1894.] 77 



As Diptera are now often sent to me for determination which I 

 have long well known to be British, but which are not recorded in my 

 " List," I think I may as well clear ofE some about which there can be 

 no reasonable doubt. Of course some may have been included in my 

 " List " under names not yet recognised by me. I have purposely 

 avoided describing any new species in this paper, as I think such 

 species may be dealt with better in a different manner. 



1. Cordyla semijiava, Staeg. : I am not yet at all satisfied with the 

 species of the genus Cordyla, but I consider a specimen caught at 

 Lodore on June 21st, 1889, and one at Dolgelley on June 13th, 1887, 

 to be clearly this species. G. flaviceps, Stseg., may also be confirmed 

 as a British species from Tuddenham on September 16th, 1891. 



2. Dynatosoma nigricoxa, Ztt. : this well marked species occurred 

 at Lodore on June 21st, 1889 (1 (^, 1 ? ), and Mr. (1. C. Bignell gave 

 me a female caught at Cornwood on October 29th, 1890, 



3. Mycetophila vittipes, Ztt. : out of the numerous species in this 

 genus not yet recorded as British, I select three which seem to be 

 beyond doubt. M. vittipes has occurred at Lodore on June 21st, 1889, 

 Colwich on June 8th and 15th, 1889, and at Three Bridges, Sussex, on 

 August Ist, 1889. M. lineola, Mg., may be confirmed as a somewhat 

 common species, occurring from Lewes to Rydal. 



4. M. luctuosa, Mg. : caught in my garden on January 29th, 1887 

 (1 ? ), and on September 18th, 1888 (1(?). 



5. Jif. oiscura, Dzied. : out of the numerous species so minutely 

 and carefully worked out by Dziedzicki, 1 consider this one undoubtedly 

 occurred at Tuddenham near here on September 16th, 1891. 



6. JRhymosia cristata, Stseg. : this strongly marked species occurred 

 at Inveran on July 14th and 15th, 1886. Allodia ornaticollis, Mg., 

 and A. crassicornis, Stan., may be confirmed as common British 

 species. 



7. BracTiycampta alternans, Winn. : when I published my "List" 

 I knew the genus occurred in Britain, and consequently I included it 

 with a doubtful species ; the species (£. bicolor, Mcq.) may now be 

 confirmed as occurring in my garden, and also at Llangollen, and in 

 addition to it about half a dozen more species occur in Britain. To 

 distinguish these a most minute examination of the male appendages 

 is necessary, but the distinctions are most pronounced and conclusive. 

 £. alternans has occasionally occurred in my garden in June and 

 November. 



