ICHNEUMON-FLIES — GELINAE : MESOSTENINI 519 



Hind femur fulvous with its apical 0.15 ± weakly to strongly infuscate; male 

 tyloids on about 9 segments, the profile of all of them sharply pointed; range: 

 Oregon and Idaho to Alaska 5b. albator yukonensis (Ashmead) 



5a. Helcostizus albator albator (Thunberg) 



Ichneumon albator Thunberg, 1822, M6m. Acad. Sci. St. P^tersbourg, vol. 8, p. 

 257 [key]; 1824, vol. 9, p. 300 [description]; [9]. Type: 9, Sweden? 

 (Uppsala) . 



Tyloids of male flagellum occurring on about 7 segments, formed as 

 high short ridges, the basal ones in profile mesalike, the more distal 

 ones triangular in profile. 



Differs in color from the subspecies yukonensis in having hmd femur 

 uniformly fulvous, without an apical infuscation, and hind tibia and 

 tarsus medium brown rather than dark brown. The hind coxa of 

 male is black and the first hind trochanter of male is mostly fuscous. 



Specimens: 4cr, 69, from Germany and Sweden. 



This subspecies is widely distributed in Europe. It is recorded in 

 literature as parasitic on Saperda calcarata and Callidium glabratum. 



5b. Helcostizus albator yukonensis (Ashmead), new status 



Pimpla yukonensis Ashmead, 1890, Proc. U.S. Nat. Mus., vol. 12, p. 445; 9 • 

 Type: 9, Fort Yukon, Alaska (Washington). 



Tyloids of male flagellum occurring on about 9 segments, in profile 

 appearing as triangular points, the distal ones progressively smaller 

 and sharper. 



Male: Black. Face, cheek, sometimes lower part of temple, 

 clypeus, mouth parts, front of scape and pedicel, often a large area 

 on propleurum, sometimes small stripe on lower edge of pronotum, 

 hind corner of pronotum, tegula, often spot on subtegular ridge, and 

 front and middle coxae and trochanters, white; femora fulvous, the 

 apical 0.12 ± of hind femur weakly infuscate; front and middle tibiae 

 fulvous; front tarsus brownish fulvous, the last segment dark brown; 

 middle tarsus brown, darkest apically; hind coxa black or fulvous; 

 hind trochanters fulvous, the first hind trochanter more or less 

 infuscate; hind tibia rather dark brown, its base sometimes paler 

 brown; hind tarsus fuscous brown. The front and middle coxae are 

 sometimes more or less fulvous. 



Female : Black or blacldsh. Face often with a whitish median spot 

 near its upper edge ; cheek sometimes stramineous next to mandible ; 

 labrum stramineous; first two segments of maxillary palpus and first 

 three of labial palpus whitish, the rest of the palpi fuscous; flagellum 

 with a white band that covers two segments; extreme hind corner of 

 pronotum white or stramineous; tegula white; mesosternum and 

 mesopleurum and metapleurum sometimes more or less fulvous; 



