Field Notes. 363 



1895, and not by any means the least distinguished of the 

 goodly array of Yorkshire scientific celebrities who have 

 occupied that position. His presidential address, delivered on 

 the 30th of October of that year at York, was upon " The Study 

 of Mosses," and it is a gratifying recollection that one of the 

 ablest of the Yorkshire bryologists of to-day traces his in- 

 spiration to that address. In this connection we should like 

 to refer to The Naturalist for September 1903, where there is 

 an illustration from a photograph showing Robert Braithwaite 

 and Matthew B. Slater at Bowes, an interesting reminiscence 

 of the two leaders in the kindred subjects of mosses and 

 hepatics. 



Of his private life we have little information — except that 

 his marriage was into a botanical family — for in 1869, he wedded 

 Charlotte Elizabeth, the. daughter of the celebrated botanist, 

 N. B. Ward, F.R.S., of Clapham Rise. 



He retired from the practice of his profession in 1S99, and 

 in 1905 he completed his life's work by the publication of the 

 final part of his British Mosses. Thenceforth, he continued 

 to reside in suburban London, crowned with length of days and 

 with the honour and respect felt for him by all who knew him 

 and his works. — R. 



FIELD NOTES. 

 CECIDOLOGY. 



Records of two rare Wasp = GalIs {Cynipidae) front 

 Yorkshire. — Whilst collecting in the Leeds area last week- 

 end, we found the following Wasp-Galls, both of which are 

 worthy of record. 



Aulacidea pilosellce was added to the British List on examples 

 found by Dr. J. W. H. Harrison and R. S. Bagnall in the county 

 of Durham, where it is very local, but sometimes occurs in 

 numbers. Close search for it in Northumberland and Lan- 

 cashire on numerous occasions has always proved fruitless. It 

 affects the midrib of Hieracium pilosella, causing a short 

 swelling, generally discoloured yellowish to red, and' containing 

 a solitary yellow larva. A Cecidomyid midge causes an identical 

 gall, but the larva is of an orange colour. Yorks., in a field 

 near Bardsey (Barry Stewart). 



Xestophanes brevitarsis Thorns, on Potentilla tormentilla, 

 galls never fused. Yorks., Roundhay Park, Leeds (R. S. 

 Bagnall). — Richard S. Bagnall and Barry Stewart, October 

 10th, 1917. 



Galls of the Alpine Rose {Rhododendron ferrugineum). — 

 Not long ago I spent a pleasant half-hour in my friend Mr. 

 Lofthouse's moraine garden at Linthorpe, near Middlesbrough, 

 and had the opportunity of examining some galled plants of 



1917 Nov. 1. 



