122 U. S. NATIONAL MUSEUM BULLETIN 216 



The small size, short tergites, flat face of female, and nervellus 

 broken near the middle, together with the species group character of 

 the ovipositor tip, make this species easy to distinguish. 



This is a Holarctic species parasitic on curculionoid larvae under 

 the bark of northern conifers. There is a European and a North 

 American subspecies as keyed and described below: 



1. Abdomen less densely punctate, the punctures on tubercles of second to fourth 

 tergites of female separated by about 0.7 their diameter, the middle field of 

 first tergite with only a few punctures apically; hair on outer side of middle 

 coxa of male not unusually dense; hind coxa of male fulvous to black; 

 tegula entirely white or its apical margin faintly brownish. Range: Cana- 

 dian zone of North America . . . 4a. terebrans nubilipennis (Viereck) 

 Abdomen more densely punctate, the punctures on tubercles of second to 

 fourth tergites of female separated by about 0.3 their diameter; hair on 

 outer side of middle coxa of male rather dense; hind coxa of male entirely 

 black; tegula ivory, its apex conspicuously brownish. Range: northern 

 Europe 4b. terebrans terebrans (R,atzeburg) 



4a. Dolichomitus terebrans nubilipennis (Viereck), new status and new 



combination 



Exeristes nubilipennis Viereck, 1912, Proc. U. S. Nat. Mus., vol. 42, p. 638; ? . 



Type: ?, Columbia Falls, Mont. (Washington). 

 Exeristes hyalinipennis Viereck, 1912, Proc. U. S. Nat. Mus., vol. 42, p. 638; ? . 



Type: ?, Columbia Falls, Mont. (Washington). 



This subspecies is a little more slender than D. terebrans terebrans 

 (the European subspecies), with sparser and coarser punctures, and 

 some color differences as noted in the key. There are some additional 

 minor differences in coloration, as described below. 



Male: Black. Palpi, tegula, sometimes extreme hind corner of 

 pronotum, front and middle trochanters, and second trochanter of hind 

 leg, white; front and middle coxae white, more or less fulvous basally; 

 hind coxa fulvous to black; first trochanter of hind leg brown, its 

 apex white; front and middle femora fulvous, whitish at apex in 

 front; hind femur brown, its extreme base fulvous and extreme apex 

 whitish; front tibia whitish and pale fulvous; middle tibia white 

 basally, pale fulvous apically; hind tibia fuscous, its basal 0.15 and 

 under side of its basal 0.6 white or whitish; front and middle tarsi 

 pale fulvous, brownish apically; hind tarsus fuscous, the basal 0.2 

 of its basitarsus white. 



Female: Black. Maxillary palpus pale stramineous, its basal 

 segment largely blackish; labial palpus dark brown; extreme hind 

 corner of pronotum often white or fulvous; tegula white, its hind 

 margin sometimes tinged with brown; front and middle coxae and 

 femora fulvous; front and middle trochanters light fulvous, their 

 second trochanters paler; front tibia brownish fulvous, its basal 0.15 

 paler; front tarsus light brown; middle tibia brown, its basal 0.15 pale; 



