REV. O. P. CAMBRIDGE ON BRITISH SPIDERS. 458 
not differ much in their relative size; those of the hind central pair are rather further 
from each other than each is from the lateral of the same row, on its side; those of the 
fore central pair are very nearly, if not quite, contiguous ; those of each lateral pair are 
rather obliquely placed on a slight tubercle; the height of the clypeus exceeds the length 
of the space occupied by the four central eyes. 
The labial and radial joints of the palpi are very short, the latter is produced at its 
outer extremity, a little in front, into a considerable, slightly curved, and obtusely ended 
apophysis; the digital joint is large, and of the ordinary oval form; its convex side is 
turned inwards, and the palpal organs, which are prominent and well developed, but not 
very complex, have a closely applied, strongish, double-coiled, black, filiform spine at 
their extremity. 
The legs and palpi are sparingly furnished with hairs, and the former with one or two 
slender erect bristles. 
An adult male of this spider was found by myself at Bloxworth in June 1870, running 
among grass and débris of various kinds in a damp meadow. 
Although bearing so much general resemblance to many other small spiders, it is yet 
a very distinet species, and easily distinguished by the palpal form and structure above 
detailed. 
Genus WALCKENAËRA (BL). 
WALCKENAÉRA LATIFRONS. (Pl. XXXV. no. 31.) 
Walckenaéra latifrons, Cambr. Zoologist for 1863, p. 8594. 
This species is distinguished by the boldness and breadth of the cephalie eminence. It 
is not very rare among moss in woods at Bloxworth in April and May. 
WALCKENAÉRA ERYTHROPUS. (Pl. XXXV. no. 34.) 
Erigone erythropus, Westr. Ar. Suec. p. 237. 
Walckenaéra borealis, Cambr. Zoologist for 1862, p. 7967. 
I have found this species (of which the typical examples were captured in Scotland) 
also at Bloxworth. The structure of the palpi and palpal organs is peculiar, and serves 
to distinguish it from its near allies. 
WALCKENAÉRA TRIFRONS. (Pl. XXXV. no. 32.) 
Walckenaéra trifrons, Cambr. Zoologist for 1863, p. 8589. 
A second example of this very distinet species was kindly sent me by the Hon. T. de 
Grey, now Lord Walsingham, of Merton Hall, Norfolk, in 1870. The first was taken by 
myself at Bloxworth in 1861. 
WALCKENAERA ALTIFRONS. (Pl. XXXV. no. 33.) 
Erigone acuminata, Westr. Ar. Suec. p. 229. 
Walckenaéra altifrons, Cambr. Zoologist for 1863, p. 8593. 
Since the capture of examples of this spider at Lyndhurst in 1860, I have received it 
rom the late Mr. Richard Beck, by whom it was found near London in 1864. 
