26 
NEW AND RARE YORKSHIRE SPIDERS. 
J. W. HESLOP HARRISON. B.Sc. 
Middlesbrough. 
SINCE my last paper dealing with the Arachnid Fauna of 
Cleveland appeared, two very remarkable species have been 
discovered in this area and, in taking this opportunity of 
recording them, I append notes on other spiders, important 
either as being new to the North Riding, or as affording new 
localities for rarer species. 
Corniculania karpinskit Camb.—This is an Arctic and 
Alpine species, first described from abroad by the Rev. 
O. P. Cambridge as Evigone karpinsku,* although it is 
very probable that the species described as Evigone pavi- 
tans from Cheviot is the same spider, in which case, as 
the Rev. J. E. Hull informs me, the name karpinski will 
sink to pavitans, the latter having a slight priority. Granting 
that C. pavitans and C. karpinskit are synonyms, then the 
first British record would be that of the solitary type female 
takenin 1872. Ifthe two spiders are to be regarded as different 
then the -first Bricish record was made by the Rev. O. P. 
Cambridge in recording Mr. W. Evans’ Leadhill, Lanarkshire. 
capture in 1900, the second being made in the same note and 
referring to captures made by Dr. Jackson in 1900, in Cumber- 
land. My captures, therefore, in this neighbourhood, provide 
the third British and the first Yorkshire specimens. 
Strange to say, however, my specimens came from the 
marshes at the mouth of the Tees just within the breakwater, 
at a point which has quite unexpectedly yielded other Arctic 
forms, e.g., the beetle Miscodera arctica Payk. This, of course, 
affords scope for the suggestion that the proximity of the 
port of Middlesbrough is responsible for the occurrence of 
the spider here. All I can say is that a passage from Middles- 
brough to its Cumberland locality could be more easily made 
than to the present one. Asa matter of fact, such a journey, 
for a spider, is a physical impossibility. Further, I have now 
taken all the species of Cornicularia, except C. kochit, both on 
the sea coast and on the hills, and, 1n the case of that spider, 
I have taken it on the coast, whilst my uncle has captured it 
in the hills in Northumberland. In connection with this, it is. 
scarcely necessary to refer to the well-known distribution of 
certain plants, e.g., Plantago maritima, found both on the sea 
coast and in mountainous districts. 
Cnephalocotes ambiguus Camb. This species was des- 
cribed+ from a single male taken by Mr. W. Evans, in Arran 
* Proc. Zool. Soc., 1873, page 447. 
+ In the Proc. Dorset N.H. and A. F. C., vol. XXVI., page 67. 
Naturalist, 
