92 Mr. R. I. Pocock on 



Measurements in nnUimetres. — Total lenf^'th 48; carapace 

 26 ; first leg 81, second leg 78, third leg 76, fourth leg 93 ; 

 patella + tibia of first 28, of fourth 30; protarsus of first 18, 

 of fourth 26; femur of first and of fourth 24. 



Loc. Cauca (7. da Costa (type) and M. Goudot). 



Pamphobeteus ornatus, sp. n. 



^ . — Closely related to P. nigricolor and insignis, but with 

 a pinky-red bloom on the upperside. Structurally the pro- 

 tarsus of the first leg is more arcuate, its upperside being 

 evenly though lightly convex, and the lower tibial spur is 

 more on a level with the upper, so that when viewed from the 

 inside no " daylight " is visible between them. The spine of 

 the palpal organ is considerably shorter, more curved, less 

 spatulate, and not so strongly crested as in either of the other 

 species. Trochanter of palp covered behind with a pad of 

 slender but strongly jilumose bristles like feathery down. 



Measurements in viillimetres. — Total length 54 ; carapace 

 27 ; first leg 87, second 83, third 80, fourth 99 ; patella and 

 tibia of first 29, of fourth 31; protarsus of first 21, of fourth 

 31 ; femur of fourth 25. 



Loc. E-io Dagua in Colombia. 



The males of the genus known to me may be diagnosed as 

 follows : — 



«. Integument covered witli close woolly liaire ; spine of 

 pafpal organ broad and spatulate j (with steel-lalue lustre 



above) antinous. 



I. Integument, at least of legs, not noticeably woolly ; 

 spine of palpal organ attenuate. 

 «\ Dorsal surface with rosy-pink bloom ; spine of palpal 

 organ less strongly crested ; a thick pad of finely 

 feathery or downy hairs on posterior side of the tro- 

 chanter of the palp ornafus. 



h^. Dorsal surface with bluish-purple bloom ; spine of 

 palpal organ strongly crested. 

 a-. Spine more curved, the median crest of its concave 

 (anterior or spatulate) side short, high, convex, 

 and Umited to the distal extremity ; the long hairs 

 on the posterior side of the trochanter of the palp 

 delicately plumose, but without thick cluster of 



fine barbed hairs nigricolor, 



h^. Spine straighter, the median crest long, not high, 

 and extending throughout the length of the spine ; 

 posterior side of trochanter of palp furnished 

 distally with a cluster of very hue, close-set, 

 delicately barbed hairs insiynis. 



