174 Annuls of the South African Museum. 



william Division, collected by Mr. E. Pattison, after whom I have 

 much pleasure in calling it. 



This scorpion belongs to the group comprising fossor, chaperi, 

 macer, and intermedius. The granulation on the sides of the 

 carapace is intermediate in coarseness between the fine granulation 

 of macer on the one hand and the extremely coarse granulation 

 of fossor, chaperi, and intermedius on the other. The new species 

 appears to be most nearly related to intermedius, and agrees closely 

 in most points with Kraepeliii's description of the latter. The 

 proportions and structure of the hand appear to be the same, the 

 hand being relatively much narrower in both species than in fossor, 

 chaperi, or macer. The main differences between them appear 

 to be (1) the sides of the carapace are much less coarsely granular 

 in pattisoni than in intcrnicdi/is, (2) the tail is relatively much 

 longer in pattisoni, its length being 5 times the breadth of the 

 hand in the female and 7f times in the male, while in intermedium 

 it is only 4 times in the female and 6 times in the male. The 

 anterior tergal segments in the female are smooth in the middle 

 in pattisoni but finely granular in intermedius, and the legs are 

 nearly black in pattisoni but yellow in intermedius. 



In the unusual length of the caudal segments 0. pattisoni closely 

 resembles 0. lonyicauda, although these two species do not appear 

 to be closely related. 



The following South African species of Opistkophthalmus are 

 unknown to me, at least in the adult stage : 



(1) 0. colcsboycitsls, Sim., Soc. Ent. Fr. (5), x., p. 388, 1880. 

 Colesberg, Cape Colony. Either identical with or closely related 

 to 0. austerus, Karsch. 



(2) 0. inter i ned ins, Kraep., Eevis. d. Skorp., ii., p. 89, 1894. 

 Cape Colony (no exact locality recorded). Closely related to fossor 

 and chaperi, differing from the former in having yellow legs and no 

 secondary keels on the hands, and from the latter in the possession 

 of well-developed, smooth, inferior, median keels on the first caudal 

 segment. The proportions of the hands are those of pattisoni, 

 Pure. 



(3) 0. nitidieeps, Pocock, Ann. Mag. N. H. (6), xvii., p. 243, 1896. 

 Port Elizabeth. The South African Museum possesses only a 

 single young specimen of this species (J. L. Dreye}. 



(4) 0. breciceps, Poc., ibid., p. 244. No locality known. Ee- 

 sembles 0. ylabrifrons, from which it differs in having all the 

 abdominal sternites, including the first, thickly and uniformly 



