213 



41 (40) Cubitus subprismatic, with tlie anterior and superior sides plain; 

 anterior side subrectangulat^ limited both above and below by a very 



distinct dentate or granulate margin. 



42 (45) Anterior margin of cephalothorax rather broadly and deeply 



emarginate, its frontal lobes rounded. 



43 (44) Inner margin of the hands strongly compressed, thin. Dorsal 



eyes situated a little behind the centre of cephalothorax . Pandinus. 



44 (43) Inner margin of the bands very thick, not compressed. Dorsal 

 eyes situated a little in front of the centre of cephalothorax. 



Palnmnaeua. 



45 (42) Anterior margin of cephalothorax rather slightly emarginate in 

 tlie middle; frontal lobes broadly truncate MiaepTionus. 



46 (39) Dorsal eyes situated about double as far from the anterior margin 



of cephalothorax as from its posterior margin. The sixth joint of tlie 

 tail destitute of rows of granules and of distinct grooves on the under 

 side. Labial lobes of second pair of legs together a little broader 

 than (not more than half as broad again as) sternum. Oputthophthalmus. 



47 (38) Lateral eyes, at least the anterior one, situated very near to or on 



the lateral margin of cephalothorax. Hand-back forming an obtuse 

 or nearly right angle with the upper side of the hand. 



48 (51) Tail not much compressed; its superior margins not keeled. 



49 (50) The elevated lateral margin of cephalothorax visible under the 

 lateral eyes; these eyes, therefore, separated from the margin by a 

 slight interval. Hands not much flattened .... Opist.hacant?ius. 



50 (49) Lateral eyes situated on the very margin of cephalothorax. 

 Hands very flat Hormwus. 



51 (48) Tail rather strongly compressed, with keels both on the upper 

 and under side Ischnurus. 1 



52 (33) Two principal lateral eyes on each side. 2 



53 (54) " Tail with only three keels on the under side, thick, its keels 

 strong." Urodacus. 



54 (53) The first four joints of the tail with four keels on the under side. 



55 (56) Sternum narrower than the labial lobes of the second pair of legs 



together Broteas' 



56 (55) Sternum as broad as the labial lobes of the second pair of legs 

 together. 



1 The plnce of Hemiscorpius is probably in the vicinity of this genus. It is charac- 

 terized by Peters in the following words : — "Sternum as broad as the labial lobes of 

 the second pair. Frontal margin scarcely emarginate. Body and extremities flattened. 

 Tail slender, long, higher than broad, keeled, its sixth joint with two lateral tubercles 

 (in the males) behind the base of the short sting. The hind lateral eye somewhat 

 smaller, placed more inwards." If the tubercles mentioned by Peters also exi^t in the 

 females, Hemiscorpius is without doubt a g 1 genus. 



= 'there is sometimes an accessory eye on one or both sides of cephalothorax, or the 

 hind lateral eye is divided into two. 



