476 Mr. White on new or little known Arachnida. 



line of short thick- set hairs ; the maxillae approximate by their 

 inner edge. 



Palpi slender, with the second joint curved, and rather longer than 

 the fourth and fifth, which are nearly equal ; the last joint seems 

 to end in a claw, and is rather hairy : in the male the fifth joint 

 is dilated on its under side ; at base there is a smooth, roundish, 

 globular process ; sternum longish heart-shaped, sides some- 

 what irregular. 



Cephalothorax of a long, slightly depressed oval shape, which is as 

 broad as the abdomen at base. 



Abdomen long (two-and-a-half times the length of the cephalo- 

 thorax), narrow, subcyhndrical ; at base somewhat swollen, the 

 swollen part overlapping the end of the cephalothorax ; at the end 

 it tapers abruptly, being roundish and slightly recurved : it is 

 covered with close and short hairs. 



Legs slender ; first pair the longest ; second as long, if not a little 

 longer than the fourth ; the third pair is very short, half the 

 length of the second ; one of the joints is somewhat swollen 

 and curved. 



Hab. Van Diemen's Land. R. Gunn, Esq. 



Walckenaer figures two species, argentea and zorilla, both with a 

 longish oval body. Gu^rin (Encycl. Mdth. x. sub voce) alludes to 

 two or three other species of this genus, from Africa and America, 

 and Koch describes two others in his ' Uebersicht,' (p. 5) ; but this 

 is, I believe, the first species described as coming from Van Diemen's 

 Land. As will be seen in the description, there are some characters 

 which would constitute it, at least, another section of Latreille's 

 genus, if not a subgenus. 



5. Eripus heteroff aster, Walck. Thomisus heterogaster, Latr. 

 Guerin, Iconogr. Arachn. pi. L fig. 4. 



" Evidently, by its structure and habits on the leaf of a tree, this 

 species is a Laterigrade ; it differs, however, most singularly from 

 that tribe, and is, I think, a new genus. 



" Anterior eyes red ; maxillae rounded, inclined ; mentum thinly 

 arrow-shaped ; chelicera powerful, with large aperture for 

 poison ; abdomen encrusted with five conical peaks ; thorax 

 with one small one ; crotchets to tarsi very strong. 

 ** Colour snow-white, except tarsi and half of leg bright yellow ; 

 the tops of the abdominal points and line of eyes black : it must, 

 I think, be new. Taken in the thick forests near Rio de Janeiro, 

 May 1 832." Darwin's MSS. 



Salticus (Homalattus*) pustulatus, n. s. 

 Upper side black, with greenish reflections. 



Eyes eight, on short elevations of thorax ; may be considered as 

 placed on three lines, two of which are approximate, the third 



* Homalattus, a new subgenus, now proposed for the first time ; the legs 

 are unfortunately destroyed. 



