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ACAKTHOPHRTNUS.— EETEROPHKYNUS. 57 



cliela is armed basally with two spines, one superior and one inferior, in addition to those that stand upon 

 the upper and lower edges ; tibia of chela armed above with two long spines separated by a spinule, or a 

 spine which does not exceed one-fourth the length of either of them ; between the distal of these and the 

 extremity of the segment stand three spines, the median of which is longer than the others ; hand armed 

 above and below with a single long spine, the upper nearer the base of the hand than the corresponding 

 long spine in Phrynus and Hemi phrynus. Proximal tarsal segment of the legs entire, without transverse 

 membranous line. 



) A. spinifrons, Poc. 



Distribution. California and Mexico. 



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1. Acanthophrynus spinifrons* (Tab. XI. %g. 5, 5 a-e, <s .) 



Phrynopsis spinifrons, Pocock, Ann. & Mag. Nat. Hist. (6) xiv. p. 286 (1894) 1 . 



Colour a tolerably uniform reddish-brown, a distinct yellow ring round the apex of the femora of the legs. 

 Carapace studded with coarse granulation, which is more scattered on the cephalic area ; median ocular 

 tubercle at least twice its long diameter from the groove that marks the thickening of the anterior margin ; 

 subfrontal process lying far beneath the edge of the carapace and bluntly rounded. Chelce longish, 

 trochanter armed in front with five spines on its lower and distal edge, there being two close together 

 near the acutely angular pivot that articulates with the femur ; femur armed above and below as in Hemi- 

 phrynus raptator, the longest inferior spine equal to the height of the segment, and the longest superior 



spine a little less ; very 



tibia coarsely granular, 



with distinct inferior crest, the longest spine on its upper edge much exceeding the thickness of the 

 segment ; the spine between the two long spines minute and spinuliform, subequal to or smaller than 

 the proximal and distal spines, much smaller than the third spine from the proximal and the third 

 from the distal end ; hand with only a few granules above and below externally ; two spinules on the 

 area lying on the proximal side of the upper long spine; tibia of chela as long as the width of 

 the carapace. Femur of first ley more than twice as long as width of carapace, of fourth leg one- 

 fourth longer. 



Measurem ents 



) 



11-5 ; length of tibia of chela 16, thickness 3, length of its longest spine 4*5 ; femur of first leg 37, of 



fourth 20. 



Hab. Mexico, Ciudad in Durango l (Forrer) 



Subfam. HETEBOPHRYNINM 



Characters as above (p. 49). 



HETEROPHRYNUS 



Phrynus, C. Koch (nee Lamarck), Uebersicht Arachn. Syst. v. p. 80 (1850) (part.). 

 Admetus, C. Koch, loc. cit. p. 81 (1850) (part.). 



(nee Fabr.) 



tf< 



Heterophrynus , Pocock, Journ. Linn. Soc., Zool. xxiv. p. 527 (in note) (1894) ; Ann. & Mag. Nat 



p. 36 (1895). 



(1894) (type chir acanthus, Gerv.) 



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Admetus, Kraepelin (nee Koch, Simon), Das Tierr., Scorpiones et Pedipalpi, p. 245 (1899). 



£>ame characters as for the subfamily. 

 biol. CENTK.-AMEE., Arachn. Pedip. & Solif., October 1902. i 



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