ICHNEUMON-FLIES, PART 2 1 XORIDLNAE 497 



This species occurs in most of the United States and in Mexico. 

 It is divisible into six subspecies, as treated below: 



1. Hind tibia uniformly black 2 



Hind tibia black with its basal 0.15 much paler (white to light brown). . 3 



2. First three tergites and median lobe of mesoscutum black; front and middle 



femora and tibiae fulvous; range: southern California. 



le. humeralis excomptus, new subspecies 

 First three tergites and much or all of median lobe of mesoscutum ferruginous; 

 front and middle femora and tibiae black; range: southern Arizona. 



If. humeralis chiricensis, new subspecies 



3. Hind basitarsus light brown; middle femur dark brown to blackish; wings rather 



strongly infuscate or banded with fuscous 4 



Hind basitarsus blackish to dark brown, rarely light brown; middle femur ful- 

 vous, rarely dark brown ; wings subhy aline or faintly infuscate, or indistinctly 

 banded with fuscous 5 



4. Front wing faintly infuscate, with weak transverse infuscate banding; first three 



tergites blackish; range: Mexico and part of Texas. 



la. humeralis mexicanus, new subspecies 



Front wing rather uniformly brown; first three tergites strongly stained with 



ferruginous; range: Florida lb. humeralis piceatus (Rohwer) 



5. Basal 0.15 of tibiae whitish; hind coxa black, rarely fulvous; range: eastern 



North America except Florida lc. humeralis humeralis (Say) 



Basal 0.15 of tibiae fulvous to brown; hind coxa fulvous in female, fulvous or 

 blackish in male; range: California, especially in the Sierra Nevada. 



Id. humeralis sierrae, new subspecies 



la. Xorides (Exomus) humeralis mexicanus, new subspecies 



Male: Unknown. 



Female: Black with a faint ferruginous tinge. Flagellum black, 

 with a white band; tegula reddish brown; trochanters and narrow apex 

 of tibiae reddish brown; narrow apex of femora and basal 0.15 of tibiae 

 whitish; tarsi pale brown, their fifth segment black; wings with a light 

 fuscous tinge, the front wing with indistinct transverse infuscate bands 

 at the level of the basal vein and at level of apex of stigma, its tip a 

 little darkened. 



Type: 9, 6 miles west of Antiguo, Mexico, 1,200 ft., July 21, 1954, 

 University of Kansas Mexican Expedition (Lawrence). 



Paratypes: 9, same data as type (Lawrence). 9, Eastland Co., 

 Tex., Apr. 2, 1921, Grace O. Wiley (St. Paul). 



lb. Xorides (Exomus) humeralis piceatus (Rohwer), new combination 



Xylonomus (Moerophora) piceatus Rohwer, 1913, Proc. U. S. Nat. Mus., vol. 45, 

 p. 357; ? . Type: 9 , Dade Co., Fla. (Washington). 



Male: Unknown. 



Female : Fuscoferruginous, the coxae, femora, hind tibia, and fourth 

 and following tergites more blackish. Flagellum black, with a white 

 band; tegula, trochanters, base and apex of femora, and front and 

 middle tibiae reddish brown, the apical margin of femora pale fulvous; 



