76 XoviTATES ZooLonirAE XXIV. 1917. 



borders of the Mediterranean. Now that we are all agreed that raphani is not 

 a form of daplidice, it remains to be seen what the North African daplidice ought 

 to be called. Mv. Oberthiir rather begs the question by treating his own albidice 

 in Fasc. X. of the Etudes as a mere aberration because it occurs sporadically in 

 Spain, Italy, and South France. The matter cannot rest there ; whereas albidice 

 is only a rare aberration north of the Mediterranean, it occurs regularly in 

 considerable numbers south of the Mediterranean, and in the desert from Biskia 

 and Laghouat southwards by far the largest number of specimens are either 

 albidice or intermediates between that and the normal Mediterranean daplidice. 

 Staudinger in such cases got over the difficulty by prefixing the term var. et 

 ab. before the name of such forms, which in one district appeared as individual 

 aberrations and in others as a good local race. This we cannot do, as the " Inter- 

 national Rules of Nomenclature" decree thatlocal races must be named t rinomially , 

 while aberrati(3iml names must have the abbreviation ab. put before them. 

 As it is a fact that a large proportion of the Algerian daplidice really are always 

 albidice, I think it is quite clear that we must treat the Mauretanian daplidice 

 as a distinct subspecies under the name L. daplidice albidice (Oberth.). 



We personally have never met with it in any numbers north of the desert, 

 but Dr. Hartert found it very common from Touggourt to the south, and the 

 only place I s;;w it in fair numbers was at Berrian. At Tring the series from 

 Mauretania is 271. 



1 Tamarouth, Morocco, June 1904, W. Riggenbach. 



1 Mazagan, Morocco, August 1900, W. Riggenbach. 



2 Skiadma, Morocco, March 1905, W. Riggenbach. 



6 Mogador, Staudinger. 



2 Lalla Marnia, December 1914, Faroult. 

 8 Ain Sefra, May 1913, W. R. and E. H. 



3 Saida, May 1913, W. R. and E. H. 



3 Tifrit, May 1913, W. R. and E. H. 



4 Titen Yaya, June and August 1915, Rotrou. 



7 Oran, April 1913, W. R. and E. H. 



2 Environs d'Alger, May— June 1911, W. R. and E. H. 



69 Guelt-es-Stel, April— September 1912-1913, W. R. and K. J. and Faroult. 

 1 Hammam R'ihra, May 1916, Faroult. 

 4 Puits Baba, May 1913, Faroult. 



7 Berrian. April 1911, W. R. and E. H. 



41 Ghardaia, April— May 1911-1914, W. R., E. H., and C. H. 

 22 El Hadadra, May 1912, E. H. and C. H. 



3 El Arich, June 1912, E. H. and C. H. 



1 Bled-et-Amar, March 1912, E. H. and C. H. 



4 Djcbel Kerdada, May 1912, Faroult. 



3 Biskra, March— AprU 1911-1914, W. R., E. H., and C. H. 

 31 El Kaiitara, April— June 1908-1909, W. R. and E. H. and Cheh Brahim. 



6 Batna, April 1908-1914, W. R. and E. H. and Nelva. 

 19 Khenchela, May— June 1911-1912, W. R. and K. J. and Faroult. 



3 Cbnstantine, May 1908, W. R. and E. H. 



3 Djelfa, May 1913, Faroult. 



8 N. of Ain Guettara, April 1912, E. H. and C. H. 



