THE CANADIAN ENTOMOLOGIST. 237 



winter, viz., 5 Oregouia; 14 Bairdii ; and most of them, by their 

 size, I consider to be females. Of the entire number of p upas (77), forty 

 per cent, gave butterflies in the fall of 1894, thirty-two per cent, in spring 

 of 1895, and twenty-eight per cent, will probably go to 1896. 



I spoke of Mr. Bruce going after eggs of Chionobas CEno. The 

 weather at Denver was fair just at that time, but at Hall Valley (i 1,000 

 elev.), and on the peaks, as forbidding as could be ; day after day during 

 his stay at his old cabin near top of Mt. Gibson, rain, snow and fog. But 

 he found specimens of CEiio resting under the shelter of rocks, and took 

 some females by hand. These he brought to Hall Valley, and being 

 confined over grass in the house there, they laid forty-five eggs, which 

 were sent to Mrs. Peart, and in her care they hatched and the caterpillars 

 reached pupse the same season. Mrs. Peart was able to get the entire set 

 of drawings of the early stages, and they will be given in Part XVH., 

 Butt. N. A., in due time. It is enough that these stages support the con- 

 clusions I had published, that CE.110 is a distinct species from Semidea. 

 My trip to Colorado was as much to get eggs of CEno as to rear the Papilio 

 larvae, and the success in one case, as in the other, is owing to Mr. Bruce's 

 efforts. 



I have in this, and the paper in Vol. XXV. referred to, spoken of the 

 two Glenwood Papilios as Bairdii a.nd Oregonia,h\.\i being hybrids, neither 

 form is often true to type. Some Bairdii are typical ; that is, they can 

 not be distinguished from the examples taken in Arizona, where there are 

 no Oregouia, and can be no intermixture. But most depart in different 

 degrees from the type, no two being quite alike ; are gayer, with yellow 

 markings on the upper side, and much more so beneath, running off to 

 Hollandii, which seems to be the extreme of variation. 



Scarcely any of the so-called Oregouia taken or bred at Glenwood 

 Springs agree fully with the type found, which flies where there are no 

 Bairdii, in Washington and British Columbia. They are modified in the 

 direction of Bairdii in several particulars. The typical male Oregouia, 

 on the upper side, has the basal area of the fore wings thickly dusted 

 with yellow scales. The submarginal black band on both wings also 

 much dusted yellow. Beneath, the base of cell on fore wi/igs is altvays 

 gray-yellow ; the nerves and branches of both wings are lightly edged 

 with black ; the submarginal band is largely covered with yellow scales, 

 and the blue ofi hind 7vings is azure. The abdomen on ventral side is 



