84 Mr. R. I. Pocock on Neotropical Scorpions. 
smooth and not (or scarcely) carinate 
beneath; the fourth scarcely keeled, 
being at most weakly granular. 
a‘, The body, limbs, and tail densely and 
closely punctured; with a large 
tooth at the base of the immovable 
digit and no tooth on the brachium. amazonicus, Sim 
6‘. The trunk, limbs, and tail not densely 
punctured; with at most a small 
tooth on the immovable digit. 
a’, The fourth caudal segment granular 
beneath; the brachium with a 
large anterior tooth. 
a®, Vesicle smooth above and below; 
tailishorter! iy. ete cee te chrysopus, sp. 0. 
b°. Vesicle granular above and be- 
low; tail longer. ....5 s.cs-- Karschit, nom. noy. 
b° The anterior four caudal segments 
entirely smooth and polished be- 
neath ; the brachium withat most 
a small tooth. 
a’, The upper caudal keels very 
distinct and granular; the 
spaces between them also 
granular; the last tergite 
laterally distinctly granular ; 
hand not keeled .......... Keyserlingit, sp. n. 
6", The upper caudal keels weak, 
and at most weakly granular ; 
the last tergite also smoother. 
a®, Thehand keeled; the supe- 
rior caudal keels a little 
stronger and feebly granu- 
Nett gs site, Ceca ee ae lepturus, Thor. 
6°. The hand not keeled in 9, 
scarcely so in the ¢ ; the 
superior edges of the ante- 
rior caudal segmentssmooth 
and rounded. .csgsn nie» Van Benedenti, Gerv. 
Chactas Van Benedenii, Gervais. 
Chactas Van Benedeniw, Gervais, Arch. Mus. iv. p. 282, pl. xii. figs. 40, 
41. 
The British Museum has two examples of this species, both 
of which were obtained in Colombia by Mons. Goudot ; both 
are from Ibaque and both bear tickets, affixed either by 
Gervais or Goudot, upon which the specific names are written. 
One example is a male and shows the extraordinary elon- 
gation of the palpi that Gervais has figured. The hand-back 
is longer than the movable digit and is more than twice as 
long as the width of the hand. In the female the palpi are 
much shorter and more robust. The carapace is minutely 
