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24 



SCOEPIONES. 



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hich are said to be less than 50 mm. loner and to have the subaculear tooth represented 



_- _ _ n j i "i 



by a small tubercle 



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It is probable that C. elegans and C. limpidus represent distinct subspecific for 



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the 



same species, and no doubt many 





more 



be brought to light with 



diligent collecting in other localities 



In addition to the two already disc 







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the following may, I think, be recog 





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Subsp. insularis, nov. 



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Resembling the forms identified above as C. elegans and C. limpidus in colour, size, and structural features, 

 but without any trace of marbled variation on the legs, chelae, chelicerse, or underside of the tail, as in 





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Eab. Mexico, Tres Marias 



(Forrer) 



















Three specimens 



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Subsp. nigrovariatus. { 



Centrums niarovariat 





male and two females 



i 



figg. 4, 4 a, <j .) 



*/< 



(7) 



1. 



p. 387 (1898) 7 





(1899) 



8 



Kraepelin, Das Tierr., Seorpiones et Pedipalpi, p. 90 



<S . Resembling male of form referred to C. elegans in colour and most structural features, but differing in the 

 formation of the posterior segments of the tail, the fifth segment being wider than the first, with its upper 



surface much elevated in the middle, with a deep median groove expanding posteriorly into an oval 

 depression. 



Measurements in mm.— Total length 52, carapace 4-5, tail 33 ; width of its first segment 2-3, of its fifth 2-7 • 

 height of latter 2*5. ' 



Eab. Mexico, Oaxaca 



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Subsp. pallidiceps, nov. 



2 . A pale form, with the chelae, legs, and tail without trace of infuscation, and the carapace without stripes, 

 only the ocular tubercle and the lateral border being infuscate; the spots on the terga faint. Further 





differing from 0. elegans in having a relatively large and triangular subaculear tooth 

 teeth 19. 



Pectinal 



Measurements in mm. — Total length 54, carapace 5-5, tail 33 



■Hah. Mexico, Presidio (Forrer). 

 One specimen. 



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3. Centrums vittatus 



(Tab. VI. figg. 1, 1 a, b, $ 



ifamatus, C. Koch, Die Arachn. xi. p. 46, fig. 873 (1845) 



(1830)] 



(1821) 2 [nee Buthus vittatus, Guerin 



(Atreus) calif or nicus , Girard, in Marcy's Rep. Red River, p. 269 (1853) 



lif amicus, Wood 



Wood 



v. p. 363 (1863) 5 [nee Scorpio carolinianus, 



(1821) 



? Centrums olivaceus, Thorell, Atti Soe. Ital. Sci. Nat. xix. p. 145 (1877) ».. 



Eab. North America *, Georgia \ Florida 2 , Kansas % Texas 5 , California 



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