BUTTERFLIES AND MOTHS. 



339 



Thais Cassandra (on April 24th, on the Pic du 

 Fenouillet), and Lyccena Boetica. 



Certain butterflies appear to migrate. I have 

 seen V. Cardui crossing the Nice valley steadily and 

 swiftly from dawn till dusk for several successive 

 days. They did not fly together, but separately, each 

 one hurrying along as if he wished to overtake those 

 in front. An enormous number must have passed. 

 They seemed to come from the south-west, and to 

 make for the hills ; but I could form no conjecture 

 about their origin or their destination. 



I give in the Appendix a list of the Butterflies 

 which occur in the Maritime Alps. My son has 

 taken all excepting those marked with M. Milliere's 

 name. The Moths are so numerous that even if I 

 knew them, I could not give a list. But I include the 

 beautiful little Burnets (Zygcenas) which fly by day, 

 and also some of the Sphinxes, on account of the great 

 interest which attaches to them. 



A useful book is Kirby's " Manual of European 

 Butterflies." 



Fig. 114. PAPILIO ALEXANOR. 



