Genera of S.-American Aviculariide. aol 
however, I should say, specifically distinct from hirsutum, 
on account of the greater length of its posterior legs and 
difference of colour. Moreover, no mention is made in the 
diagnosis of the tibial process of the second leg, 
Part I1].— Genera dismembered from Kurypelma. 
Genus CITHARACANTHUS, nov. 
Resembling Lyroscelus, F. Cambr., in possessing a system 
of stout plumose stridulating-bristles upon the trochanter of 
the palp and first leg; but differing in the presence of a 
second organ upon the coxe of these appendages, the organ 
consisting of a large number of short, stout, almost conical 
spines, terminating in a long, filiform, frequently fractured 
extremity, and rising in the midst of a thick cluster of simple 
hairs. ‘These spines occur both above and below the suture 
on the coxa of the first leg, and near the upper margin of the 
posterior side of the coxa of the palp. 
Type Citharacanthus longipes, F. Cambr. (sub Hury- 
pelma). 
Citharacanthus longipes (F. Cambr.). 
Eurypelma longipes, F. Cambridge, Biol. Centr.-Amer., Araneidea, ii. 
p. 21, pl. i. figs. 15 a—e (1897). 
The type of this species is an adult male taken at Chico- 
yoito in Guatemala. An adult female from the same locality 
presents the same structural features. ‘The specimen from 
Cubilquitz, doubtfully referred to this species, belongs to the 
genus Brachypelma. 
Genus PTERINOPELMA, nov. 
Resembling Brachypelma in having the posterior side of 
the trochanter of the palp and the anierior side of that of the 
first leg scopulate with fincr or coarser delicately plumose 
hairs, but without scopula of similar hairs upon the anterior 
inner side of the femur of the first leg, and the inner side of 
the coxa of the first leg clothed with simple hairs with 
slender not spiniform bases. Protarsus of first leg closing 
outside the lower tibial spur. 
Type Pterinopelma vitiosum, Keys. (sub Eurypelma). 
Distribution. Southern part of North America (Monte 
Video, Uruguay, &c.). 
Genus DUGESIELLA, nov. 
A scopula of very delicately, almost invisibly, plumose 
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