some South- American Aviculariid£e. 109 



fourth ; scopula on posterior side of trochanter of palp com- 

 posed of simple hairs. 



Measurements in millimetres. — ^ (type). Total length 

 32; length of carapace 15, width 12; length of head-region 9, 

 palp 21-5, of first leg 48, of second 44, of third 42, of fourth 

 57'5; patella + tibia of first 16*5, of fourth 18'5 ; protarsus of 

 fourth 17. 



?. Total length 41; length of carapace 17; width 14; 

 length of head-region 10"8, of first leg 39, of second 35, third 

 33*5, fourth 47 ; patella -f tibia of first 14, of fourth 16 ; pro- 

 tarsus of fourth 12. 



Log. Uruguay (type, Keyserling Coll. and British 

 Museum) ; Soriano, Uruguay {T. Havers). 



This species is remarkable for the length of the fourth leg 

 in the male, and for its stoutness in tlie female ; also for 

 having tiie patella and tibia of the fourtli longer than thosa 

 of the first leg. 



Pterinopehna tic/rinum, sp. n. 



^ . — Colour. Integument clothed with brownish hairs, with 

 a yellovvish hue on the carapace and mandibles, and a darker 

 olive-brown on the upperside of the legs and palp, which are 

 banded with yellowish-white stripes, three being on the 

 femur, two on the patella and tibia, and one at the proximal 

 end of the protarsus ; in addition to these pale bands there is 

 a narrow pale fringe at the apex of the patella, tibia^ and 

 protarsus. 



Carapace with head lower than in Cyrtopliolis venatorius, 

 a little shorter than patella and tibia of first and fourth, 

 a little longer than protarsus of fourth leg. Eyes of anterior 

 line more scattered, the medians almost a diameter from 

 each other and quite a diameter from the laterals. 



Legs 4, 1, 2,3; tibia of the first with five spines, the spurs 

 a little longer than in C. venatorius, the protarsus not bowed, 

 scopulate to base, spined at apex ; tlie second leg with about 

 six tibial spines and two internal proximal and three apical 

 protarsal spines ; tibia and protarsus of third and fourtli more 

 numerously spined ; all the femora spined at apex ; femur of 

 third a little thicker than those of the other legs, its ujipar 

 suiface only lightly convex, its sides subparalleL 



Palpus with tibia armed internally with three distal spines; 

 palpal organ shaped somewhat as in C. Bonhotei, but the 

 supine much thicker at the base, and its apex more abruptly 

 narrowed. Stridulating-oi'gan consisting of a large number 

 of closely-packed slender plumose bristles covering nearly the 

 whole of the area that bears them. 



