236 bulletin: museum of comparative zoology. 



Oedothorax melacra/ sp. nov. 

 Plate 17, fig. 6, 7. 



Carapace and legs light brown or the latter somewhat more yellow- 

 ish, the former dusky anteriorly and along lateral edges. Sternum 

 black. Abdomen t;yT)ically pink, more rarely brown of only faint 

 pinkish tinge; tip of abdomen about bases of spinnerets black; 

 epigynum black. 



Posterior row of eyes straight; eyes equal in size; median eyes but 

 little more than their radius apart, three fourths their diameter from 

 the laterals. Lateral eyes contiguous, equal in size or the anterior, 

 but slightly larger. Anterior row of eyes straight or very slightly 

 recurved ; median eyes with diameter three fourths that of the laterals, 

 not fully their radius apart, two thirds their diameter from the laterals, 

 three times their diameter from the lower edge of clypeus. Area of 

 median eyes wider behind than in front in ratio 10: 7. 



Carapace of male smooth, without processes. 



Chelicera of male with a rather long, acute process or tooth near 

 middle of length on anterior side, this directed anteroventrad. 



Sternum with process between posterior coxae with sides convex, the 

 process widening a little distad of its middle and distally truncate. 



Tibia with two spines on outside at distal end on a common base. 



Locality.— Ciizco, 11,500 feet, July. (Type, M. C. Z. 195, male; 

 para types M. C. Z. 196, three females). 



Oedothorax orinus,^ sp. nov. 

 Plate 17, fig. 8. 



Carapace and legs light brown. Sternum dusky. Abdomen dark 

 grey; a median longitudinal black line; caudal portion with several 

 black che\Ton-marks of which the more anterior are crossed by the 

 median line. 



Carapace smooth, without teeth. 



Posterior row of eyes very slightly procurved; eyes subequal; 

 median eyes three fifths their diameter apart and the same distance, 

 or very nearly so, from the laterals. Lateral eyes on each side con- 



' tJii\ai black, ccKpa, tip. 

 2 opetvos, mountaineer. 



