ART. 11 COMMON OLD WORLD SWALLOWTAIL BUTTERFLY — CLARK 9 



the Department of Terrestrial Magnetism, Carnegie Institution of 

 Washington. 



The preceding information was taken from the label accompany- 

 ing the specimen. Captain Peters writes me that the collection of 

 insects that included this specimen, and also several examples of P. m. 

 aliaska. was made by Tom Hunt, one of his field men, between the 

 middle of June and August 10, 1901, along the western slope of the 

 valley of the Totsenbetna River, and from the headwaters of the 

 Anaktuvuk River down this river to the Arctic Ocean. 



Additional sfecimen. — A male from the Ramparts, on the middle 

 Yukon, taken at an altitude of 1,000 to 3,000 feet in June, 1922, of 

 which Dr. Karl Jordan was so very kind as to send me photographs 

 of both surfaces (pi. 5, fig. 3; pi. 6, fig. 3; see page 13) is very close 

 to the type, which was captured about 75 miles to the north. 



The light dusting on the dark base of the fore wings above, and 

 on the dark outer border just within the row of yellow spots, is as 

 heavy as in most specimens of P. in. aliaska — heavier than in some. 

 On the hind Mnngs the blue spots on the dark margin between the 

 lunules and the inner border are prominent, though rather small as 

 in the type. On the under side the light scaling on the black band 

 following the submarginal yeSlow band on the fore wings is well 

 developed, forming a narrow median line, and the light dusting be- 

 tween the submarginal lunnles and the inner edge of the dark border 

 on the hind wings is heavy. These features are probably due to 

 the fact that this is a fresh specimen, while the type is rather worn. 



The wing shape of this specimen is identical with that of the type, 

 as is shown by superposition of photographs before a strong light. 

 On the upper surface the band across the outer half of the cell of the 

 fore wing is narrower than in the type, and the inner margin of the 

 dark outer border of the hind wing is somewhat more evenly curved. 

 On the under side of the fore wing the band across the middle of 

 the cell and that across the end of the cell are slightly narrower than 

 in the type. 



NoU. — Papilio machaon petersii bears much the same I'elation to 

 P. m. hudsonianus that PapiJio glaucus arcticus l^ears to P. g. glaucus 

 and P. marcellus marcellus bears to P. m. lecontei. It appears to be 

 a dwarf form living under rigorous conditions. 



The present subspecies differs from P. machaon hudsonianus in 

 the direction of P, m. kamfschadalus, which is a small deeply colored 

 form with the outer border of the wings convex, short tails, a sub- 

 marginal band on the under side of the fore wings, and enlarged 

 submarginal lunules on the hind wings. Indeed, both P. m. fetersii 

 and P. m. hudsonianus might be considered, especially on the basis 

 of the wing shape and the color, to be more closely related to P. m. 

 kamtschadalus than to any other subspecies of P. machaon. Verity 



