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 

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

 young of the Scorpion, Prionurus austrdlis. 



ARACHNIDA. 



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

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

 Buthus europceus (Linn.), and Buihus leptochelys (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. 



The species were obtained at the following localities : — Galeodes 

 olivieri between Biskra and Tuggurt ; Prionurus australis, Duirat, 

 Biskra, Tuggurt ; Buthus europceus, Algiers, Hammam Meskoutine, 

 Hanimam R'irha ; Buthus leptochelys, Biskra. 



CHILOPODA. 



Fam. ScuTiGERiD^. 



SCUTIGERA COLEOPTRATA (Linn.). 



Hammam R'irha and Algiers. 



Common in Madeira and in the southern parts of Europe. 



Fam. LiTHOBiiDiE. 



LiTHOBIUS IMPRESSUS, C. Koch. 



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

 Originally described from Algeria, but abundant in many parts of 

 Italy. 



LiTHOBIUS CASTANEUS, NcWport. 



Algiers, Hammam Meskoutine, 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. ScOLOPENDRIDiE. 

 SCOLOPENDRA MORSITANS, Linn. 



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

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

 For the synonymy of S. 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 

 r Alg., Anim. Art. p. 344. 



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



Hammam R'irha, Tunis. 



At these localities Dr. Anderson obtained three examples of 



