THOMISUS. 
85 
brown colour, with the exception of the femora; those of the first pair, the anterior half of 
those of the second pair, and the extremity of those of the third and fourth pairs having a 
brownish-black hue, faintly tinged with red; the first and second pairs are longer than the 
third and fourth pairs, and are nearly equal in length, the second pair being slightly the 
longer, and the fourth pair surpasses the third in longitudinal extent; each tarsus is terminated 
by two curved, pectinated claws. The palpi are short; the colour of the humeral and digital 
joints is dark-brown, that of the cubital joint is yellowish-brown, and the hue of the radial 
joint is reddish-brown ; the radial is much stronger than the cubital joint, and projects from 
its extremity, on the outer side, a slender, slightly curved, pointed apophysis, which is very 
prominent, and an obtuse one, situated underneath, w r hich has a process at its base, on the 
outer side; the digital joint is oval, convex and hairy externally, concave within, comprising 
the palpal organs; these organs are highly developed, complicated in structure, with a strong, 
prominent point near the middle, a filiform spine curved from the outer side round their 
extremity, and are of a dark-brown colour, tinged with red. The cephalo-thorax is com¬ 
pressed before, rounded on the sides, truncated in front, and abruptly depressed at the base ; 
the sides are black, marked with a longitudinal band of a clear, red-brown colour, and a broad 
band of the latter hue extends along the middle. The eyes ^arm a crescent on the anterior 
part of the cephalo-thorax; the lateral eyes are seated on tubercles, and are larger than the 
intermediate ones, those of the anterior row being the largest of the eight. The falces are 
short, subconical, vertical, and of a dark-brown colour, with a red-brown spot in front. The 
maxillae are convex near the base, and enlarged where the palpi are inserted; and the lip is 
triangular. These parts have a brown tint. The sternum is heart-shaped, and of a yellowish- 
brown hue. The abdomen is depressed, corrugated, particularly on the sides, sparingly 
supplied with short, strong hairs, and is broader at the posterior than at the anterior extremity, 
the latter, which appears as if cut in a straight line across, projecting over the base of the 
cephalo-thorax; it is of a yellowish-brown colour above, encircled by a band of yellowish- 
white; on each side of the medial line there is a broad, irregular, longitudinal band of a dark- 
brown hue extending nearly to the spinners, immediately above which organs there are 
several transverse, yellowish-white streaks; in the middle of the space included between the 
dark-brown bands there are two dark-brown lines forming a very acute angle whose vertex is 
directed backwards, and in its anterior part there are five circular, yellowish-brown depressions ; 
three are disposed in the form of a triangle, having its vertex directed forwards, and the 
other two are situated parallel to its base; the sides and under part are of a dark-brown hue, 
mottled with yellowish-brown; and the spinners and branchial opercula are of a yellowish- 
brown colour. 
An adult male of this species was taken among grass in a pasture at Oakland, in June, 
1846; and several individuals of the same sex have since been met with running on the 
ground in fields near Llanrwst. Males of Thomisus trux have also been captured in Scotland, 
by Mr. J. Hardy. 
