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



the palpi being unarmed. We have four examples from 

 (k'orgia, where' the type also was taken; they agree closely 

 ■with Say's description, but not with Wood's. 



With regard to the species recently described from Ecuador 

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

 G. proido, G. ■iujucundus, and G. sjnnijjalpus appear to be 

 Gomosomata, and G. multimaculatus a mutilated and gi-easy 

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

 forming the new genus Octoiyhthalmus is unknown to me at 

 present; 0. hilunata'^ and O.^/eroa?, forming the genus Or- 

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

 be congeneric with Goniosoma raptator of Gervais, which I 

 have always considered the type of a distinct genus. 



The following are new species : — 



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



Colours : 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 chela3 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 iDase of coxaj 

 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 ])rominent terminal spine : legs short, coarsely rugose, 

 spinous, pihDse ; hind legs with coxa; obtusely spinous ; femora 

 coarsely tuberculate, externally obtusely dentate-spinous ; 

 tiblaj coarsely tuberculate : sternal surface entirely tuberculate 

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

 dibules])alpiformes" of Gervais) of moderate length, compressed, 

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

 drical, pincers minutely serrated internally. 



* Tliis species lias quite the aspect of a Cosmcfm, so far as one can 

 judfje by the figure; but the description says, "Palpi .... penulti- 

 mnU' joint broadly dilated, somewhat triim;4'ular, thin, and arnu>d Avitli 

 minute slender spines on its marpns, 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." 



ft* 



