42 Yorkshire Naturalists Union : Annual Report, 1916. 



The past season has not been favourable for aerial Hymen- 

 optera, although additions have been made in parasitic groups. 

 The capture of Vespa germanica near Keighley makes the 

 list of British social wasps complete for the West Riding. 



Mr. J. F. Musham writes : — ' Throughout the Selby district 

 Bombi have been scarce during the summer.' This appears 

 to have been the case in other parts of the County where 

 information has been obtained, though apparently normal 

 numbers of queens appeared in spring. A large number of 

 fertile queens of both social bees and wasps perished as a result 

 of cold during May. Another specimen of Sir ex juvencus, 

 writes Mr. E. G. Bayford, is recorded by the Rev. F. D. Morice 

 (Trans. Ent. Soc. 1916 p. 10). The only genuine British 

 specimens of this insect have both occurred in Yorkshire, viz., 

 at Doncaster and at Wakefield. 



Good work in the order Diptera has been done by members 

 of the Bradford Naturalists' Society, and a number of critical 

 specimens are still in the hands of the Society's recorder, Mr. 

 J. H. Ash worth, awaiting further examination. Dolichopus 

 discifer, taken by Mr. F. Rhodes at Sunnydale, Bingley, is a 

 noteworthy addition. Ischyrosyrphus glaucius has been taken 

 at Grassington and WoodhaJl Hills. Mention here should be 

 made of the occurrence of the new and rare dipteron Xylophagus 

 ater determined by Mr. Grimshaw (Skelmanthorpe, 1915, Mr. 

 B. Morley). Mr. W. H. Burrell makes an addition in the shape 

 of the gall-fly Asphondylia ulicis, Verrall. He says an inter- 

 esting point is that at Allwoodly Moor, near Leeds, Ulex gallii 

 is the host ; a few galls have been seen on U. europaeus, but 

 bushes of U. gallii are most affected. This is perhaps due to 

 the period of flowering. The fly emerges freely in September 

 when U. europaeus has ceased flowering. The following are 

 also additions, Culex nemorosus (Bradford), Bibio lacteipennis 

 (Oakworth), and Catabomba selenitica (Board Hill). 



Hemiptera-Homoptera have received no attention apart 

 from the account of ' The Psyllidge of the Clevelands,' by J. 

 W. H. Harrison, Naturalist, December, 10,15, wherein 22 

 species are mentioned. 



Arachnida. — Mr. W. Falconer writes : — During the year, 

 the following papers dealing with the Arachnida of the county 

 have been published in the Naturalist : (1) The Harvestmen 

 and Pseudoscorpions of Yorkshire, March to June. (2) in 

 ' Yorkshire Naturalists at Bo'ton Woods," August. (3) The 

 Distribution of Spiders in the East Riding, September and 

 December. (4) Foreign Spiders in Yorkshire, November. 



Late in 1915 and early in 1916, Mr. Stainforth forwarded 

 for identification, a very extensive collection of spiders, etc., 



Naturalist, 



