria rufomaculata DeG. This is the species usually called 
O. lateralis Fab. 
Phorocera incerta Meade. This is a new species, described 
by Meade in the Ent. Mo. Mag., 1897, p. 223. Its generic 
position seems to be doubtful, as pointed out by Austen in 
the Ent. Mo. Mag. for February of the present year. One 
of the specimens obtained by Mr. Thornley was seen and 
described by Mr. Meade, and is hence one of the types. 
Through the kindness of Mr. Thornley it is now the property 
of the Edinburgh Museum. 
Calliphora azurea Fin. Mr. Thornley’s specimen is the true 
asurea, and quite distinct from grenlandica Ztt.’ 
Pelethophila flava L. This species is given in Part III. of 
Verrall’s List, and hence required confirmation as a British 
insect. 
April 1508. 
