some South-American Aviculariid^. 83 



mandible there are a few stout but apicallj setiform spines on 

 the proximal side of the oral frmge. 



? . — Resembling the male, but with shorter limbs ; cara- 

 pace about as long as patella + tibia of third leg, shorter than 

 those of fourth bj about one fourth of the tibia. 



Measurements in millimetres. — ^ . Total length 35 ; cara- 

 pace 15"5 ; palpus 31 ; first leg 71, second leg 66, third leg 

 b^, fourth leg 68 (all from base of femur) ; protarsus of fourth 

 18, of first 15'5 ; patella + tibia of first 26, of fourth 23'5 ; 

 palpal organ 7. 



? . Total length 39 ; carapace 17 ; palpus 33 ; first leg 58, 

 second leg 55, tliird leg 47, fourth leg 57; patella + tibia of 

 first 22, of fourth 20' 5. 



Loc. N.W. Ecuador, Rio Sapayo, 450 feet (type) ; also 

 Carondelet, 60 feet. 



Both sexes of this species may be distinguished from thosa 

 of the Trinidad form P. Cambridgii, Poc, by having the 

 stridulating-spines on the palpus only about twelve in number, 

 short, of tolerable even thickness throughout, and not sepa- 

 rated from the oral fringe. In P. Gamhridgii the spines are 

 much more numerous, long, distally incrassate, and forming a 

 strongly curved series remote from the oral fringe. Again, the 

 male of P. ecclesiasticus has longer legs tlian that of P. Cim- 

 hridgii, the carapace in the latter being a little longer than 

 the tibia of the fourth leg, equal to its protarsus, longer than 

 the tibia of the second; the palpal organ is about one third 

 the length of the carapace and equal to the p:\tella of the palp. 



Psalmopoeus plantar is, sp. n. 



? . — Cohur (dry specimen). Carapace and upperside of 

 limbs covered with olive or greenish-yellow hairs; protarsi 

 and tarsi richer reddish brown, with a very distinct pale, 

 probably pinkish patch at the extremities ; a similar but 

 double patch at the extremity of the tibia; sternum, under- 

 side of abdomen and of palpus, and first two pairs of legs 

 velvety brown (probably black). 



Carapace a little shorter than patella + tibia of first leg, as 

 long as those of second, longer than protarsus + tarsus of first. 

 Anterior median eyes about three fourths of a diameter apart 

 and about half their own radius from the laterals. 



Legs hirsute, like those of Avicularia, not nearly so strongly 

 fringed as those of P. ecclesiasticus or P, Cambridgii ; the 

 scopulse very broad, that of protarsus of first as broad as long ; 

 anterior legs shorter; fourth leg a little longer than first, 



6* 



