Annals of the Transvaal Museum, 
41 
DESCRIPTION OF A NEW SPECIES OF HADOGENES AND OF 
THE MALE OF HADOGENES GUNNINGS PURC. 
By John Hewitt, B.A. (Cant.). 
HADOGENES GRACILIS, sp. nov. 
The scorpion here described was collected in April, 1910, for the 
Transvaal Museum by Mr. J. H. van Dam at De Kroon, Crocodile River, 
a station between the Pretoria and Rustenburg Districts. 
Its characters are as follows : — 
Female .- — Carapace very shallowly emarginate in front, about as broad 
as long, densely granular throughout, rather coarsely at the sides and just 
in front of the median eyes ; lateral eyes almost equal, the middle one 
distant about J-J of its diameter from the anterior eye and of its 
own diameter from the posterior eye (in one specimen there is on the left 
side only a small accessory eye between the middle and posterior eyes), 
superciliarj^ ridges of median eyes smooth. 
First tergite finely shagreened at the sides, the succeeding tergites 
smooth, but with some coarse pitting, the seventh tergite very finely 
shagreened. Seventh segment broader than long. Tail 4^ times the length 
of the cephalothorax, which is equal to the first caudal segment together 
with of the second. First caudal segment highest and widest 
posteriorly, the height exceeding the breadth, the superior keels practically 
smooth ; in succeeding segments superior keels are coarsely denticulate, 
and the terminal tooth is spiniform in segment 2, enlarged also in segment 
3. Lateral keels smooth, most definite in the anterior half of segment 1, in 
the succeeding segments gradually becoming suppressed and quite wanting 
in the fifth segment. Inferior keels coarsely but irregularly denticulate 
in segment 2, more strongly so in segment 5, which has 7 to 10 larger 
teeth in each keel ; nearly smooth in segments 1 and 3, irregularly 
roughened in segment 4. Yesicle slightly compressed, a little broader than 
the hind end of segment 5 ; very finely shagreened dorsally and ventrally, 
the upper side almost straight. 
Pectines usually with 18 or 19 teeth, but varying between 15 and 20. 
Fingers of pedipalps lobed. 
Colour, light brown mingled with olive green ; the legs all pale, almost 
yellowish, as also is the vesicle laterally. 
Male . — Resembles the female, excepting in that all the dorsal tergites 
are shagreened excepting on the pair of small oval depressions situated 
just behind the anterior raised borders of each segment. The last abdomi- 
nal tergite very slightly longer than broad, narrowed behind, but not 
semicircularly rounded. 
Tail 8| times the length of cephalothorax. 
The first five segments all laterally compressed and much elongated. 
Inferior keels of caudal segments irregularly roughened, but not 
denticulate in any segment. 
Yesicle rather coarsely shagreened. 
Pectines usually with 19 or 20 teeth, but sometimes only 18. 
