HYMENOPTERA 125 



known from the Upper Austral Zone, all being common species 

 with a wide distribution, namely, Metaccelus lavis Cr., O^phion 

 bilineatum Say, Enicospilus purgatus Say, Dolerus a^rilis 

 Norton, etc. 



The results of the collection in this order, made by the Harri- 

 man Expedition, are therefore most surprising considering that 

 nearly all were taken in the coastal region, within the brief 

 period of two months, between the first of June and the first of 

 August. They fully demonstrate that this gold-bearing 

 country is as rich in representatives of this order as any other 

 similar region of boreal America ; and they make it highly 

 probable that when the interior of Alaska has been thoroughly 

 exploited, a large majority of the species occurring in the Boreal 

 Zone (British Columbia, Upper Canada and in the higher alti- 

 tudes of the United States) will be found. 



In this contribution towards the results of the Expedition I 

 have also included, with the permission of Dr. C. Hart Merriam, 

 editor of the papers of the expedition, all known Hymenoptera 

 from Alaska and have incorporated all unstudied Alaskan 

 material in the National Museum with the threefold object of 

 (a) giving the results of the Harriman Expedition, (&) describing 

 the new species in the National Museum, and (c) giving a com- 

 plete list of Alaskan Hymenoptera, for the benefit of students 

 and for the guidance of future expeditions, so that special efforts 

 may be made to collect in families and genera not yet reported 

 from Alaska. 



I congratulate Mr. Harriman upon the splendid results obtained 

 by his expedition and the National Museum in being made the 

 depository of the rich collections made in the classes Insecta 

 and Arachnida the finest ever made in Alaska. 



The arrangement of the families and genera is in accordance 

 with the writer's views on the classification of these insects. All 

 species not otherwise credited were received from the Harriman 

 Expedition. It should also be noted that the specimens credited 

 to the Fur Seal Commission, with few exceptions, were also 

 collected by Professor Kincaid. 



The following is a systematically arranged summary of the 

 results : 



