Species of Opisthophthalmus. 141 



and smooth only on the convexities. The length of the carapace is 

 equal to that of the first two caudal segments taken together in the 

 adult male, and to these two segments together with ^ of the third 

 in the females and nearly adult males. The scape of the pectines 

 is free of teeth at the base for about ^ f of its length in the female, 

 and for i ^ of its length in the male (and not rectangular at the 

 base). The hurnerus and brachium of the adult male are longer 

 than in the female, but the hand is of about the same length, 

 although much narrower ; the upper side of the hand is nearly flat 

 in the adult male, and the finger-keel is very much more strongly 

 developed than in the female. The hand of the nearly adult male 

 resembles that of the female. 



OPISTHOPHTHALMUS CAKINATUS (Pet.). 



1861. Hcteroinetrus carinatus, Peters, Sitz. Ber. Beii. Akad., 1861, 

 p. 505 (I have not seen this work). 



1877. Opisthophthalmus anderssoni, Thorell, Atti, Soc. ital., xix., 

 p. 239, $ (teste Kraepelin). 



1877. OpisthQphthalmus histrio, Thorell, ibid., p. 242, $ juv. 



1879. Petrooicus carinatus, Karsch, Munch. Entom. Mitt., 1879, 

 p. 109 (quoted from Kraepelin). 



1887. Petrooicus furcatus, Simon, Ann. Soc. Ent. France (6) vii., 

 p. 380. 



1893. CEcopetrus carinatus, Pocock, Ann. Mag. Nat. Hist. (6) xi., 

 p. 307. 



1894. Opisthophthalmus carinatus, Kraepelin, Eevis. d. Skorp., ii., 

 p. 85. 



(a) 1 young and 2 ad. $ from Houmoed (Kenhardt Division) 

 and Naroep (Namaqualand Division), both in Great Bushmanland 

 (Max Scldechter] : No. of pect. teeth 19-20; length of carapace 

 in ad. $ 17^-19 mm. ; interocular area fusco-olivaceous like the 

 rest of the carapace ; :;: legs pale ochraceous. 



(b) 1 juv. ? from Jackalswater, half-way between Steinkopf 

 and Eamond's Drift, Namaqualand Division) (Max Schlechter). 

 This specimen, which is the smallest we possess, is 35 mm. long, 

 and agrees closely with 0. histrio, Thor., having the hands, the 

 upper edges of the fifth caudal segment, and the carapace smooth, 

 and the anterior margin of carapace not crenulated. The anterior fork 



* A type of coloration, as Pocock remarks, rare in this genus, and found by 

 him also in specimens of carinatus from Masliunalaiicl. 



