1746 Me, v. 0. MCKARD OAMBEIDGB OM [Juue 16, 



Araignees sont assez differentes de celles des Avicularia ; tandis 

 que C6ux-ci sont assez lents, les Tapinauchenius courent avec une 

 excessive rapidite." — " Je les ai trouvcs sous des ecorces d'arbres 

 abattus dans les defrichements." 



This is very interesting, for the habit is evidently totally different 

 from those of the genus Santaremia described below, and gives 

 an additional warranty to the goodness of the generic distinction. 



In certain Spiders from the Amazons and Trinidad, which resemble 

 Tapinmichenius in the straightness of the anterior row of eyes, 

 the first pair of legs is longer than the fourth, the sternal sigilk 

 iii. and iv. are more removed from the margin, the legs of the iii. 

 and iv. pairs are more slender than those of the first two pairs, and 

 the legs are not clothed with long fringing hairs. On the ground 

 of these diiierenees 1 have formed a new genus for their reception, 

 including two species, Santaremia pococJci and S. longipes ; 

 Tapinauchenius will include T. sancii-vincenii ; while Avicularia 

 will include A. avicularia, A. walckenaeria, A. nUilans, &c. 



The following characters may be found useful in distinguishing 

 these three genera : — ■ 



A. Anterior row of eyes strongly proourved Avicularia, Lam. 



B. Anterior row of eyes straight or nearly so. 



1. First pair oflega equal to the fourth. Legs clothed 



with long hairs Tapinauchenius, Ansa. 



2. First pair of legs longer than the fourth. Legs 



clothed with short hairs Santaremia, n. g. 



Santaebmia, gen. nov. 

 Anterior row of eyes straight or nearly so. Legs of first pair longer 

 than those of fourth. Four pairs of sternal sigilla visible : 1st at base 

 of labial plate ; 2nd marginal ; 'drd submarginal ; 4th remote from 

 margin. Posterior pair of spinners not longer than width of sternum. 

 Carapace gibbous (in profile) behind the eyes. Patella and tibia iv. 

 shorter than carapace. Patella and tibia i. equal to or longer than 

 carapace. Legs clothed with short hairs. Protarsus and tarsi iii. 

 and iv. mucJi narroiver, less spatidiform than i. and iii. Habits 

 terrestrial, forming silk-lined burrows in the ground. 



Type. Santaremia pocooki ', n. sp., § . — Hah. Santarem. Type 

 specimen in coll. Brit. Mus. Nat. Hist. 1896. (Plate XXXIII. 

 figs. 8, 9, & 13; Plate XXXIV. fig. 20; and Plate XXXV. 

 fig. 12.) 



Colour. Carapace dark brown, clothed with short sandy yellow- 

 grey hairs, rufous towards and on posterior margin. ]3ase of 

 mandibles clothed with sandy and much darker brown hairs. 

 Abdomen rich chocolate-brown, with scattered rufous hairs, more 

 numerous towards spinners. Ventral area brown. Sternum, coxffi 



' I have great pleasure in connecting this species with the name of my friend 

 Mr. R. I. Pocock of the Nat. Hist. Museum. He had already named it in MS. 

 from specimens taken near Pari by Mr. Bates, but kindly withdrew his claim 

 to the species in my favour. 



