some South- America^i Aviculariidte. 113 



Janeiro. The male of it, however, is, so far as I can ascer- 

 tain, unknown, and until it has been determined that the 

 main generic feature of the genus, namely the division of the 

 fourth tarsal scopula, is not due to immaturity, it seems idle 

 to discuss the genus further. Of Jletnopslma we do iinow 

 the male. 



The genus Miaschistopus, which I was led by an error of 

 locality into establishing, is identical with Metriopelma. 



Metriopelma velo.v, sp. n. 



c? , — Colour deep mahogany-brown, hairy clothing brown 

 with golden reflections. 



Carapace scarcely as long as patella and tibia of third leg, 

 a little longer than tibia of fourth, a little shorter than patella, 

 tibia, and tarsus of palp ; eyes of anterior line procurved, 

 subequally spaced, the medians a little larger, about half a 

 diameter apart, the posterior edge of the laterals behind the 

 centres of the medians. 



Le(js long and slender, 4, 1, 2, 3 ; patella and tibia of first 

 subequal to those of fourth and to protarsus of fourth ; first 

 leg with one apical spine on femur, one interior apical spine on 

 patella, two internal, two external, 2, 2 inferiors on the outer 

 side, and 2, 2 at apex, protarsus armed on inner side with three 

 spines, two in basal half, one apical, on outer side with one 

 submedian, and beneath with three apical and two in basal 

 half externally ; second leg armed like the first, except that 

 the protarsus is armed with five inferior spines on proximal 

 side of scopula ; third leg with two apical spines on femur, 

 two anterior and one posterior spines on patella, tibia armed 

 like that of first, its protarsus armed with about 21 spines ; 

 fourth leg with one femoral and one posterior spine on 

 patella, its tibia and protarsus with more spines than on 

 those of second leg. First leg with tibia and protarsus un- 

 modified ; third leg with femur considerably thickened ; tarsal 

 scopula of fourth completely divided, of third entire ; protarsal 

 scopula of first extending almost to base, of second leaving 

 basal third uncovered, of third covering apical third, of fourth 

 scanty. Labial and maxillary spicules scanty. 



Palp long, extending past patella of first leg, femur and 

 patella unspined ; tibia thick, fuc^iform, with an external 

 apical emargination, armed above with about twelve spines, 

 whereof eight are apical, and beneath with one external and 

 one internal ; palpal organ with short, stout, triangular, 

 externally carinate spine. 



M^easurements in millimetres. — Total length 28 ; carapace 

 A7in. & Mag. N. Hist. Ser. 7. Vol. xi. 8 



