SCORPIONIDEA. PEDIPALPI. 807 



number. Movable claw of chelicerae very seldom toothed and then very 

 weakly. Anterior end of prosomatic tergum not narrowed. The ridges 

 or low spines on the movable claw of the pedipalp in a row, with scattered 

 ones on one or on both sides of it. Stigmata often circular. Sternum 

 as a rule no longer than broad. Megacormus 1 Mexican species ; Euscor- 

 pius 4 Mediterranean species reach North to the Tyrol and East to the 

 Caucasus. The common 'Italian species is E. italicus. Belisarius 1 Pyrennean 

 species ; the following four genera are S. American, Chactas many doubtful 

 species ; Broteas 5 species ; Broteochactas 4 species ; Teuthraustes 3 species. 



Fam. 5. Vejovidae. An outer and inner tarsal spur. Three lateral 

 eyes. Sternum usually broader than long with a deep median furrow. 

 Last tarsal joint of legs with a median row of hairs or papillae. Stigmata 

 elongated. Median lamella of the pectines often moniliform. lurus 1 

 cosmopolitan species ; Scorpiops 4 species from the southern slopes of 

 the Himalayas ; Uroctonus 1 species from California ; the following three 

 genera are from southern North America, Anuroctonus 1 species ; Vejovis 

 8 species ; Hadrurus 1 species ; Hadruroides and Caraboctonus both with 

 1 Neotropical species. 



Fam. 6. Bothriuridae. The sternum consists of two narrow plates and 

 is very much broader than long, it is scarcely visible. The middle lamella 

 of the pectines is often moniliform. With the exception of Cercophonius 

 all the genera are Neotropical. Brachistosternus, 2 species ; Thestylus 1 

 species; Urophonius 2 species; Bothriurus 4 species ; Phoniocercus 1 species ; 

 Cercophonius Australian with 1 species ; Centromachetes 1 species. 



Order 2. PEDIPALPI * 



Arachnida with clawed non-chelate chelicerae and clawed or chelate 

 pedipalps. The abdomen (meso- and meta-soma) may be stalked but 

 is not universally so, it has eleven or twelve segments and sometimes 

 bears a post-anal multi-segmented tail as in the Palpigradi. 

 There are four lung-sacs. The anterior walking legs are much 

 elongated and act as feelers. 



The prosoma is usually covered by a single dorsal shield which 

 bears anteriorly two median eyes and two groups of three lateral 

 eyes, but some species are blind. Ventrally between the legs 

 are sternal pieces called the pro-, meso-, and meta-sterna. The 

 two pair of lung-books lie near the posterior border of the 

 second and third mesosomatic sterna. The chelicerae, which 

 have but two joints, are always provided with claws, and pro- 

 bably, as in the spiders, contain a poison-gland, since the bite of 

 these animals is much feared. The bases of the chelicerae can be 

 retracted into the cephalo thorax. The pedipalps, as the name 



* Kraepelin Scorpiones u. Pedipalpi, Das Tierreich, 8 Lff., 1899, M. 

 Laurie, J. Lin. Soc., London, xxv, 1894, p. 20. Bernard, Tr. Lin. Soc., 

 London (2), vi, 1894-97, p. 305. 



