1892.] ARACHNIDA FROM ALGERIA AND TUNISIA. 25 



that they throw upon the synonymy of old-established but little- 

 known species. 



The only circumstance to be noticed here with respect to the 

 Arachnida is the vast amount of variation shown by the sexes and 

 young of the Scorpion, Prionurus australis. 



ARACHNIDA. 



The only species of this group obtained by Dr. Anderson are the 

 following: — Galeodes olivieri, Simon, Prionurus australis (Linn.), 

 Buthiis europcBus (Linn.), and Buthus leptochehjs (Ehrb.). All of 

 them are well-known N.- African forms, but I am not aware that 

 B. leptochelys has been ere this recorded so far to the West. 



Tlie species were obtained at the following localities : — Galeodes 

 olivieri between Biskra and Tuggurt ; Prionurus australis, Duirat, 

 Biskra, Tuggurt ; Butfivs europoius, Algiers, Hammam Meskoutiue, 

 Hammam R'irha ; Buthus leptochehjs, Biskra. 



CHILOPODA. 

 Fam. ScuTiGERiD^. 



SCUTIGERA COLEOPTRATA (Liuu.). 



Hammam R'irha and Algiers. 



Common in Madeira and in the southern parts of Europe. 



Fam. LiTHOBiiD^. 



LlTHOBIUS IMPRESSUS, C. Koch. 



Kherrata, Constantine, Tunis, Hammam R'irha, Algiers. 

 Originally described from Algeria, but abundant in many parts of 

 Italy. 



LlTHOBIUS CASTANEUS, Newport. 



Algiers, Hammam Meskoutiue, Hammam R'irha, Kherrata, Con- 

 stantine. 



This species was redescribed as eximius by Meinert ; see Pocock, 

 Ann. Mus. Genov. (2) ix. p. 63, 1890. It occurs also in S. Europe. 



Fam. SCOLOPENDRID^. 

 SCOLOPENDRA MORSITANS, LinU. 



The North-African form of the cosmopolitan S. morsitans was 

 described by Koch as S. scopoliatia and by Newport as S. algerina. 

 For the synonymy of 5. scopoliana see Pocock, Ann. Mag. Nat. Hist, 

 ser. 6, vii. pp. 51, 52. 



ScOLOPENDRA ORANIENSIS, LucaS. 



S. oraniensis, Lucas, Rev. Zool. 1846, p. 237; id. Expl. Sci. de 

 I'Alg., Anim. Art. p. 344. 



S. dalmatica, C. Koch, 1847, and other authors. 



Hammam R'irha, Tunis. 



At these localities Dr. Anderson obtained three examples of 



