70 



U. S. NATIONAL MUSEUM BULLETIN 216 



Hosts: Specimens examined include rearings from Acleris sp. on 

 Cornus, Choristoneura conflictana (Walker) , C. jumiferana (Clemens) , 

 Endothenia hebesana (Hubner), Exotelia dodecella (Linnaeus), Lym- 

 naecia phragmitella (Stainton) , Malacosoma pluviale (Dyar) , Phalonia 

 rutilana (Hubner), Recurvaria sp., Sparganothis sulphureana Clemens, 

 Spilonota ocellana (Denis and Schiffermiiller) , Trichotaphe levisella 

 (Fyles) and Rhyacionia buoliana (Schiffermuller) . 



This is one of the commonest Nearctic species. It has a trans- 

 continental distribution and is especially abundant in the Transition 

 and Canadian zones. 



15. Scambus (Scambus) nucum (Ratzeburg) 



Figure 312,g 



Pimpla nucum Ratzeburg, 1844, Die Ichneumonen der Forstinsecten ... 

 vol. 1, p. 115. Type: 9 , Germany (destroyed in World War II). 



Male: Front femur with a distinct double excision beneath, the 

 excised regions with distinct coriaceous sculpture; structure otherwise 

 as in males of tecumseh. 



Hind coxa usually fuscous ; hind femur usually more or less suffused 

 with blackish color; otherwise as in tecumseh. 



Female: Structure as in tecumseh. 



Hind angle of pronotum with a very small or indistinct yellowish 

 spot; stigma translucent yellowish brown; color otherwise as in 

 tecumseh. 



Figure 25. — Localities for 

 Scambus {Scambus) 

 nucum. 



Specimens (8d", 159): From Alaska (Hope on Kenai Peninsula, 

 Seward, and Taku Glacier near Juneau) ; British Columbia (Mission 

 City and Diamond Head trail at 3,200 ft., near Squamish); New 

 Hampshire (Lake of the Clouds at 5,000 ft. on Mount Washington) ; 

 Northwest Territories (Norman Wells) ; Nova Scotia (Blomidon and 

 Annapolis) ; Quebec (Berthierville) . 



