282 Mr. R. I. Pocock on the Pedipalpi of the Family 



Chelce rather slender ; spines long and arranged upon the 

 same plan as in T. azteca, but the spines are much longer, 

 the first and second on the lower surface of the femur being 

 subequal and much longer than the third, which is about 

 equal to the fourth ; the first greater than the height of the 

 segment ; spines on the upper edge of the tibia very much 

 longer than in azteca, the longest being greater than the width 

 of the segment ; the first spine on the upper edge of the tarsus 

 long, the third minute, the first and third on the lower surface 

 minute. 



Legs long ; femur of first more than twice the width of the 

 carapace, that of the second greater than this width by one 

 third of its length, shorter than that of the third and about 

 equal to that of the fourth ; tibia of the second about equal 

 to its femur, that of the third greater by about the length 

 of the patella, that of the fourth still greater as compared 

 with its femur; the second and third tibials about two thirds 

 the length of the first, about equal to the protarsus, the second 

 less than half the length of the third and equal to about 

 two thirds of the distance between the eyes. 



Measurements in millimetres. — Total length 19 ; carapace, 

 median length 7, width 11, distance between eyes 3*2. Chela : 

 length of femur 5, height 2, length of longest spine 2*8 ; tibia, 

 length 8, width 2"8, longest spine 3'5, tarsus and digit 4. 

 Legs : femur of first 24, of second 16, of third 17*5, of fourth 

 15*5; tibia of second 16, of third 18*5, of fourth 18'2. 



Loc. S. America. A single dry male example. 



Tarantula Thorellii, sp. n. (PI. VII. fig. 7.) 



Colour chestnut ; abdomen pale, without distinct pattern ; 

 femora of legs feebly spotted. 



This species is nearly related to T. tessellata and T. Pallasii, 

 but it is much smoother than either. The distance between 

 the lateral eyes is less than half the median length of the 

 carapace ; the median tubercle is separated from the anterior 

 border by a distance which is about equal to its longitudinal 

 diameter ; this border is emarginate and dentate, as in T. Pal- 

 lasii and T. tessellata, but the median frontal process does not 

 project forwards as in T. tessellata, being considerably over- 

 lapped by the carapace. 



The chelce are long and slender, as in T. tessellata, the 

 trochanter armed with 4 spines, as in Pallasii and tessellata ; 

 spine-armature of femur and tibia approximately the same as 

 in T. tessellata and Pallasii, but the first superior femoral 

 spine is much shorter, being scarcely more than one third of 



