captured in Rio Janeiro. 357 



thorax /^ ; breadth J ; breadth of the. abdomen y\y ; length of an 

 anterior leg f ; length of a leg of the second pair y^^j. 



The cephalothorax is large, somewhat quadrilateral, sloping 

 gradually at the base, and projecting a little beyond the falces 

 in front ; it is densely covered with hairs, and is of a deep black 

 hue, with a broad longitudinal band immediately above each 

 lateral margin, and another extending along the middle, of a 

 yellow-white colour, the anterior extremity of the latter being 

 the palest ; there is a small brown-red spot above each eye of 

 the front row, and a larger one below each lateral eye of the 

 same row. The minute intermediate eye of each lateral row is 

 nearly equidistant from the eyes constituting its extremities. 

 The falces are conical, vertical, and have a long sharp tooth on 

 the inner surface; the maxillse are straight, and enlarged and 

 rounded at the extremity, and the lip is oval. These parts have 

 a dark brown hue, tinged with red, the extremity of the maxillse 

 being much the palest. The sternum is oval ; the legs are 

 robust, and provided with hairs and sessile spines, two parallel 

 rows of the latter occurring on the inferior surface of the tibiae 

 and metatarsi of the first and second pairs ; the first pair is the 

 longest, then the fourth, and the second pair is the shortest; 

 each tarsus is terminated by two curved pectinated claws, im- 

 mediately below which there is a small scopula. These parts 

 have a brownish-yellow hue ; the legs are marked with a few 

 obscure, longitudinal, brown lines, and the first pair is the 

 darkest, particularly on the anterior side. The palpi are short, 

 strong, and resemble the legs in colour ; the radial joint projects 

 a large pointed apophysis from its extremity, on the outer side ; 

 the digital joint is oval, convex and hairy externally, concave 

 within, comprising the palpal organs, which are moderately de- 

 veloped, rather complex in structure, prominent at the base, and 

 have a curved, pointed, black spine at their extremity, which is 

 directed outwards; they are of a yellowish-brown colour, faintly 

 tinged with red. The abdomen is oviform, pointed towards the 

 spinners (which are prominent), convex above, projecting over the 

 base of the cephalothorax, and is densely covered with hairs ; 

 the upper part is of a brownish-black colour, with a broad 

 yellow-white band extending along the middle, which is crossed 

 by a brownish-yellow line at about one- third of its length from 

 the spinners ; the sides and under part are of a yellow- white 

 colour; an obscure brownish-black band extends along the 

 former, and in the middle of the latter there is a large dark 

 brown mark, which is bifid at the anterior and broader extremity; 

 a small, triangular, yellow- white spot, whose vertex is directed 

 forwards, occurs near the base of each superior spinner. 



