1S4 SCORPIONS AND ALLIED ANNULATED SPIDEliy OF THE ANGLO-EGYPTIAN SUDAN 



First two dorsal plates of the abdomen with five keels, the lateral ones oblique, the 

 outer ones directed obliquely backwards and outwards ; all keels granulate. Movable 

 finger twice as long as hind-hand ... B. (B.) quuiqitestriatus, Hemprich and Ehrenberg 



5. Supraciliary ridges distinctly granular ; number of comb-teeth less than twenty ; 

 small species (30-46 mm.) ... ... ... ... B. (Bnthus) acutecarinatus, 'E. Simon 



Supraciliary ridges entire, at least in front of the eyes ; number of comb-teeth more 

 than twenty ; larger species (48-67 mm.) ... ... ... B. (Hottentotta) minax, L. Koch 



BiUluit: (rrioiinrns) amoreuxi, Savigny (Plate XIV., fig. 3; Fig. 22) 



Bu//iKS Savigny, T. C, Dr.ia-ijilion dc VEgi/ptc, Ed. 2, 1827, Vol. 23, p. 411 ; Atlas PI. 8, tigs. 2, 2 n., 2 Z. 



amoreuxi (Scorpio amoreuxi) 



Hemprich and Ehrenberg, T''erh. naturf., Fr. Berlin, I., B. 29, p. 35G ; Stiiah. Phys. Zool. II., 1829; Aruclinoidea, 

 Scorpiones, No. 6, tab. II., fig. 2a-f. (Aiidroctouiis [Priunurii^] citritius) 



Pocock, R. T., Journ. Linn. Soc. Zool., Vol. 25, 1895, p. 306 (Prionurus citrinus) 

 Biriila, A., IhiU. Acml. Imp. Si:, St. Peter.ihoiny, XIX., No. 3, p. 110 (Piithvii riiiiorni.ri); Sitz. Bi-r. Al:ml. 



IViss., Win,, CXVII., 1908, p. 134 (Ihitliiis [I'riumi i;is] i,,i,n,rn.ri) 



This entirely yellow scorpion is the largest of all Sudanese Bnthiis, and reaches nearly 

 125 mm. iu total length. The strong, raised upper keels of the thick cauda and the 

 relatively thicker hands distinguish this species from all other Biitlnis of the country. 



It is a strictly desert form, like its larger western congener B. (P.) australis, L. Its 

 distribution is restricted to the Nile Valley, from Cairo to Wady Haifa. I know of it 

 from no other locality in the Sudan than this latter one, where it is not uncommon. As 

 this species is nearly related to the North-West African B. autttralifi, which is said to be the 

 most dangerous of all scorpions, causing sometimes even the death of man, it is possible 

 that the Sudanese species may be equally venomous. 



Biithns (Biithus) quinquestriat'us, Hemprich and Ehrenberg (Plate XIV., figs. 1, 2; Fig. 23) 

 Buthiis Savigny, T. C, Description de I'Egypte, Vol. 22, 1827, p. 710; Atlas, PI. 8, tig. 1 (Scorpio oecilaniis) 



Hemprich and Ehrenberg, Verh. naturf., Fr. Berlin, I., 1829, p. 353 (Androctoniis \^Leiurus\ b-slriatus) ; 

 Si/mh. Phitft., Ziml., II.; Arachuoidea, Scorpiones, 1829, No. 1, tali. 1, tigs. a-f. (.Iiulroctonus [Lriiiru.'i'] 



quinqucstriattis aculeatus) 



Birula, A., Sit~. Bcr. Akcul. IViss., Wi.cn, CXVII., 1908, p. 124 

 This is b}' far the commonest scorpion of the Central Sudan, and is frequently met 

 with in Khartoum gardens under stones and logs. The Sudanese specimens are, at least 

 in adult specimens, distinguished from those from Egypt by the coloration of the fifth 

 caudal segment, which is not dark, as in the Egyptian specimens, but yellowish, like that 

 of the whole aniiiiiil. The cephalothorax is sometimes, but apparently not frequently in 

 Sudanese specimens, shaded with black, and the back of the abdomen is indistinctly 

 trilineate in this case. Supraciliary ridge granular in front, as well as all the other 

 keels of the abdomen and the cauda. Lower lateral keels of fifth caudal segment witli 

 larger, somewhat triangular prominences towards their hinder end. Tibia of maxillary 

 palp, with two granular keels above, about as broad as the hand. 



This species is distributed all over eastern North Africa (Egypt, Sinai, Borders of 

 Eed Sea, Syria; doubtfully also in Algeria, where I have never found it). It reaches a 

 length of 95 mm., but all the Sudanese specimens of my own collections are smaller. 

 I have collected it at Wady Haifa, Khartoum, and in the desert near Gebel Araschkol, 

 west of El Dueim, but not southward of this point. Captain Flower collected the 

 species on the Blue Nile. 



ijutnques 

 triatits 



