Mr. A. G. Butler on the Genus Gonyleptes. 115 



the palpi being unarmed. We have foiir examples from 

 Georg-ia, where the type also was taken ; they agree closely 

 with Say's clesci4ption, but not with Wood's. 



With regard to tlie species recently described from Ecuador 

 (Trans. Am. Phil. Soc. n. s. xiii. 1869, pp. 435-440, pi. xxiv.), 

 G. i)roedo^ G. injucundus, and G. sjnnqmlj^us appear to be 

 Goniosomata, and G. multimaculatus a mutilated and greasy 

 example of Cosmetus cordatus; the species [0. marginatus) 

 forming the new genus Octophthalmus is unknown to me at 

 present; 0. hilunata'^ and . ferox^ ioxmvag the genus Or- 

 tonia, are also unknown to me, although the latter appears to 

 be congeneric with Goniosoma ra2)tator of Gervais, which I 

 have always considered the type of a distinct genus. 



The following are new species : — 



17. Gonyleptes armillatus, n. sp. PI. III. figs. 1,2. 



Colom's : above pitchy, the marginal tubercles of cephalo- 

 thorax tawny in the centre ; tarsi ochraceous ; palpi olivaceous ; 

 below brownish in parts, the joints of the legs testaceous ; 

 mandibles or chelaj olivaceous, their pincers ferruginous. 



Male. Above with oculiferous tubercle prominent, arched 

 forwards, and obtusely bifurcate ; immediately behind it and 

 in front of the transverse suture two groups of five to six 

 minute tubercles ; central area of cephalothorax transversely 

 ovate, margined on either side by six gradually increasing 

 prominent tubercles, and in front of these to just above the 

 suture by a series of minute shining granules ; bearing on 

 either side a robust obtuse incurved spine above base of coxas 

 of hind legs ; distinctly convex and crossed by six to seven 

 transverse irregular series of moderate-sized tubercles, besides 

 six prominent central ones placed longitudinally in pairs ; 

 posterior area trisegmented, tuberculate, second segmentation 

 bearing a prominent terminal spine : legs short, coarsely rugose, 

 spinous, pilose ; hind legs with coxge obtusely spinous ; femora 

 coarsely tuberculate, externally obtusely dentate-spinous ; 

 tibiai coarsely tuberculate : sternal surface entirely tuberculate 

 and pilose, as also the segments of the abdomen ; palpi (" man- 

 dibules palpiformes " of Gervais) of moderate length, compressed, 

 with slender spines ; cheliceres short, pilose, the chela; cylin- 

 drical, pincers minutely serrated internally. 



* This species has quite the aspect of a Cosmetus, so far as one can 

 judge by the fig'ure; but the description says, "Palpi .... penulti- 

 mate joint broadly dilated, somewhat trianp-ular, thin, and armed -with 

 minute slender spines on its marp^ins, and a pair of larger ones on its distal 

 end ; the distal article more cylindrical, with one or more acute spines,, 

 against which the movable claw works." 



