87 



j\l)'. H. Eltringham has kindl}- made preparations of the male 

 armature of these three forms of Linienitis, together with those of 

 the ancestral North American species of the genus ; and the com- 

 parison of these organs entirely supports the conclusions drawn 

 from a study of the patterns. The form of armature in archippim 

 resembles that of fioridcnsis, while the armature of hiihti is 

 transitional between these two and the ancestral forms art lie mi sand 

 tvcidermeyeri. A full account of the relationship between these 

 North American species of IJmenitis has been recently communicated 

 to the Academy of Natural Sciences of Philadelphia, and it is hoped 

 that reproductions of Mr. Eltringham's drawings will appear in the 

 publications of the Society. 



With regard to L. lonjuim, it is probable that mimicry has pro- 

 ceeded in another direction, and that the cream colour of the pale 

 markings and the bright fulvous tip of the forewing have been 

 produced in mimicry of Aildjilia (HeterncJiyaa) californica, the single 

 northern representative of a large tropical American group. That 

 the bright fulvous tip has been produced by mimicry, is supported by 

 the fact that it tends to decrease in British Columbia and Vancouver's 

 Island, well to the north of the geographical range of the model, as 

 shown in Plate XXV. of "Trans. Ent. Soc," London, 1908. 



