tRt CANADIAN ENfOMOLOGIST. 239 



Besides the hybrid varieties above mentioned is another that is very 

 close to Zolicaofi. One such example (male), out of egg of Bairdii, is of 

 small size, very black above, slight dusting of yellow at base of fore 

 wings, none on the submarginal band. Beneath the cell as in typical 

 Zolicaon; that is, solid black, except the two yellow bars at and near the 

 arc ; the nervures rather heavily edged black ; the blue, dark ; and 7nuch 

 deep orange on hind wings in ail the interspaces next the black of the 

 submarginal band, and also orange on the marginal hmules. The ventral 

 side of abdomen solid black, by the widening of the two ventral lines so 

 as to be confluent throughout, and the widening of the lateral stripes ; 

 next thorax the four stripes making that part of the abdomen altogether 

 black, as in Zolicaon. This example has the anal black spot of Oregonia 

 and Bairdii ; that is, a pear-shaped spot, attached to the black edge of 

 the inner margin of wing ; whereas the spot in true Zolicaon is round, 

 unattached. But that sort of spot appears sometimes in both true Oregonia 

 and Bairdii, though it is rare. Except for that anal spot it would be 

 hard to say wherein this male differs from a Zolicaon. Mr. Bruce has 

 this season had a specimen come from these Glenwood pupse that, 

 he says, had he taken it on the wing he should have called Zolicaon. 



From what I have said, it must be evident that the so-called 

 Oregonia of Glenwood Springs is not the real article, not true 

 Oregonia. It is more black, less dusted yellow (on both sides); 

 the cell of under fore wings black (an important character) ; 

 the veins beneath all more heavily edged with black; the blue, dark instead 

 of azure ; the abdomen rather black than yellow on the ventral side. That 

 IS not Oregonia, but a distinct type of butterfly, which, if it had been 

 brought in from Arizona by the Wheeler Expedition, would have been 

 pronounced a species. It may be supposed that it originated in the 

 mating of true Oregonia with true Bairdii, at some period in the past. 

 Whether these two species, pure type, now mingle in that region, I can 

 not say, because I have not seen a pure Oregonia which was taken there. 

 As to Bairdii, it varies so much, even where no Oregonias fly, and where 

 there is no suggestion of intermixture, that we cannot say what the pure 

 form is. These butterflies, as they now appear at Glenwood Springs, 

 may have begun their career as hybrids, fifty, or one hundred and fifty, 

 or five hundred years ago — no one can guess when ; there has been 

 evolved a distinct form, allied to Oregonia. It never will do for such 

 a form to be flying without name, and I call it Papilio BRUCEI, and 



