( Iviii ) 



no trace of the odour. These observations were repeated 

 three days later with fresh specimens, both male and female, 

 and with the same result. 



^ '' In the course of last year (1903) I made several trials on 

 common species in conjunction with Dr. Longstaff. Besides 

 confirming previous results, we both detected a scent on the 

 fore-wings of Satyrus semele, which to me seemed somewhat 

 suggestive of chocolate. Dr. Longstaff has continued his 

 observations both at home and abroad, and will, I hope, on some 

 future occasion communicate his results to the Society. Last 

 year I also obtained distinct evidence that the scent in G. 

 raj)se, ^ , is confined to the scales of the upper surface. This 

 perfume has been compared by Mr. Image to that of sweet- 

 briar — which seems to me nearer the mark than my own 

 suggestion of mignonette. 



" During the present year I have been able to confirm Dr. 

 Longstaff's opinion that G. brassicse, ,$ , possesses a chai-acteristic 

 odour. It is not easily appreciated, but when once caught is 

 quite unmistakable. The best comparison I can make is with 

 the petals of a scarlet geranium. I have again made trials 

 with S. semele, c? , whose scent has a slight pungency which I 

 am now inclined to compare with that of sandalwood, though 

 there is a delicate flower-like fragrance at the back of it. 

 Trials were also made with Pararge megsera, <$ . The scent, 

 as in the case of S. semele, appeared to be confined to the scales 

 of the dark streak on the upper-side of the fore-wing. It was 

 a faint, but heavy, sweet odour, suggestive of chocolate cream. 

 It seemed to me to affect the back of the nose, even perhaps 

 the pharynx, and to leave a kind of aroma which was enhanced 

 by gentle expiration. Lycaena icarus, c? , was found to have a 

 faint scent also something like that of chocolate sweetmeats. 

 This confirmed a previous observation by Dr. Longstaff. I am 

 uncertain about Upine2)hele janira, (^ , but am inclined to think 

 that a slight odour is present. I find also a faint scent in the 

 scales of the upper surface of Gonejyteryx rhamni, S , which I 

 cannot describe further than by calling it ' flowery.' 



" There is, I think, absolutely no doubt that the scent of 

 the male butterflies examined is associated with the special 

 male scales, which are in some cases distributed more or less 



