28 ALASKA INSECTS 



Edw., which was new to the collection. Of the moths the most 

 conspicuous were the two Arctiidae, Platarctia -parthenos 

 Harr. and Nemeophila -plantaginis L. A species of Plusia 

 taken here has been described by Dr. Ottolengui as P. epsilon 

 sp. nov., while a Sesiid in the collection, of which a solitary 

 specimen was taken at this station, was described as new by 

 Mr. Beutenmuller under the name Scsia arctica sp. nov. 



The Apoidea included four species of Bombus (B. modera- 

 /wsCr., B. oregonensis Cr., B.^olaris Curtis, B. -phuralis Nyl.) 

 and a new form of Psithyrus (P. kadiakensis sp. nov. Ashmead). 

 The saw-flies comprised Dolerus sert'ceus, three species of 

 Tenthredo (T. ferrugineipes Cr., T. varipes Nort., and T. 

 evansu'YLgtn.}, Trichiosoma triangulum aleutiana Cr., and Cim- 

 bex americana Leach. A colony of ants (Formica neorufibarbis 

 Em.) was found here in searching for beetles under a decayed 

 cottonwood log. 



Odonata were observed in great numbers about a small lake 

 at the rear of the village. Four species were taken, which have 

 been determined by Mr. Currie as Enallagma calverti Morse, 

 sEschna juncea (L.), sEschna constricta (Say), and Soma- 

 tochlora albicincta (Burm.). 



Spiders were very abundant, more species being collected 

 here in an hour than were secured at Popof Island in ten days. 

 It was rather surprising to note also, that of the fifteen species 

 captured at Kadiak only four occur in the list from Popof, as 

 determined by Mr. Banks. The series includes the two Pha- 

 langids Sclerobunus brunneus Banks and Liobunum exilrpes 

 (Wood), the former described from Washington, the latter from 

 California. 



POPOF ISLAND, SHUMAGIN ISLANDS 



July ji8. The most extensive and satisfactory collection 

 of insects secured by the Expedition was made on Popof Island, 

 one of the Shumagin group. This group lies midway between 

 Kadiak Island and Unalaska, and is separated by a narrow 

 strait from the mainland of the Alaska Peninsula. Several 

 islands go to form the group, the principal ones being Unga, 

 Nagai, and Popof. On the morning of July 7 a small party 

 was landed at Sand Point, a fishing station on Popof Island, 



