On page 42 of my "Butterflies through Binoculars, The West" it says of the Parnassians, "In Europe, this group is called apollos." So you're right!

I'm sure you're right - it looks just like the Phoebus Parnassian in my recently purchased "Butterflies through Binoculars, The West" - plate 8, page 43.

Now I have two questions:
1) How did you link the two images? I should probably link the two image of the Pale Swallowtail that I just posted.

2) There doesn't seem to be a guide page for the Phoebus Parnassian. Where should I put the images?

First of all, the images will link automatically if after posting the first image, you view that image and click on "add image". All of the data from the first image automatically appears on the new submission page. You only have to add the image and any new comment you might want to make, and the two images will be linked.

Second, if you forget and post the two images separately, you can click on "tag" on one image and it will appear in the upper left of your screen. Then go to the other image and click on "tag". Now both images will be in the upper left, along with the opportunity to "link" them.

Unfortunately, we already linked your swallowtails, so you don't get to practice it yet!

We can make a guide page but we'd like to wait until a butterfly expert confirms the species identification.