from the hoicer Amazons etc. 91 



iurther apart, at least over one diameter 

 apart, at least two diameters from laterals, 



1. TiWse i. and ii. with 5— 5 spines beneath. 



Protarsi i. and ii. with o — 5 (or o — 6) 

 spines beneath. Central posterior eyes 

 two diameters from laterals. Size 



smaller, carapace 3 mm L. j^urpiij-eu^, Sim. 



la. The number of spines beneath tibise i. 

 and ii. not mentioned in the descrip- 

 tion, but are o in the figures L. monastoi'des, Cb. 



2. Tibiae i. and ii. with 4 — 4 spines beneath, 



Protarsi i. and ii. with 3 — 3 spines be- 

 neath. Central posteriors 3 diameters 

 from laterals. Size larger, carapace 

 5"5 mm L. alhidus, sp. n. 



Labdacus albidusj sp. n,, $ . 



ffah. Hio de Janeiro. 



Type in coll, Brit. Mus. Nat. Hist, London. 



Carapace 5'0 mm., abd. 10. 



Colour. Carapace, legs, and abdomen dull yellow-red, 

 clothed with short pure white pubescence. Legs furnished 

 with short fine black spines, their margins fringed with long 

 curving silky white hairs. 



Structure. Carapace with stride distinct ; anterior ocular 

 area (from anterior margin of posterior centrals to clypeus) 

 horizontal. Central anterior eyes If diameter apart, very 

 small. Clypeus narrow, 1^ diameter of anterior centrals. 

 Ocular quadrangle longer than broad, narrower in front. 

 Central posteriors l-g- diameter apart, 3 diameters from 

 laterals. Lateral anteriors very small, close in front of poste- 

 rior laterals. 



Legs. Tibiae i. and ii. with 4 — 4 spines beneath and 2 

 lateral spines ; protarsi i. and ii, with 3 — 3 spines beneath 

 and 2 or 3 laterals. 



Tarsal claws 3. 



The description of this fine species, the largest of the genus 

 hitherto discovered, is drawn from a dried specimen in the 

 Museum collection. It is closely allied to purpureus, Sim., 

 but differs in the number of subtibial spines and the position 

 of the eyes. I give a table of species according to the cha- 

 racters furnished by ]\L Simon, including alhidus and 

 monastoides^ for the benefit of those who may not have 

 Simon's paper at hand. 



Genus NiLUS, Cambr,, 1876. 



1876. Nths, Cambr. — The eye-formula and three tarsal 

 claws would seem to suggest ThalassiuSy Sim. 



