I04 



ADDITIONS TO THE LIST OF YORKSHIRE 

 DIPTERA. 



JOHN. H. ASHWORTH, 

 Ilkley. 



In looking over lists of Diptera sent with specimens for 

 verification during the last three years (1905-6-7) to the Rev. 

 W. J. Wingate, to whom thanks are due for so kindly examining 

 the specimens, it would appear that a considerable number 

 of species occur and have recently been found in Yorkshire, 

 which are not mentioned in the list prepared by Mr. Percy H. 

 Grimshaw, in the Victoria History of the County of York. It 

 may be advisable, therefore, to treat Mr. Grimshaw's list as a 

 basis for the list of Diptera found in Yorkshire, supplementing 

 it by the publication at intervals of lists of additional species. 



In the following list where no name of person appears 

 against place and date, the insect was taken by myself. 



Fam. BiBioNiD^. 



Bibio johannis L. Ilkley, 5th May 

 '07. 



nigriventvis Hal. Clapham, 

 30th May, '05 ; Ilkley, 5th 

 June, '07. 



Fam. Chironomid.1;. 



Chironomus annularis Deg. Stan- 

 ningley, 3rd July, 

 '05- 



pedellus Deg. Harro- 

 gate, ist June, '06. 

 rufipes L. Calverley, 



2nd Sept., '05. 

 tentans F. Castley3rd 

 May, '06. 

 Cricotopus hicinctus Mg. Calverley, 



28tli April, '05. 

 Tanytarsus pusio Mg. Ilkley, 5th 



Feb., '06. 

 Eurycnemus elegans Mg. Pool, 



17th August, '06. 

 Diamesa ammon Hal. Ilkley, 27th 



June, '06. 

 T any pus nebulosus Mg. Pudsey, 

 5th May, '05. 



Fam. Cjlicid.^:. 



Culex annulatus Schrk. Otley, 7th 

 November, '06. 



Fam. Ptychopterid^. 

 Ptychoptera paludosa Mg. Ilkley, 

 to Addingham, 26th June, '07. 



Fam. LiMNOBiD^. 



Dicvanomyia chorea Mg, Thackley, 

 nth May, '05. Prevalent in 

 swarms about Ilkley during 

 Autumn. 



Rhiphidia macidata Mg. Austwick, 

 26th May, '05 ; Calverley, 23rd 

 j August, '05 ; Otley, September 

 [ and October, '06. 

 Rhypholophus nodulosus Mcq. Ilk- 

 ley, 2oth June, '06 ; Woodhall 

 (Calverley), 9th June, '05 ; about 

 Esholt, 27th August, '06. 

 Limnophila dispav Mg. Killinghall 

 (near Harrogate), ist June, '06. 

 Trichoceva hiemalis Deg. Common 

 throughout the win- 

 ter. 



,, regelationis L. Common 

 throughout the win- 

 ter. 



Amalopis littoralis Mg. Ilkley, July, 

 '06. 



Fam. TiPULiD^. 



Dolichopeza sylvicola Curt. Ilkley, 

 2 ist July, '07. 



Pachyrrhina guestfalica Westh. Ilk- 

 lev, i^th Julv, '06. (Thacklev, 

 8th July, '05)'? 



Naturalist, 



