chamberlin: new spiders of the family aviculariidae. 63 



Phormictopus platus/ sp. nov, 



rz/pf.— M. C. Z. 85. 9. Florida: Tortugas. J. B. Holder. 



Parati/pe.— M. C.Z. 84. 9. Florida: Tortugas. J. B. Holder. 



Integument of cephalothorax and legs when dry black or nearly so, 

 a weak reddish tinge becoming evident when in alcohol; that of 

 endutes beneath pinkish. Pubescence brown with a lesser amount of 

 grey intermixed. Bristles as usual. 



Eye-tubercle high and convex. Anterior row in dorsal view nearly 

 straight; a line tangent to anterior edges of median eyes passes 

 through anterior fourth of the laterals. Anterior median eyes equal 

 in diameter to the lateral ones; their radius or slightly more apart, 

 closer to the lateral eyes. Posterior lateral eyes slightly smaller than 

 the anterior laterals from which they are removed by a distance equal 

 to their radius. Posterior median eyes closer to the lateral eyes than 

 to the anterior medians situated much as in P. canccrides. A line 

 tangent to caudal edges of the two posterior eyes on each side passes 

 much behind anterior median eye of the opposite side. 



Plumose hairs on femur I more slender and relatively longer and 

 more prone in habit than in P. cuhensis; fewer in number and with 

 simple hairs intermixed. 



Female (type). — Length, 52 mm. 



Cephalothorax: length, 22.5 mm.; width, 20.2 mm. 



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



Leg I 16 mm. 22.7 mm. 13.2 mm. 7.3 mm. 59.2 mm. 



Leg II 15.6 21 13 7 56.6 



Leg III 14.3 19 13.7 6.7 53.7 



Leg IV 17 22.5 17.2 7.3 64 



A second female from the Tortugas, probably the same species 

 differs in having proportionately smaller legs with the cephalothorax 

 somewhat exceeding in length tibia + patella I and tibia + patella 

 IV; its anterior row of eyes is a little more procurved and the posterior 

 median eyes are a little farther forward; but these differences are 

 probably due to individual variation. 



This species is like P. cuhensis and P. cautus in having plumose 

 hairs on the femur of leg I ; but these hairs are fewer and more slender 

 than in P. cuhensis and do not form so dense a scopula, not extending 



1 xXarfc, broad. 



