318 ME. C. J. WITH ON SOUTH-AMEEICiN CHELIFEEIN^ 



margins, of which the former is a little longer, gradually merge into each other ; the 

 coxc^ are scarcely widened out towards the extremity. 



Legs (PI. XXXI. figs. 34 c-e). — The hairs are moderately long and stiff, not quite 

 simple ; long, slender, completely simple hairs are placed dorsally at the tip of the femur, 

 somewhat beyond the middle in the tibia, and one-fourth removed from the base in the 

 tarsus, the latter at least as long as the distance to the end. The legs are moderately 

 long and slender ; the tibia of the first pair of legs is 1-3 as long as the tarsus, which 

 is five times as long as deep ; t\\e femur of the fourth pair of legs is 2-8 as long as deep, 

 1-1 as long as tibia, and 1-7 lower than tarsus long. The claws show a remarkable 

 structure ; the posterior claw of the first pair is distinctly curved and pointed, but just 

 beyond the middle is widened out to a large, somewhat rounded, and triangular 

 process or tooth (fig, ^id); the anterior claw of the first pair, as well as both claws 

 of the fourth pair, has a similar median, but somewhat posteriorly placed tooth 

 (figs. 34 c 8ce). 



Colour. — Palps and head reddish brown ; the thorax is lighter brown and the tergal 

 sclerites are yellowish brown. 



Measurements. — Cephalothorax 1-38 (1-15); abdomen 2-75 (I'lO) mm. 

 Palps: trochanter 0-690 (0-483) ; femur 1-265(0-570); tibia 1-380 (0-610); hand 

 1-449 (0-851), depth 1-173 ; finger 1-150 mm. 



Leg I.: femur 0-897 (0-299), trochantin 0-155 (0-322); tibia 0-775(0-195); tarsus 

 0-574 (0-116) mm. 



Leg IV.: femur I -196 (0-425); tibia 1-081 (0-230); tarsus 0713 (0-161) mm. 

 Material. — Of this species I have examined a single male from the Amazons ; it 

 has previously been recorded from Matto Grosso and Surinam. 



Remarks. — The described form differs from Balzan's description by smaller size, by 

 slightly different shape of galea [cf. lo. fig. 2 a), by the less produced posterior surface 

 of the trochanter, and by the different proportions of the joints of the palps ; the most 

 important of these differences, namely that found in the very wide hand of the palps, 

 which is much wider than the finger is long, is easily explained by the fact that he has 

 measured the hand not in a true dorsal but in a partly lateral view. From Ellingsen's 

 description it differs in points of even smaller importance ; and consequently I regard 

 the identification of the male from the Amazons with those from Matto Grosso and 

 Surinam as beyond doubt. 



This species shows in the very important character found in the claws of the legs 

 similarity to the following species, but I nevertheless think that it is more nearly 

 related to Ch. nodulimanus Tom. and allied species on account of the large galea, 

 the structure of the head, and striking similarities in all the joints of the palps as 

 well as in the legs. A rather remarkable dissimilarity is found in the structure of 

 the tibia, if EUingsen is right in the statement that its conical protuberance is equally 

 well developed in the female and the male {cf. 15. p. 167). 



