408 REV. O. P. CAMBRIDGE ON NEW BRITISH SPIDERS. 
enlarged laterally near the middle, and blunt-pointed behind. The upperside is of a 
deep rich red-brown colour, very sparingly furnished with short bristly hairs, and irre- 
gularly bordered with yellow, most conspicuously so near the fore part. An obscure 
streak of paler red-brown (yellowish near the fore margin) divides the abdomen longi- 
tudinally, ending with two confluent short yellow streaks near the spinners, where it also 
joins with the marginal yellow border; the hinder half of the abdomen has (besides the 
above) four transverse yellow streaks, or dashes, two and two, issuing from either side of 
the longitudinal division, but not reaching quite to the margins. Probably some varia- 
tion exists in different specimens in the colour and continuity of these abdominal mark- 
ings. The underside is more thickly furnished with short bristly hairs than the upper- 
side; the specimen described from was wrinkled and less deep in colour beneath than on 
the upperside. The five characteristic depressed spots on the upperside are visible, but 
not so conspicuous as in T. cristatus. 
This species is very closely allied to Thomisus bifasciatus, from which the male differs 
in being darker and more richly coloured, and in the structure of the palpi and palpal 
organs. For the purpose of comparison, figures are given (Pl. 54. no. 9, figs. e, f, y) of 
the palpi and palpal organs of Thomisus bifasciatus. One female and one male only have 
yet been obtained, though the locality in which these were found has been closely 
searched, off and on, for some years. The female was captured in September 1857, on - 
Bloxworth Heath, and is figured and described by Mr. Blackwall in Part I., * Brit. and 
Irish Spiders, pl. iv. fig. 47, p. 81. The male from which the above description has 
been made was captured near the same spot as the female, in the month of May 1854, 
and was for several years mistaken for Thomisus bifasciatus. The figures given will 
show at once the differences in palpal structure between 7. Cambridgii and T. 
bifasciatus. 
THOMISUS PALLIDUS. (Pl. 54. no. 10.) 
Thomisus pallidus, Blackw. Brit. and Ir. Spid. p. 82, pl. iv. fig. 48 (2); Cambridge, Zool. for 1861, 
p. 7557. 
The female only of this rare and distinet Thomisus has hitherto been described. The 
male (of which but two examples, both adult, have come under my notice during a space 
of 15 years) is sufficiently like the female to require no lengthened description. Its 
general colour is yellow, of a more or less deep tinge, overlaid and mixed with whitish, 
and, like the female, the abdomen is marked, though not very thickly, with some black 
spots on the upperside. The palpi, which form the specially distinctive character of the 
species, are short and strong; the radial joint is broader, but shorter, than the cubital, 
and has several projections from its extremity; one in front towards the outer side is 
broad, but blunt-pointed, and has its extremity in close proximity to the base of the 
digital joint; another of about equal length with the first, and obtusely pointed at its 
extremity (which is nearly black, and appears like a corneous addition), is very pro- 
minent, and situated on the outer side of the radial joint; beneath these two, towards 
the underside is the third, of larger size and of a crescent-shape, the hinder limb (next 
to the digital joint, and closely adhering to it) being the largest, and the other limb of a 
