ICHNEUMON-FLIES, PART 2\ EPHIALTINAE 



29 



Figure 6. — Localities for 

 Scambus (Ateleophad?ius) 

 pterophori. 



except between and beyond the median carinae; hind femur about 4.0 

 times as long as deep; abdomen rather stout; tergite 1 about as wide 

 as long, with sides sparsely, and median area beyond the basal de- 

 clivity rather densely, punctate; tergites 2-6, except on apices, with 

 numerous distinct punctures; tergite 7 rather smooth except for a 

 few indistinct punctures; subgenital plate with a rather small, median 

 basal, membranous excision; sheath about 0.7 times as long as ab- 

 domen. 



Black, occasionally with abdominal tergites more or less piceous. 

 Flagellum brownish beneath; clypeus piceous; palpi strongly fuscous; 

 tegula pale yellowish; hind corner of pronotum narrowly pale yellowish 

 brown; stigma blackish, with an obscure pale spot at base; legs rather 

 uniformly reddish, with front coxa usually brownish or blackish 

 basally, and hind tibia sometimes with obscure subbasal and apical 

 infuscations. 



This species is unusually variable in body proportions, specimens 

 ranging from moderately slender to rather stout. There is some 

 indication from reared material that the body shape may vary accord- 

 ing to the host and its environment, slender specimens being associ- 

 ated with rather slender hosts living in slender stems, and stouter 

 specimens with more stocky hosts living in fleshy structures such as 

 seed pods. Careful breeding studies are greatly to be desired to 

 obtain a better understanding of the nature of such variation. 



Specimens (439 cf, 4299): From Alaska (Big Delta, Cold Bay, 

 Haines, King Salmon on Naknek River, Makushin Bay on Unalaska 

 Island, and Naknek) ; Alberta (Banff and Lethbridge) ; Arizona (near 

 Alpine, Oak Creek Canyon, and White Mountain Reserve east of 

 McNary) ; British Columbia (Agassiz, Downie Creek in Selkirk 

 Mountains, Hatzic Lake, Kelowna, Likely, Manning Park, Oliver, 

 Revelstoke in Selkirk Mountains, Robson, and Williams Lake); 

 California (Alameda, Albany, Antioch, Barton Flat, Benecia, Berkeley, 



