464 Prof. E, B, Poulton on the Mimetic N, American 



V. Machaon Group. 



60 c. P. polyxenes asterius, Cram. 



South and north, from Honduras to Canada : west and 

 east, from Arizona and the Mississippi basin to the Atlantic. 

 Females mimetic throughout the range. Males mimetic 

 on under surface, but non-mimetic on upper except the 

 form ampliata, Menotr., common at Guerrero, Mexico. 

 Intermediates between amiMata and the males with non- 

 mimetic upper surface are also common in the same 

 locality. 



60 a. P. polyxcncs amcricus, Kollar, from N. Peru to 

 Colombia and Venezuela, also has a dark form of both 

 sexes, mclasina, Rothsch. and Jord., with all inter-grada- 

 tions between it and the light type form. The special 

 mimetic features of the female asterius are not developed 

 in this dark form, which is of great interest in helping 

 us to understand the evolution of the northern mimic 

 from a comparatively simple melanic variety. 



The larva of asterius is said to resemble that of Anosia 

 plcxipjyus (Scudder, 1, c, p. 747). 



VIa. Glaucus Group. 



In Rothschild and Jordan's memoir two consecutive 

 groups, of which this is the second, are both accidentally 

 numbered VI. I have therefore called this VIA. 



79 a. P. f/laucus glaucus, L. 



Atlantic district, from Florida to New England, and 

 westward to Mississippi basin. The female form glaucus 

 resembling the male is the ordinary one in the northern 

 districts, while the mumetic form turnus is commoner 

 than it in the southern. Intermediates occur but are 

 rare. 



79 b. P. glaucus canadensis, Rothsch. and Jord. 



Newfoundland, Anticosti, New Brunswick, Canada to 

 the north of British Columbia and Alaska. The females 

 resemble the males, and mimetic forms are unknown in 

 this subspecies, and the other species of the group. 



