Vol. XI] VAN DYKE— PRIBILOF ISLANDS COLEOPTERA 157 



on the Coleoptera of Alaska and one which has served as the 

 basis for all subsequent studies. Since the Pribilof Islands became 

 a part of the United States, small collections of specimens have 

 been made from time to time by various collectors stopping there 

 or by those investigating the fur-seal herds. The two who have 

 collected the most are Professor Trevor Kincaid, who, while 

 working as a student under Dr. Jordan, in 1897, collected a fair 

 series of the Coleoptera, part of which went to the National 

 Museum and part remained behind in his own hands ; and Mr. 

 J. August Kusche who made a brief stop there in 1913 ; the bulk 

 of his material went to the Carnegie Museum at Pittsburgh. 



The Coleopterous fauna of the Pribilofs, as shown by the 

 species studied, is distinctly arctic. Most of the species are found 

 also on the Seward Peninsula and other parts of the adjacent 

 mainland. A few are met with on the Aleutian Islands, chiefly 

 the uplands of Unalaska Island ; but many of the most characteris- 

 tic species of the Aleutian Islands, those belonging to the Vancou- 

 veran fauna 6 , as I have called it, and which are also to be found 

 along the south side of the Alaska Peninsula and in southeastern 

 Alaska generally, are not to be found on the Pribilof Islands. 

 This would seem to indicate that they had at one time been con- 

 nected to the mainland to the east or northeast, never with the 

 Aleutian Islands, and had received their fauna from the former. 



CARABIDyE 

 1. Carabus truncaticollis Esch. 



Esch., Zoo. Atlas, V (1833), p. 22. 



Mots., Bull. Mosc, IV (1845), p. 337, t. 5 f. 3. 



Sahib. J., Col. and Hemiptera of the Vega Exped. (1885), 

 p. 12. 



Many specimens. The series shows many color phases, vary- 

 ing from brilliant green through bronze to almost black. This is 

 the largest and most conspicious beetle found on the islands. 

 Eschscholtz in his original description states that he found this 

 insect both at Kamchatka and on the Islands of St. George and 

 St. Paul. It has since been taken by numerous collectors on the* 

 Seward Peninsula and upper Yukon and by the Vega Expedition 



6 "The Distribution of Insects in Western North America," by Edwin C. 

 Van Dyke, Anns. Ent. Soc. Amer., Vol. XII (March, 1919), pp. 1-12. 



