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SCOKPICWES. 

























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The above-given description and the figures on Tab. I. have been taken from an adult 

 male and female, captured with many others at San Diego, Texas, by Mr. William 















The only other example in the British Museum is the type of the species, which is 

 dried and too imperfect to be available for description. It is ticketed " Mexico." 



D. mexicanus, Peters, is cited as a synonym of D. whitei on Kraepelin's authority. 









2. Diplocentrus keyserlingi. (Tab. I. figg. 4, 4 a-c, <y .) 



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Diplocentrus keyserlingii, Karsch, SB. Ges. nat. Fr. Berlin, 1880, p. 57 l ; 



Scorpiones et Pedipalpi, p. 102 (1899) 2 . 



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Diplocentrus rectimanus, Pocock, Ann. & Mag. Nat. Hist. (7) i. p. 390 (1898) 



in, Das Tierr., 









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c? . Colour as in D. whitei. The whole of the upperside of the trunk finety and closely granular, with coarse 

 granules or tubercles on the frontal lobes of the carapace. Tail as in the preceding species, but the sides of the 

 first to the fourth segments con vexly rounded when viewed from above, and the inferior lateral crests strongly 

 converging posteriorly. Chelce with upperside of femur lightly convex and with weaker anterior crest ; 

 hand coarsely sculptured above, with network of ridges and two strong parallel keels, running from but 

 not reaching the base of the immovable finger ; area at base of this finger hollowed and granular ; fingers 

 much straighter than in D. whitei. Tarsi of fourth leg armed beneath with 6 spines behind and 6 in front. 











































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Peciinal teeth 9-10. 

 Measurements in mm. — Total length 55, carapace 6, tail 30. 









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Ilab. Mexico, Jalapa, Oaxaca. 





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The above-given description and 



the figures on Tab. I. have been taken from the 

 type of D. rectimanus, which, according to Kraepelin, is synonymous with D. keyserlingi, 









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Karsch, Only the male is known. 









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Pam. ViEJOVID^l. 









Synopsis of the Genera. 



a. Caudal segments 1-4 either keelless or furnished with a pair of 



parallel inferior keels. 

 a 1 . A large spike-like tooth present upon the lower border of the 



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movable finger of the mandible • ••'••.« 



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b\ Lower border of movable finger of mandible either to@thless or 



armed with a few small subequal teeth. 





Hadrurus, Thorell. 







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a\ Intermediate lamellae of the pectines broken up into numerous 



subequal subsimilar sclerites, of which about eight in the 

 distal half of the organ are spherical and like the fulcra, which 













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are large and round ; no teeth on inferior edge of movable 

 finger of mandible ; stigmata long and slit-like . . . . . 



V^ejovis, C. Koch. 





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b 2 . Intermediate lamellae of the pectines not broken up into sub- 



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equal subspherical selerites, or when broken up in this manner 

 only about six in number, and then the movable finger of the 









mandible is furnished with a row of five teeth below, and the 

 stigmata are short and suboval ; fulcra of pectines not large, 

 triangular. 











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