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46 



PEDIPALPI. 



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Suborder UROTRICHA 







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Fam. THELYPHONIIXE 



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Same characters as for the suborder. 



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Distribution. Oriental Region from Jap 

 Western Pacific Islands in the south-* 













the north and India in the west to the 

 Sonoran and Neotropical Regions in 





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America 





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MASTIGOPROCTUS 



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Thelyphonus of authors up to 1894. 

 Mastigoproctus, Pocoek, Ann. & Mag. Nat 



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(1894) ; Kraepelin, Abh. Ver. 















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Hamb. xv. p. 36 (1897) ; Das Tierr., Scorpiones et Pedipalpi, p. 223 (1899) . 



Carapace with a crest running forwards on each side in front of the lateral eye-clusters ; median eyes separated 

 by a low ridge and looking obliquely upwards and outwards. Maxillary processes of chelce without tooth 

 on inner edge. Secondary sexual characters slightly developed ; chelae in male longer than in female, 

 with the spines on the trochanter modified and the tibial apophysis thinner. Pern ale with the segments 

 of the tarsus of the first leg unmodified and like those of the male. Sternum of first abdominal 

 segment with a pair of shallow depressions ; of second also with a pair of depressions and bearing a 



transverse crescentic crest immediately behind the generative orifice. In the male the sternum of the 







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first abdominal segment inflated laterally, the pits prolonged into a couple of oblique furrows; no median 

 sulcus ; second abdominal sternum without any median spine or crest, 

 i M. aiaanteus. Luc. 



Distribution. From Florida, Texas, and Arizona, southwards 



the West Indies 



(H 



Martinique), and through Central America 



South America as far 



the Argentine Republic 



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Synopsis of the Central-American Species. 



a. Upper and outer sides of all the segments of the chela smooth, 



polished, and sparsely punctured; tibia of second and third legs 

 without apical spur beneath 



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b. Upper and outer sides of all the segments of the chela densely rugose 



with granules and close-set punctures ; an inferior apical tibial spine 

 upon the second, third, and fourth legs . . 



a 1 . Outer side of femur and of proximal half of tibia of chela rugose, 



spines on the trochanter subequal in male ........ 



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ft 1 . Outer side of femur and proximal half of tibia of chela 



denticulate. 





liochirus, Poc. 



giganteus, Luc. 



giganteus (typical form) . 



a 2 . Spines on trochanter of chela in male much reduced, giganteus, subsp. mexicanus, Butl. 



b 2 . Anterior spine on trochanter in male very large 



giganteus, subsp. scabrosus, n. 





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