Classification of Scorpions. 311 
Sternum reduced to a transverse anteriorly angularly con- 
vex and posteriorly concave sclerite, transversely but scarcely 
longitudinally impressed, wedged in between the genital oper- 
culum and the ingrown coxe of the appendages of the fourth 
pair. 
Genital operculum large. 
Pectines moderately or very long, with clearly defined 
fulcra and intermediate lamelle. 
Appendages.—The penultimate tooth on the movable digit 
of the cheliceree very short; the digits of the chele not angu- 
larly notched; the denticles arranged in three series—an 
external and internal, consisting of larger separated teeth, and 
a median, consisting of a single or double, rarely (Cerco- 
phonius) a multiple series of smaller teeth. 
Feet with two pedal spurs (rarely the posterior obsolete, 
Phoniocercus) ; the lower surface furnished with more or 
fewer lateral spines and a median series of hairs or spicules. 
Tail mostly powerful, its keels largely obsolete, with no 
spine beneath the aculeus. 
d (?in all genera) with a tooth on the inner surface of the 
hand; digits not lobate. 
? with cleft genital operculum. 
Genera: Bothriurus, Peters; Brachistosternus, Pocock ; 
Cercophonius, Peters; Mecocentrus, Karsch ; Phonio- 
x: 
cercus, Pocock ; Thestylus, Simon; T¢mogenes, Simon ; 
Urophonius, Pocock. 
Distribution. S. Neotropical, Australia, Sumatra. 
The scorpions of this group seem to be little more than an 
exaggeration of some of the American members of the Lurini, 
for some of them show many points of resemblance to Cara- 
boctonus and LHadrurus. 
Family Buthide, Simon. 
Feet furnished with two pedal spurs, the anterior of which 
is often double. 
Sternum small, triangular or pentagonal. 
Ocular tubercle in front of the middle of the carapace ; 3 to 
5 lateral eyes on each side. 
The movable digit of the chelicerze with the penultimate 
fang subequal to the terminal; its inferior edge armed with 
teeth ; the lower edge of the immovable also generally armed. 
The hands of the palpi are rounded and the digits long. 
d. With the tail and palpi usually longer and thinner or 
