LEPTYPHANTES.—PHYSOCYCLUS. 263 
quadrangle very nearly a square; the fore side perhaps slightly shortest. Those of each of the lateral 
pairs are seated on a tubercular prominence, contiguous, and their direction oblique. 
Legs tolerably long, slender, 4, 1, 2,3; two or three long and slender spines on the tibie of the first and 
second pairs, one on the outside of the metatarsi, and one on the outside of the tarsi near the hinder end. 
Colour dull orange-yellow, the anterior sides of the femora and the fore extremity of the tibie dark 
yellow-brown. 
Falces neither long nor very strong, straight. Colour dark yellow-brown, with the fore extremity pale 
yellow. 
Palpi dark yellowish-brown, devoid of terminal claw. 
Mawille short, a little inclined to the labium ; colour blackish-brown. 
Labium short, broader than long, rounded at the apex; similar in colour to the maxilla. 
Sternum longer than broad, broadly obtuse at the hinder extremity. The interval between the coxe of the 
fourth pair of legs equalling the length of the joint. Colour black-brown. 
Abdomen short-oval, tolerably convex above, in profile highest towards the hinder part ; colour dull luteous ; 
the upperside is almost entirely covered by a large triangular black area, the apex of the triangle touching 
the anterior extremity and the base nearly halfway down the posterior slope ; a broad oblique black band 
on each side forwards, and the underside black, leaving a largish somewhat quadrate pale luteous patch 
just in front of the spinners. The genital aperture is of a quadrangular form, broader than long, and 
placed behind a large roundish convexity. 
Hab. Guatemaa, upper road to Chichochoc, Coban (Sarg). 
It is with some doubt that I have placed this spider in the genus Leptyphantes, the 
presence of a long slender spine on the outside of the tarsi of the first and second pairs 
of legs, along with some other slight differences, may perhaps, on the discovery of 
other species, lead to their generic separation from the typical Leptyphantes. 
PHYSOCYCLUS, Simon. 
Physocyclus rotundus, sp. n. 
Adult female, length 13 lines. 
Cephalothorax yellow, tinged with yellow-brown on the caput and in the normal indentations. 
Eyes in three groups, three large ones on each side in a triangle, the two posterior ones contiguous to each 
other, the third in front contiguous to the hind-lateral, but not to the hind-central eye ; the two minute 
eyes between these groups are in a straight line with their anterior eyes, and are near together but not 
contiguous, and are also nearly an eye’s diameter distant from them. The height of the clypeus is more 
than double that of the facial space. 
Legs long, slender, 1, 4, 2, 3, or 1, 2, 4,3; yellow, immaculate, furnished with long hairs, but these had 
mostly been rubbed off, leaving, however, the minute tubercles on which they were placed. The length 
of the first pair did not greatly exceed that of the fourth. 
Falces with a tooth at the extremity on the inner side. Colour like that of the cephalothorax. 
Maville rather long, straight, but greatly inclined over the labium, somewhat pointed at the extremity. 
Colour pale yellow-brown. 
Labium rather large, in advance of the maxille, and convex in front, much broader than high, rounded (or 
sub-pointed) at the apex. Colour similar to the maxille. 
Sternum broader than long, somewhat heart-shaped or subtriangular, the posterior extremity being, however, 
very broadly obtuse. 
Abdomen nearly globular, higher than long ; behind the genital aperture, which is a simple transverse fissure, 
is a transverse yellow-brown prominent plate in which are contained the spiracular openings ; at a very 
short distance behind these are the spinners, placed at the apex of a subconical prominence, and of a 
yellow-brown colour. The abdomen is of a dull whity-brown hue, mottled obscurely with a darker colour. 
Hab. Guatemaa, Coban (Sarg). 
