of Opisthopltthcilmtis. 155 



and constitute Var. & The specimens in the collection are as 

 follows : 



A. Principal Form. Eyes far back, their distance from anterior 

 median edge of carapace 2f 3 times their distance from posterior 

 edge. Ventral surface of abdominal and of anterior caudal segments 

 in male furnished with exceedingly minute granules, although appa- 

 rently smooth to the naked eye. North of the Orange Eiver. 



1 ad. $ (type) and 2 ad. $ , probably from Warmbad (W. Palgravc) : 

 No. of pect. teeth in 5 24, in 3 24 ; length of carapace in J 22 mm., 

 in $ 21^-22 mm. 



B. Var. ft Eyes farther forward, their distance from the anterior 

 median edge of carapace only 2-24; times their distance from posterior 

 edge. Ventral surface of abdominal and anterior caudal segments 

 perfectly smooth in $ (except at extreme lateral borders of sterna, 

 which are minutely granular, as in principal form). Colour of trunk 

 and cauda olive-green to olive-brown, of interocular area and hands 

 yellow, of legs pale ochraceous. Young wholly dark (with the 

 exception of the legs). 



(a) 13 $ (4 ad.) and 6 $ (i ad.) from Namies on the border between 

 Namaqualand and Kenhardt Div., Great Bushnianland (Max 

 Schlechtcr) : No. of pect. teeth in $ 19-22, in $ 22-27; length of 

 carapace in ad. 2 20i 21-J mm., in ad. $ 20f mm.; length of 

 largest ? 156 mm., of $ 140 mm. 



(b) 2 J (1 ad.) from Naroep, Great Bushnianland, Namaqualand 

 Div. (Max Schlechtcr) : No. of pect. teeth 20-22 ; length of carapace 

 in ad. 5 22 mm. ; total length 160 mm. 



(c) 2 juv. $ and 1 juv. 3 from Jackalswater (half-way between 

 Steinkopf and Henkries), Namaqualand Div. (Max Schlechtcr) : 

 No. of pect. teeth in 5 23-24, in $ 29. The largest female specimen 

 is nearly full grown (length 115 mm.), and may be easily identified 

 from the type specimen of 0. yigas. 



OPISTHOPHTHALMUS AUSTERUS, Karsch, 



Mittheil. Munch. Ent. Ver., 1879, p. 128; Kraepelin, Bevis. d. 



Skorp., ii., p. 94, 1894. 



Area of Distribution. Western part of the Great Karroo (Wor- 

 cester Div.), Sutherland (?). 



(a) 11 $ (6 ad.) and 2 $ (1 ad.) from Touws Eiver Station, 



alt. 2,500 ft., Worcester Div. (F. Pnrccll) : No. of pect. teeth in 



$ 15-18, in $ 21-23 ; length of carapace in ad. ? ll^-12f mm. 



and only slightly exceeding that of first two caudal segments, in 



