chamberlin: new spiders of the family aviculariidae. 39 



closer approximation of the eyes of the anterior row, somewhat in the 

 form of the palpal organ, the form of the processes of tibia I in the male, 

 the greater relative length of tibia I to metatarsus I, etc. It seems 

 also to be especially close to C. Jcmoralis Pocock, described from 

 Montserrat; but it diflers in having metatarsus I in the male bowed 

 dorsad instead of straight, in the less crassate femur of leg III, and in 

 having the scopula of tarsus III entire; the posterior lateral eyes are 

 relatively larger. 



Cyrtopholis portoricae, sp. nov. 

 Plate 2, fig. 7. 



Type — M. C. Z. 16. 9 . Porto Rico. 



Integument of cephalothorax and appendages chestnut. Pubes- 

 cence of carapace brown, with some of cinereous color intermixed 

 especially along the edges. The grey and brown hair intermixed on 

 legs as usual with the grey most abundant on ventral surface of femora 

 and coxae as well as much on sternum. The usual lighter stripes 

 above on legs showing especially on patellae and tibiae. Abdomen 

 with the large black spot on caudal half above as in related species. 

 Bristles of legs fewer and shorter than in the preceding species; brown, 

 in part paler distally; those of abdomen fewer and less conspicuous 

 than in C. incdius. 



Anterior row of eyes procurved in such degree that a line tangent 

 to anterior margins of the median eyes in dorsal view passes through 

 anterior third of lateral eyes. Anterior median eyes equal in diameter 

 to the longitudinal diameter of the laterals or slightly larger; their 

 radius or a little more apart. Posterior lateral eyes with longitudinal 

 diameter about two thirds that of the anterior laterals, more than 

 their radius from the latter. Anterior eyes with visual axis directed 

 less laterad than in C. viedius. 



Cephalothorax relatively narrower than in C. medius. 



Palpus when extended along side of leg I reaching to the end of 

 proximal third of metatarsus of the latter. 



Stridulating bristles of trochanter of palpus slender, acute, only 

 slightly clavate, near 30 in number; those on trochanter I 30 or more, 

 closely arranged, shaped like those of palpus. 



Female (type). Total length near 23 mm. 



Cephalothorax: length, 10.2 mm.; width, 8 mm. 



