ICHNEUMON-FLIES — GELINAE : MESOSTENINI 



527 



Figure 306. — Localities for 

 Sphecophaga vesparum hurra. 



fulvous, the front and middle coxae and trochanters, front side of 

 front and middle femora, and front and middle tibiae except for lower 

 side, pale j^ellow; abdomen fulvoferruginous. 



Overwintering form, female: Head fulvous to ferruginous, the 

 orbits in front (broadly) and cheek, white or yellow; middle of frons 

 and much of occiput infuscate; mouth parts variously fulvous to 

 stramineous; antenna light to dark brown, its scape paler in front; 

 thorax fulvous to brownish ferruginous, with varying amounts of 

 fuscous below, near wing bases, and on sutures, the front margin 

 (usually) and hind corner of pronotum, tegula, and subtegular ridge 

 whitish to yellow, or light brown; legs fulvous to ferruginous; abdomen 

 entirely fulvous to ferruginous. 



Summer form, female: Head reddish brown to black, usually with 

 anterior orbit, cheek, and part of clypeus variously marked with paler, 

 but usually the anterior orbit not broadly white or yellow as in the 

 ovei'wmtering form; mandible light brown; palpi stramineous; antenna 

 brown; thorax varying from almost entirely black to mostly brownish 

 ferruginous with extensive sutural infuscation, the tegula, subtegular 

 ridge, hind corner of pronotum, and usually some or all of upper 

 margin of pronotum pale brown to whitish; legs fulvous or fulvofer- 

 ruginous, the coxae often with a little basal infuscation, sometimes all 

 of the coxae and trochanters moderatel^^ infuscate; abdomen varying 

 from entirely fulvous or ferruginous to entbely black, usually largely 

 or entkely pale. 



The subspecies has thi'ee regional races which are usually easy to 

 distinguish: 1. In the eastern half of the contment the fuscous mark- 

 mgs are extensive and white markings average larger and more sharply 

 defined. In the summer form the mesoscutum is usually black or 

 blackish. 2. In the western half of the continent, north of the lati- 

 tude of San Francisco, most individuals are bro^/vnish ferruginous. 



