544 Mr. R. I. Pocock on some 
many, sometimes clavate, sometimes attenuate, stout plumose 
bristles upon the posterior side of the trochanter of the palp, 
and a corresponding cluster of plumose, mostly attenuate 
spines, intermixed with one or two simple spines, on the 
anterior surface of the trochanter of the first leg. 
The discovery of these organs enables the females of this 
genus to be classified. Previously the genus was recognizable 
mainly from the characters of the male sex. 
I have added the name Callyntropus to the synonymy of 
Acanthoscurria on the supposition that the former is based 
upon specimens in Keyserling’s collection which Ausserer 
determined as Callyntropus convexus, C. Koch, converus 
being cited as the typical species of Callyntiopus. There 
is, however, no evidence beyond Ausserer’s opinion, of which 
the value is more than doubtful, that this specimen is co- 
specific with Hurypelma convexa, C. Koch. Nevertheless, I 
presume that the genus must rest upon the species represented 
by the specimens examined and diagnosed by Ausserer. As 
I have already pointed out (Ann. & Mag. Nat. Hist. (6) xv. 
p. 226, 1895), the division of the tarsal scopula in Callyn- 
tropus is nothing but a sign of immaturity. 
Genus Lastopora, Koch, emend. 
( =Lusiodora, Koch, Ausserer, and Simon in part.) 
This genus, as recognized by Ausserer and Simon, I find 
to be capable of severance into four distinct genera: Lasio- 
dora (sensu stricto, type L. Klugit), Pamphobeteus, nov. (type 
L. nigricolor, Auss.), Megaphobema, nov. (type L. robustum, 
Auss.), and Phormictopus, nov. (type L. cancerides, Latr.,= 
Erichsonii, Koch). 
Out of the crowd of species referred by Koch to Lastodora, 
Simon has selected L. Klugit as the type. Specimens of 
this species in the British Museum. from Brazil (Iguarassu, 
So Paulo, &e.) and from Recife and Cabo in the Argentine 
have plumose stridulating-bristles upon the coxa of the palp 
and of the first leg as in Citharoscelus. 
The stridulating-organ consists of a cluster of a dozen or 
more stout, mostly acuminate, plumose spines above the suture 
on the coxa of the first leg, and of some spinules rising from 
amongst plumose hairs upon the posterior side of the coxa 
of the palp. ‘The coxa, trochanter, and femur of palp are 
scopulate behind, those of the first leg scopulate in front; the 
femur of the second leg is also scopulate in front, those of the 
third and fourth scopulate behind. 
The protarsus of the first leg in the male closes against 
