ICHNEUMON-FLIES — GELINAE : MESOSTENINI 193 



solaterad of each antennal socket; temple rather wide and full, its 

 punctures moderately dense in male, moderately sparse in female; 

 occipital carina complete below, meeting hypostomal carina at 60° 

 to 85 ° ; hypostomal carina moderately high ; punctures on mesoscutum 

 and mesosterum ranging from moderately dense to moderately 

 sparse; front tarsus of female expanded, as in figure 374; ovipositor 

 sheath about 0.52 as long as front wing; ovipositor tip as in figure 

 328,1. 



This is a very common species from the Rocky Mountains west- 

 ward, mostly in the Canadian zone. It is usually found where there 

 is short grass and scattered conifers. The males fly actively around 

 the conifers. The females are seen usually crawhng over the ground, 

 among the grass tufts. Both sexes give off a strong musty odor 

 when captured. There are three subspecies, as treated below: 



1. Coxae mostly or entirely ferruginous; thorax of female ferruginous; range: 



Sierra Nevada to Pacific Ocean .... 7c. relativus punicus (Cresson) 

 Coxae mostly or entirely black; thorax of both sexes black 2 



2. Hind femur mostly or entirely red; range: Rockj^ Mountains to crest of 



Sierra Nevada, from Colorado and central California northward, also 



locally in New Mexico 7a. relativus relativus (Cresson) 



Hind femur mostly or entirely black; range: mostly in the Great Basin 

 and vicinity, but occurring also through most of the range of the subspecies 

 relativus 7b. relativus nitschei (Dalla Torre) 



7a. Trachysphyrus relativus relativus (Cresson) 



Cryptus relativus Cresson, 1878, Proc. Acad. Nat. Sci. Philadelphia, vol. 30, p. 



359; 9 . Type: ? , British Columbia (Philadelphia). 

 Cryptus pidifrons Cresson, 1878, Proc. Acad. Nat. Sci. Philadelphia, vol. 30, 



p. 360; cf . Type: d^, Green River, Wyoming Territory (Philadelphia). 



Ad^ale: Black. White markings as described for the male of nitschei; 

 scape often ferruginous or fulvous in front; palpi fuscous; front and 

 middle legs beyond first trochanters reddish fulvous, the femora some- 

 times infuscate basally; hind femur red, sometimes infuscate basally; 

 hind tibia and basitarsus brown to black; segment 5 of hind tarsus 

 fulvous ; wings subhyahne ; more or less of apical part of fu"st abdominal 

 segment and all of following segments red; apex of clasper often 

 infuscate. 



Female: Colored like female of nitschei except that front and middle 

 tibiae and all femora are red, the front and middle tarsi brownish red 

 to dark brown, and apex of first abdominal segment red. 



Specimens intermediate to the subspecies nitschei and punicus are 

 rather common among males, scarce among females. Males inter- 

 mediate between relativus and nitschei are from Mount Lyell, Calif.; 

 Blanco's Corral, Wliite Mt., Mono Co., Calif .; Secret Pass at 6,500 ft.. 

 Ruby Mts., Elko Co., Nev.; and Dixie, Elmore Co., Idaho, We have 



