and Spectes of Scorpions. 321 
dacus described below as planimanus reveals the same fact 
with respect to the flatness of the hand. 
Urodacus abruptus, Pocock. 
Urodacus abruptus, Pocock, Ann. Mag. Nat. Hist. (6) ii. p. 174. 
Urodacus Keyserlingii, id. op. cit. vill. pp. 244, 245. 
This species is smaller than U. nove-hollandie, smoother, 
with more elevated superior caudal crests, a relatively stouter 
hand with weaker keels upon it. Moreover, the frontal lobes 
are rounder, separated by a deeper excision, and the ocular 
tubercle is shorter and better defined in front and behind. 
This species seems to be common in 8. and 8.K. Australia. 
The type of the species (a dried specimen) came from Ade- 
Jaide; but since it was described I have seen others in the 
Museum of Owens College, Manchester, which are ticketed 
Mt. Lofty, 8. Australia, and Victoria. 
One from the latter locality is a male, the sex which has 
not been hitherto described. It has 16-17 pectinal teeth, 
with a carapace measuring 6 and a tail 32 millim., the total 
length being 55 millim. "A female from the same locality, 
measuring 6 63 millim., has the carapace 7°3 and the tail 31, 
and only 11 pectinal teeth; the genital operculum is very 
large, more than a semicircle, and longer than the sternum. 
This same form of genital operculum is shown in the types 
of U. Keyserlingti, a species which I now regard as identical 
with abruptus. In the male above referred to the superior 
caudal keels are elevated almost to the same extent as in 
U. armatus. 
Urodacus planimanus, sp. n. 
(Pl. XIV. fic. 7; Pl. XV. B. figs. 1, 1a.) 
Colour Here Sbieeaeeoa legs, vesicle, chelicere, and 
lower surface paler. 
Carapace a little shorter than the first two caudal segments, 
its anterior border deeply and abruptly mesially excised, the 
lateral eyes not prominent; the halves of the ocular tubercle 
terminating behind the eyes; the area between the median 
and lateral eyes polished and finely punctured; the rest of 
the surface finely granular. 
Tergites finely granular, the last with two granular keels 
on each side. 
Sternites smooth, polished, the last marked with two sub- 
crenulate keels and very finely, closely granular posteriorly. 
Tail four times as long as the carapace; posteriorly nar- 
rowed, compressed, slender, with finely granular intercarinal 
spaces, the keels finely denticulate; the upper keels of the 
