238 bulletin: museum of comparative zoology. 



tubercle, contiguous, subequal. Quadrangle of median eyes wider 

 behind than in front in the ratio 13: 11, and wider than long in the 

 same ratio or nearly so. Anterior row of eyes conspicuously pro- 

 curved; eyes subequal; median eyes two thirds their diameter, or 

 slightly more, apart and the same distance from the laterals, three 

 and a half times their diameter from lower margin of clypeus (male). 



Sternum with process between posterior coxae moderately wide, 

 the distal margin a little incurved. 



Tibia of male palpus with a stout, acutely pointed, subconical 

 process from dorsal surface near the proximal end. 



Length of male 2.2 mm. ; of female, 3 mm. 



Locality. — Huadquina, 5,000 feet, July. (Type, M. C. Z. 199, 

 male; para types M. C. Z. 200, one male, five females). 



ARGIOPIDAE. 



Tetragnatha tincochacae, sp. nov. 

 Plate 18, fig. 2, 3. 



Carapace and chelicerae yellowish, a black marginal line on each 

 side and a dusky median longitudinal stripe which widens and becomes 

 more diffuse upon the head. Sternum dusky brown or blackish. 

 Legs yellow, either unmarked or with femora and tibiae of anterior 

 pairs darker at distal ends and patellae also more or less darkened. 

 Ground color of abdomen silvery white as usual, overlaid with a net- 

 work of dark lines; venter with a median longitudinal brown stripe; 

 a narrow black stripe along each side expanded near its middle into a 

 larger spot; typically with a fine more or less broken longitudinal 

 black line on each side of dorsum just above the lateral stripe; dorsum 

 with a median longitudinal grey line giving off side branches as usual. 



Posterior row of eyes (in female) conspicuously recurved as usual; 

 median eyes twice their diameter apart, nearly same distance from the 

 laterals. Lateral eyes separated by about their diameter, their tu- 

 bercles touching at base. Area of median eyes wider behind than in 

 front in ratio 6:5; shorter than wide (5:6), the length equalling the 

 width at anterior end. Anterior row of eyes recurved; median eyes 

 equal to the posterior medians or scarcely smaller, once and a half 

 their diameter apart and twice their diameter or more from the 

 laterals. 



