•440 THE PHALANGIA AND PEDIPALPI IN WESTERN SOUTH AMERICA, 



O. marginatum, n. sp. 



Cephalothorax dark reddish-brown. Margin provided with a double greenish-gray band 

 (alcoholic specimen), which, posteriorly, involves the whole of the abdominal scutal seg- 

 ments, where it is interrupted by a central band ; the surface divided into two portions by 

 a deep transverse groove at the position of the third pair of legs ; the anterior surface thus 

 formed smooth ; the posterior divided again into three parts by two transverse lines, the an- 

 terior of which communicates with the first line by a central longitudinal line, so as to form 

 two little squarish islets of surface, in the centre of which are one or more small tubercles ; 

 the surface between the second and third line furnished with several tubercles arranged 

 in a transverse series ; posterior to the third line is a pair of very prominent, large spines, 

 whose surface is minutely tuberculate. Eye-eminence double, smooth, low, with four 

 (two light-colored, two blackish) eyes on each side. Maxillae with the last joint large, 

 areolated, attached by its end. Palpi ]. Ventral surface smoothish. Coxse minutely 

 roughened. Posterior pair of legs minutely tuberculate on their femora. (PI. 24, fig. 7.) 



Length of body, T 3 g ". 



Suborder PEDIPALPI. 

 Genus Phrynus. 

 P. gorgo, n. sp. . 

 Dorsum blackish-chestnut, roughened with minute tubercles. Cephalothorax reniform, 

 truncate anteriorly, with its margin elevated and obsoletely crenulate. Anterior eyes situ- 

 ated on an oval eminence, which is truncated above. Palpi long and slender, with the maxil- 

 lary process at their base pronounced ; their trochanters irregularly triangular, with three 

 more or less distinct faces ; on the inferior of these, near its anterior margin, is a more or less 

 distinct obsoletely crenulate ridge, terminating anteriorly in a robust, moderately large spine, 

 and, posteriorly, in a robust, blunt, dark-reddish chestnut, cylindrical process, tipped with a 

 light, reddish-brown ; there are two or three other spines on the ridge separating the ante- 

 rior-superior from the inferior face ; the anterior-superior face is separated from the posterior 

 by a more or less pronounced crenulate line : the femoral article sub-cylindrical, sparsely 

 tuberculate ; its superior-anterior edge with three large unequal spines on its proximal part, 

 and one or two smaller ones placed more distally ; its inferior-anterior edge with four large 

 (two very large), unequal proximal spines, and two smaller, more distal ones: tibial or 

 penultimate article sub-cylindrical, granulate as the last ; its anterior-superior margin with 

 three immense distal spines and two very small ones, also with one or two moderate, 

 more proximal ones; its anterior-inferior margin with five unequal spines on its distal 



