NOTES ON THE DIPTERA OF DERBYSHIRE. 5 



Corixa selecta, Fieb. — This is to be found fairly freely in some 



of the brackish pools round the Teesmouth on the Durham side, 



the only insect accompanying it being the very common Gerris 



thoracicus. 



Zoological Laboratory, 



Armstrong College, 



Newcastle-on-Tyne. 



NOTES ON THE DIPTERA OF DERBYSHIRE (II).* 

 By Eric Drabble, D.Sc, F.L.S., and Hilda Drabble. 



The only attempt at a list of Derbyshire Diptera with which 

 ■we are acquainted is that in the ' Victoria County History,' 

 voL i, 1905. In that list nearly all the localities are in South 

 Derbyshire ; the north of the county thus appears to have 

 been practically unworked. In the ' Entomologist,' vol. xlix, 

 December, 1916, pp. 273-275, we published a list of Syrphids 

 containing twenty-five species not previously recorded for Derby- 

 shire, and adding records for many more in the north-east of the 

 county. 



During 1916 and 1917 much attention was paid by us to the 

 Diptera, with the result that 104 species hitherto unrecorded for 

 Derbyshire were captured, and many others previously deter- 

 mined from the south of the county only were found in the 

 north and north-east. 



We have pleasure in acknowledging our indebtedness to the 

 authorities at the British Museum (South Kensington) for per- 

 mission to consult the collections at that institution, and to 

 Dr. Gahan for his kind help with the literature. 



BlBIONID^. 



Dilo'phus fehrilh, L. Barlow. 



D.fhnoratus, Mg. Barlow. 



Bibio pomome, F. Cordwell. 



B. varipes, Mg. Cathole. 



B. johanuiSfh. Loads, Cathole, Spital. 



CUlRONOMIDiE. 



Tanypus melanops, Mg. Spital. 



LlMNOBID^. 



Dicranomyia liitea, Mg. Barlow. 

 Rhypholophiis lueinorrhoidalis, Ztt. Moorhall. 

 Erioptera fiavescens, Mg. Sutton. 



* I, ' Entomologist,' xlix, pp. 273-275. 



