53 



NOTES ON NORTH AMERICAN DIURNAL 



LEPIDOPTERA 



PAPILIONIDAE 



P. americus Koll. (PI. IV, Fig. 1). 



This species is figured by Edwards (Butt. N. Am. Ill, Pap. Ill) 

 and listed as having been captured by the Wheeler Expedition in 

 Arizona. Rothschild and Jordan in their revision of N. Am. Papilios 

 (p. 542) cast doubt on this record and imagine some mistake in 

 labelling has occurred. A couple of years ago we received a batch 

 of Papilio pupae from Mr. C. Biederman of Palmerlee, Ariz, which 

 hatched out in the early spring into normal astcrius with the excep- 

 tion of one 9 which proved to be almost an exact counterpart of 

 Edwards' figure of americus, the color being merely slightly paler and 

 the abdomen lacking the subdorsal rows of spots and having in their 

 place a broad lateral stripe; we at first took it to be orcgonia but the 

 cell on the underside of the primaries showed no trace of yellow shad- 

 ing and precluded association with this species. We could detect no 

 difference in the pupae and can only conclude that occasionally speci- 

 mens of asterius occur in Arizona which can scarcely be separated 

 from americus; this is all the more strange as the 2 form in this 

 region tends to a diminution of the yellow markings rather than to 

 an increase of the same. We figure the specimen in question. 



P. glaucus Linn. (PI. IV, Figs. 3, 4). 



The race described as canadensis by Rothschild & Jordan (1906, 

 Rev. Am. Pap. p. 586 (Aug.)) was apparently described a few 

 months later by Skinner as rutulus var. arcticus (Ent. News. XVII, 

 378, Dec). The typical form of canadensis is from Newfoundland 

 and that of arcticus from Alaska; we have specimens before us from 

 both localities and from many intermediate points and fail to find 

 any marked points of distinction between them ; we imagine the race 

 is common to the whole of Northern America even extending down 

 into the higher portions of New York state; canadensis resembles 

 rutulus in having the submarginal yellow spots on the underside of 

 the primaries more or less united into a band and this doubtless 

 led Skinner to place arcticus as a race of rutulus; on the other hand 

 the orange costal spot at the apex of the secondaries points very de- 



