chamberlin: new spiders of the family aviculariidae. 37 



of these 3 additional very small spines or spine-like bristles. Patella 

 of leg III with about 15 curved, appressed spines on the anterior side 

 arranged in 3 longitudinal series; tibia as usual with a band of spines 

 on each side but with none strictly dorsal in position. Tibia of leg IV 

 unarmed excepting for two slender apical spines beneath; tarsus with 

 two pairs of spines on anterior side toward distal end and on inner side 

 with two spines also toward distal end. Claws of posterior legs 

 with 5 teeth in a single sinuous series, the next to the most proximal 

 of these being much the longest. The teeth on claws of anterior legs 

 are similar, or only 4 may be present on claws of leg I; the teeth are 

 similarly in a single series but this is more strongly sinuous and may 

 appear double. 



Female (type). Length 12 mm. 



Cephalothorax: length, 6 mm.; width, 5 mm. 



fem. tib. +pat. met. tar. total 



Leg I 4.3 mm. 5.1mm. 2.2 mm. 1.1mm. 12 7 mm. 



Leg II 3.8 4 1.8 13 10.9 



Leg III 3.4 3.2 2 1..5 10.1 



LeglV 4 5.1 3.1 1.8 14. 



Readily distinguished from the other species known by differences 

 in spining of the legs {e. g., in wholly lacking spines on tibia and meta- 

 tarsus of leg I). 



AVICULARIINAE. 



Cyrtopholis medius, sp. nov. 

 Plate 2, fig. 4-6. 



Type.— U. C. Z. 17. d". W. I.: St. Kitts, F. Lagois. 



Paratype.— M. C. Z. 17. d". W. I.: St. Kitts, F. Lagois. 

 March, 1879. 



Paratype.— M. C. Z. 18. 9. ^V. I.: St. Kitts, F. Lagois. 



Integument of cephalothorax, legs, and chelicerae chestnut. Pubes- 

 cence of these parts brown of a golden lustre and cinereous intermixed, 

 the latter being especially conspicuous on ventral surface of femora. 

 Bristles either wholly brown or with distal portion grey; bristles of 



