218 



LRPTDOPTERA. 



Telamonides, and Marcellus, but from these only two 

 forms are reproduced in succession, Walshii before 

 the 15 th of April, and Telamonides between the 15 th 

 of April and the 1st of June, and Marcellus is born 

 from these alone by the new eggs they produce after 

 this date. 



According to Weismann, this polymorphism is due 

 to the direct influence of the physical surroundings 

 acting upon the chrysaKs through certain fixed periods 

 of time. 



LYC.EXID.E. 



The Lyccenidse, or gossamer-winged butterflies, in- 

 clude small but beautiful insects known under the 

 popular names of the " blues," " coppers," and " hair- 

 streaks." Our American copper, Heodes Hypophlceas, 

 Boisd. (Fig. 172, natural 

 size), is an example of 

 this family. The fore-legs 

 of the female are like 

 the other two pairs, but 

 those of the male have ^ 

 undergone changes ren- 

 dering them less useful 



Fig. 172. 



for supporting the insect. The caterpillar when first 

 hatched has long hairs, but when older (Fig. 173, nat- 



