chamberlin: the arachnida. 237 



tiguous, equal. Quadrangle of median eyes wider behind than in 

 front in the ratio 6:5, equal in length and breadth or scarcely longer. 

 Anterior row of eyes straight or but very slightly recurved; median 

 eyes smaller than the laterals (diameters about as 4:5), one fourth 

 their diameter apart, their radius from the laterals, two and a half 

 times their diameter from the lower margin of the clypeus. 



Sternum equal in length and width or slightly wider ; the intercoxal 

 caudal process narrow. 



Upper margin of furrow of chelicera typically with four teeth of 

 which the three nearest the claw are long and conical or with the one 

 nearest claw smaller, the fourth much smaller than others ; sometimes 

 only three teeth of which the one nearest claw may be bifid. 



Locality — Cuzco, 11,500 feet, July. (Type, M. C. Z. 197, female; 

 paratypes, M. C. Z. 198, two females). 



TuTAiBO,^ gen. nov. 



Cephalothorax short; broadly ovate; frons obtuse and moderately 

 wide. 



Posterior row of eyes substraight or weakly recurved; median eyes 

 farther apart than from the laterals, distinctly more than their diame- 

 ter apart. Anterior row of eyes decidedly procurved, its eyes sub- 

 equidistant. Area of median eyes wider thaij long and wider behind 

 than in front. 



Legs slender; anterior tarsi shorter than the metatarsi. 



Frons without special process in the male. 



Tibia of palpus in the male with a conspicuous dorsal spine. 



Genotype. — Tutaiho debilipes, sp. nov. 



TUTAIBO DEBILIPES,^ sp. nOV. 



Plate 17, fig. 9-10. 



Carapace and sternum black. Legs black or blackish brown, 

 somewhat paler distally. Abdomen entirely shining black. 



Posterior row of eyes slightly recurved; median eye a little more 

 than once and a half their diameter apart, only about their diameter 

 from the laterals. Lateral eyes on each side elevated on a common 



' Gosiute lutaibo, a negro. 

 ' debilis, feeble, pes, foot. 



