NOVTTATES ZOOLOGICAE XXIV. 1917. 339 



representing two distinct species, the description and not the figure decides to 

 which of the two species the name refers. 



Until we discover a Zygaena hke the figure of Duponchel, this latter will 

 I'emain doubtful ; but there can be no doubt to what insect Duponchel's descrip- 

 tion refers, and even Mr. Oberthiir acknowledges that he has specimens from 

 Sebdou, Khenchela, and Bainen which only differ from typical hilaris of Europe 

 by the red streak along the inner margin of the forewings, and thus agreeing 

 absolutely with Duponchel's description. I therefore am unable to foUow Mr. 

 Oberthiir's reasoning, and consider that his name bachaga must either be sunk as 

 an absolute synonym or else be used as an aberrational name only to designate the 

 specimens with very heavy black markings and pale rings round the dark spots. 



We have taken this insect in special abundance at Alger and Hammam 

 R'ihra, and we found that in the Alger series the specimens with heavy black 

 markings were much more abundant than in the Hammam R'ihra series. In 

 West Algeria it appears to be much rarer than in East Algeria, for I have only one 

 specimen from Oran ; and the only place we found it ourselves was on the Djebel 

 Mekter, and out of a series of 98 Zygacnas from there, 7 were algira and 91 

 marcouna. I brought back a large number of cocoons of this species to Tring, 

 and bred a fine series, as well as a large number of two or three species of 

 Hymenopterous and two of Dipterous parasites. 



15 Djebel Zaccar, above JNIiliana, June 1916, Faroult. 



7 Djebel Mekter, Ain Sefra, May 1913, E. H. and C. H. 

 1 Oran, ex coll. Grum-Grshimailo. 

 37 Environs d'Alger, March-^une 1907-1912, W. R., K. J., and Dr. Nissen. 

 1 ex larva (larva Alger, emerged Hammam R'ihra, May 1 908 ; aberration with 

 most of black patches coalescent). 



7 ex larva (larva Alger, emerged Marseille, June 1908). 

 13 ex larva (larva Alger, emerged Digne, June 1908). 



226 ex larva (larva Alger, emerged Tring, June— July 1912). 

 186 Hammam R'ihra, May 1908-1916, W. R., E. H., K. J., and Faroult. 

 51 Hammam Meskoutine, May 1914, W. R. and K. J. 



5 Phihppeville, Kuhhnann. 



1 Souk Ahras, April 1914, W. R. and K. J. 



1 Ain Draham, Tunisia, July 1911, Faroult. 



2 Mauretania, Stau dinger. 



3 larvae, Alger. 



6 cocoons, Alger. 



16 No. 1 Ichneumon ? , Alger (hatched Digne and Marseille). 

 46 No. 1 Ichneumon ? , Alger (hatched at Tring). 



3 No. 2 Ichneumon ? , Alger (hatched Digne and Marseille). 

 101 No. 2 Ichneumon ? , Alger (hatched at Tring). 

 3 No. 3 Ichneumon ? , Alger (hatched at Tring). 



1 Tachinid No. 1, Alger (hatched at Tring). 



8 Tachinid No. 2, Alger (hatched at Tring). 



2 Tachinid No 2, Alger (hatched Digne and Marseille). 



The Tring series consists of 562 specimens. The British Museum possesses 

 1 1 examples : 2 Algeria, Frey coll. ; 6 Algiers, Leech coU. ; 2 Crowley bequest ; 

 and 1 Bowring ex Linnean Society donation, 1863. 



