^fOV^TATES ZOOLOGICAE XXIV. 1917. 95 



make out any differences. If Mr. Elwes placed my two drawers of erythromelas 

 next to a drawer full of typical polychloros he would at first sight consider them 

 more distinct from polychloros than is xanthomelas , which everyone acknowledges 

 is a distinct species, for the deep fulvous red colour in erythromelas is in striking 

 contrast to the often dirty fulvous yellow of polychloros. 



As, however, occasional yellower specimens occur in Mauretania (about 1 

 in 350 specimens), we cannot treat erythromelas as anything but a very distinct 

 subspecies = local race. We never found this insect very plentiful anywhere 

 ill a perfect state, though the larvae here and there were very abundant, and 

 in consequence there are only 7 in the Tring Museum captured by ourselves. 



1 Fenson, Morocco, April 1903, W. Riggenbach. 

 1 Sebdou, June 1888, Austant (type of erythromelas). 

 1 Magenta, Prov. Oran, June 1915, Rotrou. 



6 Environs d'Alger, May— June 1911-1912, W. R., E. H., and K. J., and 

 Captain Holl. 



3 Blida les Glacieres, June 1908, W. R. and K. J. 

 1 Hammam R'ihra, May 1908, W. R. and K. J. 



194 Environs de Batna, Nelva and Taillefer. 



4 Khenchela, July 1911, Faroult. 



1 El Kantara, March 1911, Madame Faroult. 



1 Djebel Taya, February 1911, W. R. and E. H. 

 16 Grand Kabylie, July 1909, Dr. Nissen. 



4 Leila Kredidja, August 1907, Dr. Nissen. 



1 Ain Draham, Tunisia, July 1911, Faroult. 



4 Djebel Zaccar, above Miliana, June 1916, Faroult. 



The Tring series comprises 238 specimens. 



The El Kantara specimen, which I saw alive directly after Madame Faroult 

 caught it at the foot of the Djebel Metlili, is, I believe, the most southern speci- 

 men hitherto captured. 



The British Museum has 2 Mauretania, Grum-Grshimailo coll. ex Elwea 

 coll. ; 1 Alger, Lieutenant Mathieu ex Elwes coll. 



31. Polygonia c. album (Linn.). 



Papilio c. album Linnaeus, Syst. Nat. edit. x. vol. i. p. 477. No. 115 (1758) (Sweden). 



We have only seen this insect once in Algeria ; and although Dr. Nissan 

 maintains that it is fairly common round Alger, I feel sure it is not nearly as 

 common as it has been considered to be, or else Mr. Oberthiir and I would have 

 been able to have procured more than fourteen specimens between us in forty 

 years. 



1 Environs d'Alger, March 1912, W. R. and K. J. 



2 Djebel Zaccar above Miliana, July — August 1916, Faroult. 

 1 Hammam R'ihra, May J 916, Faroult. 



1 Ain Draham, Tunisia, Faroult. 



There are no specimens of this species in the British Museum from Maure- 

 tania. Mr. Meade- Waldo in his article records it as follows : Tizi Gourza, 

 July 1901. 



