A CHAPTER ON ZYGvENA MINOS. 53 



twice as broad as the cilia of the hind wings, and is continued, 

 though very narrowly, as far as the third branch of the 

 median nervure. In two males of var. «, from the south of 

 Europe, it is at the apex more than three times as broad as 

 the cilia, and the continuation along the hind margin is broad 

 in proportion. 



The favourite localities here ai-e open places amongst birch 

 and fir wood, where flowers are numerous on loamy, hillocky 

 ground, where at the same time Hipp. Galatea, Argf/nnis 

 JViobe and Boiyaflavalis fly in multitudes, and Zygmna FUi- 

 pendnlce and Loniceroi will soon begin, or have just begun 

 to appear. Its favourite flower is Dianthus Carthusiano- 

 rum, on which it sleeps at night, hanging on the calyx, as 

 though to be less easily seen. More rarely it frequents Sca- 

 hlosa arvensis. The best time of the year to obtain good 

 specimens is the first half of July. 



SOME REMARKS ON ZYG.^N^. 

 By Professor Zeller. 



[Published in 1844, Ent. Zeitung, pp. 38-43.] 



1. Boisduval gives in his Monograph of the Zygcenidce, p. 7, 

 a notice on the larvae of Zygcsna, which seems less generally 

 known than it deserves. I therefore mention it here. The 

 larvae only feed for about fourteen days after their exclusion 

 from the egg, then they become torpid, and do not wake up 

 and recommence eating till the following spring. Thus they 

 sleep a large portion of the summer and all through the 

 autumn and winter. That occasional exceptions will occur, 

 is shown by Ochsenheimer's experience (Treitschke, x., 1, 

 p. 106), since he met with two specimens of Zygmna Tri- 

 folii in autumn, newly escaped from the pupa state; the 



