DELOZEUGMA. 225 
DELOZEUGMA, Cambridge. 
Delozeugma mordicans, sp. n. 
Adult male, length 5 lines (length of falces 2-23 lines). 
In general form and appearance this species resembles closely D. formidabile (anted, p. 106, t. 14. fig. 5), but 
the different form of the palpi distinguishes it at once. 
Cephalothorax bright reddish-yellow-brown, darkest on the caput, with a broad, somewhat irregularly defined, 
darker longitudinal band and a narrow marginal border on each side; the surface is finely granulose and 
covered at least on the sides with short whitish hairs; the height of the clypeus is equal to the diameter 
of the fore-central eyes. 
The eyes of the posterior row and the fore-laterals are of equal size, the fore-centrals considerably larger ; the 
interval between the latter is rather more than half a diameter, and each is about half that distance from 
the fore-luteral eye next to it; the interval between the hind-central pair is rather more than that 
between each and the hind-lateral next to it; viewed from in front the anterior row is straight, but 
looked at sideways it is slightly curved, the convexity of the curve directed backwards. The convexity of 
the more strongly curved posterior row is distinctly directed backwards. The eyes of each lateral pair are 
separated by less than half a diameter. 
The legs are of tolerable length and strength, 4, 1, 2,3 or 4, 2, 1, 3—the difference between 1 and 2 very 
slight; they are of a brownish-orange-yellow colour, armed with rather slender spines, of which those 
beneath the tibize and metatarsi are arranged in a longitudinal series of pairs; those, however, on the 
third and fourth pairs are the least regularly placed. There is a not very dense scopula beneath the tarsi 
and the anterior portion of the metatarsi and a compact claw-tuft beneath the tarsal claws. 
The palpi are moderately long, yellow, excepting the radial and digital joints. The humeral joint has three 
short spines on its upperside near the fore extremity, 1,2. The cubital and radial joints are of about 
equal length; the latter is of a deep red-brown colour, a little protuberant at its anterior extremity in 
front, and has at its outer extremity a strong apophysis as long as the joint itself, broad, obtuse, and 
broader at the extremity than at its origin, in fact of a hollow spoon-like form, and, looked at sideways, 
a little directed backwards. The digital joint is large, of an elongate-oval form, and longer than the 
radial and cubital joints together ; it is of a dark yellow-brown hue, and pretty thickly clothed with short 
fine hairs. The palpal organs are simple, of an oval bulbiform shape, and occupy the greater part of the 
concave side of the digital joint. 
The falces are very long and strong, straight, divergent, similar in colour to the cephalothorax, and very 
strongly, though not horizontally, porrected ; they are equal, or nearly, in length to the cephalothorax. 
The fangs are long, strong, slightly curved, and have a small subdentiform prominence near the base on 
the inner margin; they are articulated to the falces a little obliquely, though more nearly horizontally 
than vertically, and, when at rest, lie along their lower margin, which has, just about the middle, 
two strong teeth in a longitudinal line directed forwards; the front tooth is strongest, longest, and curved, 
and has a flattish disc-shaped, semicircular, enlargement in front of its extremity. 
The mawille and labium are yellow-brown and the sternum yellow. 
The abdomen is brownish-yellow, the sides and hinder part black-brown; two longitudinal black-brown 
parallel spots or short stripes are on the fore half of the upperside, followed towards the spinners by a series 
of several broken, oblique, blackish lines on either side, representing the ordinary angular bars or chevrons, 
Spinners short, compact, the inferior pair strongest ; just in front of them is a small corneous-looking, 
angular, red-brown point—colulus ? 
Hab. Guatemata, Cahabon and Tactic in Vera Paz (Sarg). 
Mr. Sarg remarks on the example from Cahabon, that it “jumps freely”; and on 
that from Tactic, that the colour of the cephalothorax was dark sepia. ‘“ Legs and palpi 
dark Roman ochre; lobes on palpi (no doubt the apophysis above noted) black, with 
greyish hairs ; falces enormous, dark brown; abdomen dirty yellow-ochre, markings 
sepia ; underneath pale brown; sternum burnt sienna.” ‘The colours, therefore, as is so 
commonly the case, had somewhat changed in spirit of wine. 
BIOL, CENTR.-AMER., Arachn. Aran., February 1897. 2ay 
