Chamberlin.— PSEUDOS(;oRPiONs from chile and sumatra 189 



the following for muía: (4-18) 4,^4, 4, 6, 6, 6, 6, 6, 6. Palpi 

 oí the usual shape; tactile setae of hand and fingers geue- 

 rically typical (Fig. 20, 1); fiixed fiíiger with teeth distinct, 

 closeset and sharp (Fig. 20, J); movable finger with teeth 

 smaller and lesstooth-like, butstillclose-setand contiguous 

 (Fig. 20, H). Legs generically typical; chaetotaxy apparen- 

 tly showiu nothing distinctive. Coxae as sh.o^yn in Fig. 1 . F.; 

 intercoxal tubercle absent; raaxillae with median lyriform 

 ñssure straight and rather oscure iu the present specimen 

 (this is a family character); coxal spines found en coxae of 

 second pair oí legs only and consisting of four (possibly 

 five) plumose spines (Fig. 20, F. & G.) Ventral chaetotaxy 

 expressable by the following formula: (2-ñ), (3-5); (4-lV), 

 (4), (5) (Op.-4-6, 10), 8, 8, 6, 6, 6, 6, 6, 6. 



Éemars and explanations. — ^It is not possible in our 

 present state of knowledge to discuss the true affiuities 

 of this species. It may be easily distiuguished from all 

 other South American species by means of the above key. 



Since the chaetotaxal formulas used in the above des- 

 cription are here utilized for the first it is necessary that 

 some explanation be given. The dorsal chaetotaxy is as 

 foUows. The figures in the parentheses refer to the cara- 

 pace and each of the succeediug figures to the tergites 

 taken in order of their relative position to te carapace. 

 The first figure in the carapacal formula refers to the 

 number of setae found along the anterior margin, while 

 the second figure refers to the total number of macroche- 

 tae. The tergal numbers simply give the total number of 

 macrochetae found on each tergite. Iu thisgenus these are 

 always very definite and arranged in more or less even 

 longitudinal rows. In the case of the ventral chaetotaxy, 

 the figures in parentheses refer to the setae of the coxae, 

 startiug with the coxae of the pedipalps or the maxillae. 

 The first figure refers to the most anterior group of setae 

 ou the coxae in question while the second figure refers to 

 the total number. The román numeráis always refer to 

 the curious coxal spines which are present in almost all 

 merabers of this family. In seme species they are found 

 on more than one pair of coxae. The numbers for the ster- 

 nites are interpreted iu the same way as for the tergi- 

 tes. In the case of the genital operculum (designated by 



