Opistliophthalmiis in the British Museum. 217 



gular piece, tlio two grooves mentioned under 

 a being obsolete. 



'. Ocular tubercle just behind the middle of 

 tlie carapace ; penultimate segment of the 

 first three pairs of legs not spined exter- 

 nally ; vesicle granular Wa/Meiyi (^'i'lior.). 



. Ocular tubercle far behind the middle of the 

 carapace ; penultimate segment of legs of 

 Hi'st three pairs spiny externally. 

 rt'. Vesicle distinctly granular below (intor- 

 ocular area of carapace smooth, last ab- 

 dominal sternite weakly granular in $). . nitidiceps, sp. n. 

 h\ Vesicle smooth below, at most granular 

 quite at the base. 

 «". ( 2 .) Tail short, 3 or 3| times as long 

 as the carapace, which is about as long 

 as the first, second, and third caudal 

 segments ; hand of chela thicker, 

 heavier, and less hairy ; genital oper- 

 culum not divided. 

 iC. Last abdominal sternite roughened, 

 at least mesially, with irregular 

 granulation ; inferior surface of the 

 Brst caudal segment with roughened 

 keels. 

 «**. All the terga distinctly granular ; 

 interocular area finely so ; last 

 abdominal sternite granular 

 throughout ; colour darker, max- 

 illae of first and second legs deep 



black ptynax, Thor., 5 . 



h"*. Terga and interocular area entirely 

 smooth, or, at most, finely granu- 

 lar ; last sternite mesially rough- 

 ened; colour paler, maxillary 



processes not blackened [/lahrifrons, I'et., 5 , 



6''. Last abdominal sternite not granu- 

 lar, at most punctured; inferior 

 keels of first caudal segment smooth 

 (each marked with two punctures), 

 a". Interocular area rugose inferior 

 median keels of first caudal seg- 

 ment strong ; colour entirely 



blackish calvus, L. Koch, $ . 



b". Juterocular area polished, smootli ; 

 inferior median keels of first 

 caudal segment weak ; colour 



reddish brown lathiucmiSj C. Koch, 5 . 



i/". ( d" .) Tail from 4 to 4Himes the length 

 of the carapace ; hand much thinner 

 and more hairy, 

 a'". Sterna of abdomen smooth, the last, 

 at most, granular laterally. 

 a^^. Tail narrow, compressed; den- 

 ticles of upper keels on segments 



