chamberlin: the arachnida. 



253 



Epigynum with scape short; broad at base but narrowed to a 

 slender tip projecting caudoventrad, (Plate 19, fig. 6). 



Female. Length, 6.7 mm. Length of cephalothorax, 2.9 mm.; 

 width, 2.3 mm. 



Localities.— OWa^ntSiytamho, 9,000 feet, July. (Type, M. C. Z. 

 231, female; paratype, M. C. Z. 232, female). Urubamba, 9,500 

 feet, July. (M. C. Z. 233, female). 



Aranea plesia,^ sp. nov. 

 Plate 19, fig. 5. 



Carapace deep chestnut or blackish, paler along middle part of 

 head. Sternum black. Legs light brownish yellow, the joints an- 

 nulate with dark about distal ends, the tibiae of anterior pairs also 

 with a subbasal and narrow basal band. Abdomen with median 

 portion of venter black, the black area limited on each side by a nar- 

 row yellow longitudinal stripe ; lower portion of side black, the rest of 

 sides and the dorsum paler, whitish yellow covered with a close net- 

 work of fine dark lines ; back of middle of length a row of short, solid 

 black, transverse spots or lines each side of the middle, the anterior 

 of these bordered in front with white, on anterior portion of dorsum 

 two curving white lines meeting at an angle on the median line, the 

 figure thus formed having its edges lined with black. 



Posterior row of eye conspicuously recurved; median eyes their 

 diameter apart and between two and a half and three times their 

 diameter from the laterals. Lateral eyes subcontiguous and slightly 

 elevated together as usual. Anterior row of eyes straight or slightly 

 recurved; median eyes equal in diameter to posterior medians, 

 nearly one and three sevenths their diameter apart and about the 

 same distance from the laterals or but slightly more. Area of median 

 eyes wider in front than behind (11: 10), nearly equal in length and 

 breadth. 



1 TrXTjffios, close to. 



