CATALOGUE OF BUTTEEFLIES. 9 



second brood," W. Maling. ''Common, especially the August 

 and September broods; very plentiful in 1876," T. H. Hedworth. 

 " On the sea coast and in lanes," Chris. Eales. '' Finchale," L. 

 S. Brady. '* Common, Railway Banks, Hartlepool," J. E. E. 

 ''Upper Teesdale," F. A. Lees. 



POLYOMMATUS3 Bdv. 



9. Polyommalus Agestis (Hub. W. Y.). Beown Aegus. 



Polyommatus Agestis and Artaxerxes. Staint. Man., v. 1, p. 61. 



,, ,, Barrett's Lep. Brit. Is., vol. 1, p. 73. 



Lyccena Medon. Kewm. Brit. Butt., p. 123. 



,, ,, var. Salmacis, Steph., Kewm. Brit. 



Butt., p. 123, 126. DuEHAM Aegus. 



,, ,, var. Artaxerxes, Fab., JTewm. Brit. 



Butt., p. 123, 127. Scotch Aegus. 



,, Astrarche, Bgstr., South, Syn. List, Brit. Lep., p. 2. 

 Laeva. Buck., vol. 1, pi. xvi., fig. 1. 



Mr. "Wailes, in his Catalogue of the Lepidoptera of these 

 counties (p. 23-35), entered most fully into the history of this 

 pretty little species. His account of it is much too long to 

 quote at length, and in the present state of our knowledge it is 

 unnecessary to enter into a long discussion to prove what are 

 now established facts. The questions then were whether the 

 type and varieties were one, two, or three species, and what was 

 the plant on which the larva fed. 



The larvee of the Scotch form, Artaxerxes, was known to feed 

 on Helianthemum vulgare. That of the southern type had been 

 found on Erodium cicutarhim, which was also the recognized 

 food-plant on the continent, and this fact, along with the differ- 

 ence in their appearance, had caused writers to believe them to 

 be distinct. In 1831 Mr. Wailes gave Mr. Stephens specimens 

 from this district, which he described and figured ("Illust. 

 Haust." iii., p. 235) as a third species, Salmacis, and they were 

 from that time considered to be three species until Mr. Wailes 

 united them in 1877. I was fortunate enough to find larvae on 

 Helianthemum at Black Hall Rocks, from which the late Mr. 



