200 
Field Notes. 
specimen of the very rare macropterous or developed form of the 
male of Nabis limbatus. It was obtained by sweeping among 
long grass. While the undeveloped form of this species is 
very plentiful and widely distributed in Yorkshire, as else- 
where, the macropterous form is very rarely met with. 
Saunders notes it as ‘ exceedingly rare.’ Mr. E. A. Butler 
has been good enough to confirm my identification. — J. M. 
Brown, Sheffield. 
Food of Boreus. — In The Naturalist for July, 1921, I 
stated that the food of Boreus was probably the juices of 
dead insects. Since then I have had further opportunities 
for observation, and am now convinced that my previous 
result was due to artificial conditions, there being no other 
food available. On several occasions since I have seen speci- 
mens chewing the bases of moss leaves, on the sap of which 
they seem to feed. If this is the natural food of the insect, 
Boreus is probably the only member of the mecoptera which 
is wholly herbivorous in diet. — C. L. Withycombe, Waltham- 
stow, April, 1922. 
— : o : — 
MAMMALS. 
White -beaked Dolphin in Yorkshire.— At Easter, 1919, 
I found a White-beaked Dolphin about high-water mark, at 
Stainton Dale, near Scarborough. It was 8' 6" long, and a 
male. Unfortunately, it had suffered a slight damage about 
the tip of the snout. The skeleton was obtained, and is now 
in our departmental Museum. Mr. J. W. Clarke tells me that 
there is a skeleton of a Yorkshire example in the Museum at 
Edinburgh University, but I have found no record of any 
other specimen from our part of the coast. — E. Percival, 
Dept, of Zoology, Leeds University. 
From the ‘Reports on Cetacea,” issued by Sir Sidney 
F. Harmer, of the British Museum, it would seem that a 
Whit ( e-beaked Dolphin occurred at Redcar in 1914, another at 
Skinningrove in 1915, and ‘ off the Yorkshire Coast * in 1917, 
and more recently quite a number of records for Lincolnshire 
and Norfolk and Suffolk. — T.S. 
— : o : — 
BOTANY. 
Claytonia perfoliata in Nottinghamshire.— Some plants 
of Claytonia perfoliata were recently seen about three miles 
S.E. of Blyth, in a hedge bottom on the north side of the 
road between Bilby Gate and Knives Hill Plantation. It 
will be interesting to see if this extends hereabouts. I have 
no information as to the occurrence or distribution of this 
Naturalist 
