206 THE ENTOMOLOGIST. 



beneath. In Satyrus, S. circe and S. briseis have the white bands 

 changed, but S. alcyone and S. semele are not affected. Erebia and 

 Pararge are alike unchanged. Ccenonympha hero, C. arcania (and 

 vars.), C. pamphilus, and C. davus have the cilia and under side 

 deeply suffused with yellow. Of the Hesperidse, Spilothyrus alcece, 

 Syrichthus alveolus, S. serratulce, and S. alveolus, all have the 

 whites changed to primrose, but Nisoniades, Hesperia, and 

 Carter ocephalus are not affected. 



With the Heterocera I have obtained but negative results, 

 although the number of species operated upon are to be counted 

 by hundreds. It would be unsafe to generalise with such scanty 

 data to go upon, but a few remarks may be ventured. The white 

 pigmentary deposits of Pieris and Melanargia, although to the 

 eye the same, must have a very different chemical constitution, 

 and at one time I thought the negative ammonia results would be 

 a good character of the Pieridse, in contradistinction to Melan- 

 argia, &c. ; but facts would not support this speculation, for 

 Leucophasia proved refractory, and the Satyridee gave results by 

 no means uniform. Many more experiments must be performed, 

 Nature must be thoughtfully questioned again and again before 

 we can possess a firm basis for speculation. 



Hitherto changes of colour only have been dealt with, and 

 few reagents employed, but by recent experiments on the solu- 

 bility of the various pigments in different media, most interesting 

 facts have been brought to light, which in the future I hope to 

 communicate. What a wonderful and lovely sight is the under 

 side of Vanessa atalanta ! It has at least a dozen shades of 

 colour, most exquisitely mingled. Some day these colours will 

 be analysed and their constitution made known. The results 

 herein recorded may then be of service. 



24, Fleming Eoad, Lorrimoi'e Square, S.E., Aug. 16, 1884. 



DESCRIPTION OF A NEW SPECIES OF JUNONIA. 

 By H. C. Lang, M.D., F.L.S. 



A few days since I noticed some specimens in the British 

 Museum Collection included in the series named Junonia orithya, 

 Linn., bearing the locality label " Turkey," and at once proceeded 



