108 Rey. O. P. Cambridge on British Spiders. 
Fam. Dictynides. 
Genus LretuiA, Menge. 
Lethia patula, sp. n. 
Lethia patula, Sim. (in literis). 
Adult female, length 2 lines. 
Cephalothorax oblong-oval, moderately convex above ; caput 
rather long; lateral margins at its junction with the thoracic 
segments strongly constricted, fore part rather broad and trun- 
cated ; occipital region rounded, and forming the highest part 
of the cephalothorax ; hinder slope gradual; height of the 
clypeus greater than the diameter of one of the fore central 
eyes, but less than half the height of the facial space; the 
normal grooves and indentations are visible, but not strongly 
marked. The colour of the cephalothorax is yellow-brown, 
darkest on the caput, glossy, and with a few coarse hairs on 
the upper part, chiefly towards the fore part of the caput, and 
on the clypeus. 
The eyes are of moderate dimensions, and not very unequal 
in size; they are disposed in four pairs, forming two nearly 
straight lines not far removed from each other. Those of the 
anterior row are separated from each other by equal intervals 
of about an eye’s diameter. The interval between those of 
the hind central pair is rather less than that between each and 
the lateral eye of the same row on its side; those of each 
lateral pair are seated obliquely on a tubercle, but are dis- 
tinctly separated from each other, though by a rather less in- 
terval than that which separates the fore and hind central 
pairs. 
The legs are short and not very strong, and their relative 
length is 4,1, 2,3. They are of a brownish-yellow colour 
with a very faint trace of darker annulations, which may 
perhaps be more marked in some examples than in others ; 
they are furnished with numerous coarse bristly hairs ; and the 
posterior side of the metatarsi of the fourth pair have a cala- 
mistrum which runs throughout almost the whole length of 
the joint. 
The palpi are of moderate length, and are similar in colour 
and armature to the legs. 
The fulces are strong, of moderate length, prominent at 
their base in front, straight, and perpendicular; they are of a 
dark yellow-brown colour, furnished with bristly hairs, and 
armed at their extremities on the inner side with several small 
teeth of different sizes. 
