(iO A CHAPTER ON ZYG^NA MINOS. 



differences except the above-mentioned characters. Only I 

 may remark this, and I consider it of some importance, that 

 the yellow larvae almost all produced females, whereas the 

 white larvae furnished mostly males and very few females. 

 Should, therefore, the difference of colour in the larvas in- 

 dicate the sexes ? I should further observe, that the yellow 

 larvae had a dark dorsal stripe, whereas on the white or 

 whitish-blue larvae no dorsal stripe was perceptible. The 

 cocoons of the yellow larvae were silvery-grey, some few 

 cocoons were, however, pale yellow. The cocoons of the 

 white larvae were also much flatter, and not so vaulted as 

 those of the yellow larvae. 



Altogether, out of the mass of larvae I obtained about 30 

 perfect insects ; the greater part of which, as I could see no 

 sufficient distinction between them, I set at liberty. Also in 

 the form of the pupae could I find no difference. They were 

 very soft, some yellowish-brown, some black-brown, some 

 altogether black. 



The perfect insects appeared from the 25th June to the 

 10th of July. 



If we reflect on the difference in the colour and markings 

 of the larvae, it is of course very probable, that if the 

 differences do not indicate the sexes here two species may be 

 mixed, yet it will always be a difficult matter to find out any 

 good points of distinction in the perfect insects. 



NOTE ON ZYG^NA MINOS. 

 By Professor Hering. 



[Published in 1846, Stett. Ent. Zeitung, p. 235.] 

 ZygcBna Minos, var h. Heriiigi, Zeller, 



The larva of the ordinary Zygwna Minos, which we find 

 here almost exclusively on Pimpinella Saxifraga, never 



