DIPLOCENTEUS. 





Carapace with its anterior border deeply excised in the middle, with rounded frontal lobes ; three lateral eyes 



on each side ; ocular tubercle in advance of its middle, not sulcate. Mandible with penultimate tooth of 



movable finger some distance behind the terminal fang. Chelce robust, the fingers armed with a close-set 

 median series of teeth, with a lateral series on each side consisting of more scattered denticles, some of 

 which are enlarged. Tarsi armed beneath with two rows of spines. Tail with its fifth segment furnished 

 beneath posteriorly with a semicircular area bounded by a row of granules, a distinct tubercular tooth 

 beneath the aculeus. 

 Type _D. whiter, Gervais. 



Distribution. Texas, Mexico, West Indies, and Brazil. 



1. Diplocentrus whitei. (Tab. I. figg. 2, 2 a-f, 2 ; 3, 3 a-d, 6 .) 



Scorpio whitei, Gervais, Ins. Apt. iii. p. 63 (1844) \ 



Diplocentrus whitei, Karsch, Mittheil. Munch, ent. Ver. iii. p. 98 (1879) 2 ; Pocock, Journ. Linn. 



Soc, Zool. xxiv. p. 396 (1893) 3 ; Ann. & Mag. IS 

 Das Tierr., Scorpiones et Pedipalpi, p. 101 (1899) 



(7) i. p. 391 (1898) 4 ; Kraepelin, 



W 



MB 



6 



Mittheil. M 



ent. Ver. iii. p. 99 7 ; Zeitschr. Naturw. (3) v. p. 407 (1880) 8 . 



Focock) . 



Wiss. Anst. xi. p. 16 (1894) 9 ( 



2 . Colour of trunk dark brown or greenish-brown ; legs yellow-brown ; hands and vesicle reddish. Upper- 

 side of trunk smooth and polished, with only a few granules upon the edge of the frontal lobes and upon 

 the posterior border of the tergite laterally, the last tergite more granular at the sides, the granules 

 forming two weak crests. Carapace a little longer than the first and second caudal segments, considerably 

 longer than the fifth. Sterna smooth ; the last with four abbreviated, posteriorly converging, weakly 

 granular keels. Tail about three and a half times the length of the carapace ; the intercarpal spaces 

 smooth; superior and inferior lateral keels weak and weakly tubercular, becoming progressively weaker 

 from the first to the fourth; median lateral keel extending over the posterior half of the segment of the 

 second, complete on the first, represented by a few granules and punctures on the third ; the four inferior 

 keels strong and tubercular on segments 1-3, the median becoming progressively weaker on segments 1-3 

 and obsolete on the fourth, where they are represented by rows of punctures ; fifth segment with strong and 

 denticulated inferior keels, upper keels weakly tubercular ; vesicle smooth and punctured, granular only 

 quite at the base beneath ; the subaculear tooth pointed or rounded and lobate. Chelce mostly smooth 

 and polished ; crests on the humerus denticulated, the anterior strong and complete ; upperside and upper 

 crest of brachium smooth, its anterior surface finely granular ; hand smooth and polished, weakly crested 

 above, its inner edge denticulated, its inner surface with two weak denticulate crests, its width equal to 

 the length of the underhand ; movable finger considerably longer than carapace. Legs almost smooth 

 externally ; distal end of tarsus expanded and overlapping the base of the claws ; tarsus of fourth armed 

 beneath with 7 spines in front, 8 behind, the third with 5 and 7. Pectinal teeth 10-15. 



c? . Smaller than female. Carapace finely shagreened in parts, terga also finely shagreened and furnished with 

 a few coarse granules, especially along the posterior edge. Tail with inferior lateral keels on segments 1-3 

 parallel. Chelce with upperside of humerus flat and anterior crest strong ; brachium with reticulation 

 of ridges ; hand coarsely reticulated above, more finely below, furnished above with two crests, the 

 external strong and running almost to base of immovable finger ; area at base of immovable finger smooth, 

 punctured, not depressed and granular ; fingers curved as in female. Legs of third and fourth pairs with 

 some coarse granules. Pectinal teeth 14. 

 Measurements in mm. — § . Total length 65, carapace 9, tail 32. $ . Total length 53, carapace 7, tail 31. 



Hab. Noeth Amekica, Texas. — Mexico. 



■ 



No exact locality in Mexico has ever been assigned to specimens of this species, 



b2 



