Thompson : Descliampsia discolor in Yorkshire. 



63 



LiMAX MAXIMUS. Very plentiful, and frequently seen at nig-ht crawling^ 



about the tree trunks. 

 Var. FASCIATA. Fairly plentiful. 



Var. FERUSSACI. One on 26th June 1902 on a beech tree. 

 *LiMAX ARBORUM. Xot uncommon about the beeches, on the trunks of 



which it is seen crawling- at nig-ht. 

 *Agriolimax agrestis. Very much too common ; unusually abundant 

 during- the last two summers, doing- considerable damag-e to the turnip 

 and mang-old-wurzel crops in the neig;hbourhood, 

 *Var. sylvaticus. Plentiful with the type. 



Agriolimax Lcevis, a few, from among^ dead leaves in moist places. 



Ariox ater. Fairly plentiful. I have seen it feeding- on the leaves of 

 growing plants of ivy in the wood. ^Nlr. Kew and I found an adult 

 individual, of typical colour, on the grassy slope as early in the year as 

 the 23rd of April, at which time we rarely see larg'e examples in this dis- 

 trict. On 28th August 1902, about mid-day, I observed two individuals 

 in copulation. They were among- the herbage in the hedg-e bottom at 

 the foot of the grassy slope. 



Var. BRUNXEA. One or two. 



\^ar. SWAMMERDAMII. One specimen. 



Arion intermedius. Fairly plentiful among- dead leaves in moist places. 

 *Arion HORTEXSIS. Fairly plentiful. 



Ariox circlmscriptus. A few. 

 *Pyramidula rotuxdata. \'ery plentiful. 



Var. TURTOXii. A few. 

 "PUXCTUM PVG>L^:uM. Fairly plentiful. 



Sl'CCIXEA elegaxs. Fairly plentiful on the herbag-e by the stream. 

 SpH-^;rium CORXEI'.M. A fev\- in the more slug-g-ish parts of the stream. 

 PisiDR'M AMXICUM. Found with the last named. 

 PisiDiUM PUSiLLUM. Fairly plentiful in stream. 



FIELD NOTES. 



FLOWERING PLANTS. 

 Deschampsia discolor in Yorkshire. — Last August I 

 observed a large quantity of a grass which seemed new to 

 me, growing- in a very wet bog- on Skipwith Common, East 

 Riding, \^.C. 61 ; and I came to the conclusion it must be 

 Deschampsia discolor Roem.&Schult. =z4zra setacea Huds.=.4. 

 uliginosa Weihe. The name has recently been confirmed b\- 

 Mr. J. W. White, F.L.S., of Bristol. The grass was spread 

 o\'er about an acre, and much of it was actually growing- in the 

 water. This species appears to have been recorded from only 

 one spot in Yorkshire, viz., 'Sparingly in very wet peat in the 

 southern part of Thorne Moor,' which is in the extreme east of 

 the West Riding (V.C. 63) and due south of Skipwith. Though 

 yet recorded from so few counties the range of this species in 

 Britain appears to extend from Hampshire to Sutherland. — 

 H. Stuart Thompson. 



1904 P'ebruary i. 



