AETHEOPOD FAUNA OF THE WEST INDIES. 40S 



whereas one of the characters that Simon gives for Mecocentrus 

 is the fact that the caudal segments are longer than wide. 



24. Beachistosteenus Eheenbeegii {Gervais). 



Scorpio Ehrenbergii, Gervais, Voyage de la Bonite, i. p. 282, pi. i. 

 figs. 18-22; id. Ins. Apt. lii. p. 69, d . 



Scorpio glaber, Gervais, Voyage de la Bonite, i, p. 285, pi. i. figs. 28-32 ; 

 id. Ins. Apt. iii. p. 69, 5 • 



Telegonus politus, L. Koch, Verh. z.-b. Wien, xvii. pp. 234, 235 (1867). 



$ . Colour ochraceous, the tergites infuscate, the aculeus of 

 the vesicle and the digits also infuscate. 



Carapace smooth above, closely and finely granular at the 

 sides, equalling in length the 5th caudal segment and the Isfe 

 + ^ of the 2nd. 



Tergites very finely granular, with a median depression, the 

 last much more coarsely granular, with a single granular keel. 

 Stemites perfectly smooth. 



Tail rather more than five times the length of the carapace, 

 narrowed posteriorly, the upper surface only shallowly excavated ; 

 the lower surface of segments 1-4 entirely smooth beneath, being 

 merely obsoletely subcariuate and symmetrically porous ; the 

 superior keels stronger, subgranular or crenulate, the granulation 

 decreasing posteriorly ; the 5th segment about twice as wide as 

 long, the superior edges not carinate, very lightly crenulate, the 

 upper surface entirely smooth, lightly depressed mesially, the 

 lower surface finely granular, the three inferior keels strong and 

 denticulate. Vesicle piriform, narrower than the 5th, a little 

 wider than high ; the aculeus long and very lightly curved. 



Palpi : humerus smooth or nearly so in the intercarinal spaces, 

 the keels granular ; hrachium smooth and not keeled posteriorly, 

 weakly granular in front ; manus round and smooth. 



Legs with femora externally very finely granular. 



Pectines with 32-33 teeth, overlapping the end of the coxas by 

 half the length of the distal sclerite of the shaft. 



<S o More closely and coarsely granular than the female ; the 

 sternites distinctly coriaceous ; the tail six times the length of 

 the carapace, which is as long as the 1st and ^ of the 2nd segment, 

 and also more robust than in the female, with two elongate pale 

 spots on the upper surface of the 5th segment. Hands of the 

 palpi more robust, with a conspicuous triangular tooth on its 

 inner surface in front. Pectines longer, reaching almost to the 

 extremity of the trochanter of the posterior legs. 



