ICHNEUMON-FLIES, PART 2t XORIDINAE 463 



diameter; mesepimeron "with hairs on its upper 0.8 ±, or sometimes 

 on its entire length, sparser below; metapleurum with rather small, 

 sharp, dense punctures and with wrinkling medially, more strongly 

 wrinkled posteriorly; petiolar area about 0.43 as long as combined 

 areola and basal area; propodeal teeth weak, about 0.3 as long as their 

 basal width; first lateral area with rather dense hairs all over; hind 

 femur about 1.92 as long as deep, with sharp dense punctures all over, 

 the punctures finer and denser on its upper half; hairs on hind femur 

 short; second segment of middle tarsus about 1.5 as long as deep; 

 fifth segment of hind tarsus about 1.5 as long as second segment; 

 second tergite smooth, subpolished, weakly rugulose at extreme base, 

 its punctures small, rather sharp, very sparse, separated by about 2.5 

 the length of the hairs; ovipositor sheath about 1.1 as long as front 

 wing. 



The female of the species is the only one in our area with the ab- 

 domen red and mesoscutum densely punctate. The closest relative 

 is 0. pinetorum of Europe. 



There are two subspecies as keyed and described below: 



MALES 



1. Front and middle femora entirely fulvous or sometimes fuscofulvous; range: 



Montana to Arizona. (Male specimens frequently not distinguishable 



from the subspecies fergusoni) . . 9a. abdoininate abdominale (Cresson) 



Front and middle femora entirely fulvous; range: Alberta, British Columbia, 



Washington, and Oregon . . . 9b. abdominale fergusoni, new subspecies 



FEMALES 



1. Hind coxa black or mostly blackish; range: Montana to Arizona. 



9a. abdominale abdominale (Cresson) 

 Hind coxa fulvous, sometimes infuscate basally; range: Alberta, British Co- 

 lumbia, Washington, and Oregon. 



9b. abdominale fergusoni, new subspecies 



9a. Odontocolon abdominale abdominale (Cresson) 



Odontomerus abdominale Cresson, 1S65, Proc. Ent. Soc. Philadelphia, vol. 4, 

 p. 289; 9 . Lectotype: ?, Colorado (Philadelphia) . 



Male: Black. Palpi dark brown; front and middle coxae often 

 more or less tinged with fulvous; first trochanters light brown to 

 blackish; second trochanters, femora, and front and middle tibiae 

 fulvous, the front and middle femora often more or less infuscate, 

 especially toward the base; front and middle tarsi brown, darkest 

 apically; hind tibia brownish fulvous, darker apically and above; 

 hind tarsus fuscous brown; second tergite, apical 0.2 ± of first tergite, 

 and basal 0.3 ± of third tergite often more or less fulvoferruginous, 

 the rest of abdomen blackish but often with fulvoferruginous tinges; 

 wings weakly infuscate. 



