CHAMBERLIN : THE ARACHNIDA. 241 



lateral direction at about one fourth length from anterior end; on 

 caudal half on each side a row of four moderately large dark dots. 

 Venter of abdomen with ground-color and network like dorsum but 

 darker; a narrow median longitudinal stripe solid grey, a darker line 

 along border of venter on each side. 



Posterior row of eyes strongly recurved; median eyes about two 

 and one fifth their diameter apart and about three times their diameter 

 from the laterals. Lateral eyes on each side separated by their diam- 

 eter, their tubercles distinct but contiguous at base or nearly so. 

 Anterior row of eyes recurved as usual; median eyes equal in size to 

 the posterior medians, one and a fifth their diameter apart and more 

 than three times their diameter from the laterals. Area of median 

 eyes much wider behind than in front, the ratio being 11:9, slightly 

 wider than long. 



Upper margin of furrow of chelicera in female with nine teeth; of 

 these the first and third from the fang are the largest and are separated 

 by a wide space in which the much smaller second tooth lies, (Plate 18, 

 fig. 4). Teeth of lower margin with nearly the same arrangement as 

 those of the upper. 



Abdomen long and slender, somewhat more than four times longer 

 than the greatest width, narrowly rounded caudad and gradually 

 widening cephalad; anterolateral corners subrectangular, not gibbous. 



Legs with few spines of which those on femora are shorter than the 

 diameter of the joint and those on the more distal joints are longer. 

 Hairs more numerous on distal joints, somewhat oblique, of moderate 

 length. 



Female. Length 11 mm. Length of cephalothorax 3 mm.; width, 

 1.9 mm, 



fem. tib.-f-pat. met. tar. total 



Leg I 8.1mm. 9.6 mm. 9.1mm. 2.1mm. 28.9 mm. 



Leg II 5.3 5.3 5 1.5 17.1 



Leg III 8.1 2.2 2.2 1 8.5 



Leg IV 5.6 5.6 5 1.3 17.5 



Tibia I, 8.8 mm. Tibia IV, 4.8 mm. 



Locality.— Sorontoy, 7,000 feet, September. (Type, M. C. Z. 205, 

 female). 



Tetragnatha sp. 

 Locality.— San Miguel, 6,000 feet, July. (M. C. Z. 328, immature). 



