SCORPIONS AND UiLIED ANNUIjATKD SPIDERS OK THE ANGLO-EGYPTIAN SUDAN 191 



Of nearly two hundred known species, only very few have been found in the Sudan. 

 Their extreme quickness, nocturnal habits, and the difficulty of ascertaining their hiding- 

 places, result in the smaller species especially being rare in collections. Indeed, many of 

 them have been described from hut a few specimens, or a single one, and from only one 

 sex. The only species of which I have personal knowledge is (Julcodei! nrahf, which is the 

 largest and commonest of them all, and is found not infrequently in Khartoum. No 

 exact locality is known for most of the other species, but three at least are certainly found 

 in the Sudan, the others only indicated as from "Nubia" or "Borders of Red Sea." 



The families of Sulifiu/m represented in the Sudan may be distinguished as follows : — 

 O'aleoilidn', 



Stigmata of second and third abdominal segment covered by a plate finely denticulated 

 at its posterior margin. Tarsus of maxillary palp articulated with metatarsus. Claws of 

 limbs hairy in the adult. Ocular prominence only with two seta? at anterior margin, second 

 and third leg, with two, fourth leg with three, tarsal joints, besides the metatarsus. 

 Solpugidie 



Stigmata of second and third abdominal segment free, or covered by lateral folds ; 

 tarsus of maxillary palp immovably connected with metatarsus ; claws of limbs naked ; two 

 or more setae at anterior margin of ocular prominence ; number of tarsal joints very 

 variable. 



In the tlalcodidie we have three genera to distinguish ; — 

 Galeodes 



First leg with two small curved terminal claws; pedicle of malleoli, mostly longer 

 tluin plate. 



I'arMjaleodcs 



First leg without terminal claws ; pedicle of malleoli mostly shorter than plate. 

 Othoes 



First leg without terminal claws; claws of second, third and fourth pairs of legs very long. 



In the tiolpiiijida; we may distinguish one genera probably occurring in the Sudan : — 

 Rliatjudes 



Terminal (tenth) abdominal segment very large, foi-ming part of back ; anal opening 

 perfectly ventral, horizontal; ventral maiidil)ular finger with a single basal tooth, preceded 

 by very small teeth. 



The three remaining genera liavo the following points in common : 



Terminal (tenth) abdominal segment circular or elliptic, not protruding much from 

 the preceding segment ; anal opening vertical, in the middle of abdominal segment, 

 Ventral mandibular finger, at least in the female, nearly always with two principal teeth. 

 Solj) u(ja 



Second and third leg with foui', fourth h^g with six or seven tarsal joints, besides the 

 metatarsus (ocular prominence with numerous fine setae at anterior margin ; metatarsus 

 of maxillary palp not spinous ventrally in both sexes). 

 Baesia 



Second and third leg witli two, fourth leg with four tarsal joints (metatarsus of 

 maxillary palp ventrally only spinous, without cylindrical setae). 

 GluvlopsU 



All legs with a single tarsal joint, that of fourth leg elongate ; ocular prominence, 

 with two ])rincipal setae at antei'ior margin, and some smaller ones. 



