409 

 ADDITIONS TO YORKSHIRE DIPTERA LIST. 



CHRIS. A. CHEETHAM. 



Since the list of additions published in The Naturalist, 

 1920, pp. 227/234, about 44 other species have been recorded 

 in notices of Union excursions and field notes ; the list of 

 Midge galls, 1921, pp. 337/341, added about 98 more ; and 

 the following list of 165 will give a total of 1064. This is 

 scarcely one -third of the British list, and much work remains 

 to be done before the diptera fauna of the county can be con- 

 sidered as well worked as the coleoptera or lepidoptera. 



The type collection presented to the Union by Mr. P. H. 

 Grimshaw has been of great assistance in the determination 

 of species represented in it, he has also verified many others; 

 Mr. J. E. Collin has kindly assisted in the identification of 

 many Empids and Acalypterates ; and Mr. F. W. Edwards' 

 interest and ever ready help has put the Limnobiid and 

 Mycetophilid groups into a far more satisfactory state. With- 

 out such kindly aids it would be a difficult task, and it is not 

 possible to thank them sufficiently for their help ; their initials 

 are added after those of the collector, where they have verified 

 the species. Collectors' initials will be known from names in 

 the Union's Entomological Committees. 



Where contracted Aus.=Austwick ; Cg.Wd. = Crag Wood. 



Sciara lougiventris Ztt. Farnley, -/7/18, C.A.C., F.W.E., in Brit. Mus. 



Coll. 

 S. rufivcntyis Mcq. Austwick, 17/7/20, C.A.C., F.W.E. 

 Mvcetophila vittipes Ztt. Farnley, 13/10/20, Austwick, 23/2/ig, C.A.C., 



F.W.E. 

 M . marginata Winn. Austwick, 23/2/20, C.A.C., F.W.E. 

 Trichonta hamata Mik. Austwick, 2^/10/20, C.A.C. F".W.E., in Brit. 



Mus. Coll. 

 Exechia guttiventris Mg. Pateley, 7/8/20, C.A.C, F.W.E. ; Austwick 



and Ribblehead, 23/10/20. 

 E. tenuicornis v.d. Wulp. Austwick, 17/10/20, C.A.C, F.W.E. 

 E. trivittata Staeg. Ribblehead and Austwick, 23/10/20 ; C.A.C, F.W.E. 

 Allodia [Mycetophila) longicovnis Wlk. Farnley, 6/5/19, Austwick, 



23/10/20, Great Blake Ghyll, 14/5/21, C.A.C, "F.W.E. 

 Mycetophila (Mvcothera) dimidiata Staeg. Farnley, 13/10/20, C.A.C, 



F.W.E." 

 Allodia candata Winn. [Brachvcampa griseicollis Staeg.). Farnley, 



22/7/20, 13/10/20, C.A.C., F.W.E. 

 Phronia forcipula Winn. Great Blake Ghyll, 14/5/21, C.A.C, F.W.E. 

 Leiomyia {Glaphyroptera) fascipeiinis Mg. Farnley, -/7/18, C .A.C, F.W.E. 

 Boletina trivittata Mg. Gt. Blake Ghyll, 14/5/21, C.A.C, F.W.E. 

 Apoliphthisa suhincana Curt. Crag Wood, 7/5/21, F.W.E. 

 Mycomyia (Sciophila) marginata Mg. Pateley, 8/8/20, C.A.C, F.W.E. 

 Platyura nigriceps Wlk. Cg.Wd., C.A.C, F.W.E., in Brit. Mus. Coll. 

 P./flt-a Winn. (Mcq.). Pateley, C.A.C, F.W.E. 

 P. nemoralis Mq. Austwick, 5/5/20, C.A.C, F.W.E. 

 Ceroplatus lineatus F. Farnley, ii/bjig, C.A.C, F.W.E. 

 Macrocera angulata Mg. Crag Wood, 30/6/20, C.A.C, F.W.E. 

 M. stigma Curt. Pateley, 8/8/21, C.A.C, F.W.E. 



1921 Dec. ] 



2D 2 



