Eastern/Canadian Tiger Swallowtails

[John V. Calhoun]

kirk.zufelt at utoronto.ca wrote:
> 
> I am interested in opinions in regards to the validity of these insects as
> seperate species.

In addition to James Adam's suggestion, try checking out the original 
paper which splits these taxa (if you havn't seen it already): 

Hagen, R. H., R. C. Lederhouse, J. L. Bossart and J. M. Scriber. Papilio 
canadensis and P. glaucus (Papilionidae) are distinct species.  J. 
Lepidopterists' Society. 45: 245-258. 1991.

Based on years of research, this paper presents a pretty convincing 
argument for the recognition of P. canadensis as specific. 

Best,
John