■408 Mr. R. I. Pocock on a neio Species of 



long spines and funiisliecl with a distinct tubercle externally ; 

 the tibia hairy beneath, but armed externally and internally 

 with about two rows of strong spines ; the tarsus similarly 

 armed, the claw with a large basal tooth, which is itself 

 also armed. The legs of the anterior pair armed like the 

 palpi, except that the inner surfaces of the femur and patella 

 are not armed with either spines or spiniforra hairs and the 

 anterior spines on the tibia are fewer. The second leg is, 

 like the first, stout, the spines on the tibia still more reduced, 

 those on the anterior surface becoming shorter and those on 

 the posterior surface setiform and fewer. In the third leg 

 there are a few small spines interspersed amongst the hairs on 

 the anterior aspect of the patella and on the anterior and 

 j)osterior aspects of the tibia ; a few, too, only remain upon the 

 proximal segment of the tarsus, which is, however, armed 

 beneath with two strong long spurs. In the fourth leg the 

 patella is armed with a few short spines in front and one 

 behind ; the tibia is furnished with setiform spines beneath 

 and the proximal tarsal segment with a few long spines 

 beneath. The claws of all the legs are armed with a large 

 basal tooth, behind which, except in the posterior claws of 

 the first and second leg, there is a second minute tooth. 



The ahdomen high and rounded. The anterior spinners 

 shorter than the basal segment of the posterior, which are 

 stout, three-jointed, and conical. 



Length of carapace 6'5 millim., width 6; length of abdo- 

 men 8, width 6 ; length of maxillipede 12"8, of first leg 15"2, 

 of second and third lo'8, of fourth 20. 



Of this interesting genus Pseudidiops, w-itii which Den- 

 dricon of Cambridge is synonymous, two species have been 

 described *, and these are very probably identical. 



Simon's original specimens were from Cayenne, and he 

 has subsequently obtained the species from Venezuela. Un- 

 fortunately his description is very brief and is not accom- 

 panied by figures ; so it is only possible to point out that this 

 form from Trinidad appears to differ from his opifex in having 

 the legs flavous and ringed with black. By the same 

 character it may be recognized from the British-Museum 

 example from Bahia, which Mr. Cambridge has described as 

 Dendricon rasiratum in the Proc. Zool. Soc. 1890, p. 623. 



* I'studidtops opifex, Simon, Ann. Soc. Ent. Fr. (6) ix. p. 215 (1889). 



Uendrico7i rastratuin, Cambiidge, l^roc. Zool. Soc. 1889, p. 2oO. 

 (The description oi Pseudidiops appeared on Sept. 11th, that of Den- 

 dricon on Oct. 1st. The former tiieivfore has the priority.) 



