CAPTURES AND FIKI-D RKPORTS, 85 



thermore, out and away the best lithium results were obtained 

 with the orange wing of G. cleopatra, which had also afforded so 

 fine a cyanide-reaction ; for, in this instance, in the course of 

 some two or three weeks' exposure, the whole mass of the lithium 

 sulphate was found to be dyed purple-pink. It is noticeable that 

 this reaction is more marked with orange species, e.g.. Terms 

 nicippe, G. edasa, G. cleopatra (fore wing, male), than with the 

 merely yellow ; clearly the natural orange is one stage nearer to 

 this artificial purple-pink* than are the yellows. This entirely 

 accords with the views already expressed as to the genealogy of 

 these colours. 



It was thought interesting to determine whether the same re- 

 action could be obtained with other salts of lithium, and accord- 

 ingly a few experiments were made with the chloride. This was 

 found, however, to be, physically, so unsuitable a reagent, that it 

 was quickly abandoned. It is proposed, however, to further 

 investigate this subject by experimenting with other lithium 

 compounds. 



These lithium results gave a new aspect to this work, and, 

 indeed, seemed at first only to confuse such notions as one had 

 previously formed. Before hazarding any opinion on the pheno- 

 menon, it was clearly necessary to determine whether this reaction 

 were confined to the lithium salts, or whether it would be obtained 

 from others also. This led to several of the experiments with 

 sodium salts, and while it was found, as previously stated, that the 

 majority of them were without any action, in one case there was 

 a positive result ; for sodium arsenate, tested with G. cleopatra, 

 showed a very faint pink tinge. The pink was very faint, it is 

 true, and, although noticed within seven days from the com- 

 mencement of the experiment, it was found no more marked after 

 a further exposure of two weeks. With the exceptions, therefore, 

 of sodic arsenate and lithium sulphate, no other alkaline salts 

 have been found to give this purple-pink reaction. 



(To be concluded.) 



CAPTURES AND FIELD EEPORTS. 



CoLrAS EDusA IN NOVEMBER. — Not having seen any record of Colias 

 edusa in November, I thought it might be of interest to state that I cap- 

 tured my last specimen on Nov. 3rd, at Littlehampton. It was a small 

 male, and in fine condition, I should think having emerged that day. — 

 Percy J. Lathy; Bexley Heath, Jan. '26, 1893. 



Cnethooampa pityocampa, Schiff. — I saw some nests of the larvae of 

 this destructive species yesterday, near a place called Saint-Pancrace, about 



* The colour was exceedingly like that of an alkaline solution of phenol- 

 phthalein. 



ENTOM. — MARCH, 1893. I 



