Yorkshire Naturalists' Union : Annual Report, 1916. 41 



mollusca imported into the county along with grain. Many 

 arrive in a living state and they have been noticed in an active 

 condition on the refuse heaps where the ' screenings ' of the 

 grain have been deposited, and no doubt remain alive for some 

 weeks. 



Most of the field meetings have been attended by our Presi- 

 dent, and other members of the section. The number of species 

 recorded at the various meetings is as follows : — Malton, 36 ; 

 Bolton Woods, 27 ; Coverdale, 21 and Wentbridge, 16. 



East Riding. — Mr. J. F. Musham writes :— At Selby 

 H. arbustorum seems to be on the decrease. It is also in- 

 teresting to report that the little colony of Hyalinia lucida. 

 discovered at Selby in 1911 is still existing ; an isolated rind 

 like this suggests accidental importation. 



ENTOMOLOGICAL SECTION. 



Lepidoptera.— Mr. B. Moriey writes : — Military restrictions 

 have prevented coast and night collecting. Owing to the 

 cold, wet weather, which prevailed practically the whole of 

 the season to July, very few insects were seen. Since July 

 noctuse have been common. 



Eupithecia plumbeolata has been added to the Skelman- 

 thorpe district list by the capture of two specimens in May, 

 and careful search amongst poplar in June for larvae of Tethea 

 subtusa resulted in an abundance being found in the same 

 district. The species was first recorded two years ago, buc 

 evidently it has long been established in the neighbourhood. 

 Black specimens of Ematurga atomaria were taken in June on 

 the Moors to the south of Holmfirth. This form has now been 

 taken on all the moors in the South West Riding, and is evidently 

 becoming more common. 



Coleoptera. — Mr. W. J. Fordham writes : — It is impossible 

 at this early date to give a list of beetles obtained during the 

 year by the members of the Committee. Several interesting 

 species have been added to the Yorkshire list. A full and 

 detailed account will appear later in The Naturalist. 



Hymexoptera, Diptera, axd Hemiptera. — Mr. Rosse 

 Butterfield writes : — The most interesting addition to the 

 hymenopterous fauna is that of the aquatic " fairy-fly," 

 Caraphractus ductus Haliday. Mr. A. R. Sanderson found 

 several specimens of this Mymarid in an observation tank in 

 which had been placed acquatic plants brought from Austwick 

 Moss (see The Naturalist for November). A Mymarid is said 

 to have been found previously in a pond near Skipton, but 

 no record was made. 



1917 Jan. 1. 



