i8o 
THE NATURALISTS’ JOURNAL. 
scens, Roebuck. 
Twenty-two species (including the doubtful L . tenellus) have 
been mentioned in these notes, comprising the total number 
known to occur in the British Isles at the present time. 
The Conchological Society’s List of British Land and Fresh¬ 
water Mollusca, issued as recently as 1892, records only eighteen 
species (with L . tenellus), and of that number Limax cinereo-niger 
(as previously remarked), is only a variety of Limax maximus. 
This shows, and very prominently, the attention malacologists 
are giving to our slugs. Mr. W. E. Collinge, of Mason College, 
Birmingham, is making a special investigation of the Aviomdce ,, 
and would be pleased to receive examples for identification, with 
his kind permission, I was enabled to reproduce the drawings of 
Avion flagellus and Avion elongatus, in this paper ; and I now take 
the opportunity of thanking him for that, and many other kind¬ 
nesses.—Bratton St. Maur, Februavy , 1894. 
THE BIRDS OF CAMBRIDGESHIRE. 
By Albert H. Waters, b.a. 
Continued from page 149. 
MOTACILLIDJE. 
AMBRIDGESHIRE is such a well-watered dis¬ 
trict that it may be imagined the wagtails are 
w T ell represented therein. Whether they are 
so or not, our readers may judge for themselves 
when they have read the following notes. 
The pied wagtail, Motacilla lugubvis Temm. 
is for the most part a summer visitor. A very 
fewindividuals stay all winter but 
most go further south in the 
autumn and return about the 
third week in March, when they 
may be seen running about the 
margins of the rivers and fen 
drains, feeding on the insects 
and small fish, and often going into the fields a distance from the 
water. It is a very fearless bird and easy to observe, and it is a 
pretty sight to see it running about by the margin of the Cam, 
so eager after the water insects cast up by the wash made by the 
oars of the practising eights, that it pays no heed to the galloping 
nags ridden by the “ coaches ” on the banks. 
Its popular name here is the “ water” wagtail, and its nests 
are diligently sought after by the boys, who find them in deep 
holes in old stumps of trees, etc., and I find by reference to one 
