ART. 11 COMMON OLD WORLD SWALLOWTAIL BUTTERFLY CLARK 11 



men bearing the label '' aUaska, male, type, S. H. S." in Scudder's 

 handwriting. It also carries a museum type label placed with it by 

 Samuel Henshaw. 



Professor Banks was good enough to compare this type specimen 

 with prints of the photographs shown as Figure 1 on Plate 2, and 

 Figure 1 on Plate 3. He writes that the type specimen agrees with 

 the specimen shown as Figure 1 on Plate 2 in having the first broad 

 pale band crossing the cell of the primaries with parallel sides and 

 not widened posteriorly, as well as in the other points about which I 

 inquired. On the back of the photograph reproduced as Figure 1 

 on Plate 2 he wrote " type like this." 



The specimen shown on Plate 2 may therefore be regarded as typi- 

 cal of P. ni. aliaska. 



Specimens examined. — Seventeen, with the following data: 

 Nushagak, Alaska (eastern end of Bristol Bay, at the base of the 

 Alaska Peninsula), July 5, 1881; St. Michael, Alaska (on the 5-outh- 

 ern shore of Norton Sound) ; Big Hurrah Creek, 40 miles northeast 

 of Nome, on the northern shore of Norton Sound ; Rampart (on the 

 Yukon in central Alaska), June 22; Koyukuk River, central Alaska 

 (lat. 67°-69° N., long. 151° W.), summer of 1901, Capt. A¥. J. Peters; 

 Alaska, vicinity of the Porcupine River on the Alaska- Yukon bound- 

 ary (lat. 67° 25' and 66° 31' N., long. 141° W.), June 12, 1912; 

 Yukon, Canada, July 18, 1916; Nahanni Mountains, Mackenzie, at 

 an altitude of 2,500 feet, July 16, 1903. 



In addition to these specimens I have been able, thanks to the 

 generosity of Dr. Karl Jordan, to study most excellent full-size 

 photographs of both surfaces of 12 specimens from the Ramparts on 

 the middle Yukon taken at an altitude of 1,000 to 3.000 feet m June, 

 1922, which are in the collection of the Zoological Museum at Tring, 

 Hertfordshire, England (pis. 5-8). 



Range. — From Bristol Bay (Nushagak River) north to Cape 

 Prince of Wales (Big Hurrah Creek) and eastward, extending north 

 of the Arctic Circle on the Koyukuk River in central Alaska and on 

 the Canadian border, as far as Mayo Lake, Yukon, the Nahanni 

 Mountains, Mackenzie, on the Yukon-Mackenzie boundary just north 

 of British Columbia (lat. 60° 48' N., long. 122° 40' W.), at an alti- 

 tude of 2,500 feet, and Atlin, in the extreme northwest of British 

 Columbia. This form inliabits mountainous or rugged country, 

 where it is found near woods or patches of trees or in sparsely 

 wooded areas. 



Season. — From the third Aveek in May to August ; most of the rec- 

 ords are in June and early July. 



Variation. — Papilio maeihaon aliaska is a very variable form, at 

 least in certain localities. Although the specimens figured by Verity, 



