ICHNEUMON-FLIES, PART 2: EPHIALTINAE 141 



10. Dolichomitus buccatus, new species 



Male: Unknown. 



Female: Front wing 11 to 15.7 mm. long; face rather wide, with 

 moderately coarse punctures that are separated by about twice their 

 diameter; temple long and swollen, about 1.0 as long as the eye, the 

 head across temples a little wider than across eye (the temple shorter 

 and not swollen to near outer tangent of eye in the other Nearctic 

 species of the Irritator group) ; flagellum unusually short, the fifth 

 segment from the end about 1.1 as long as wide; upper end of pre- 

 pectal carina fading out near level of lower 0.3 of hind margin of 

 pronotum; propodeum unusually short, weakly transversely rugulose 

 medially, with moderately coarse, weak punctures which are nearly 

 all basad of the middle; median longitudinal carinae of propodeum 

 indistinct; hind femur about 4.8 as long as deep, its front face with 

 rather sparse, small, weak punctures that are separated by about 

 three times their diameter; bristlelike hairs on middle tibia strong; 

 first tergite about 1.4 as long as wide; second tergite about 1.1 as 

 long as wide; third tergite transversely rugulose, its tubercles prom- 

 inent, the tubercles with only weak rugulosity and moderate-sized, 

 weak punctures whose interspaces are about 1.5 their diameter; ovi- 

 positor sheath about 1.45 as long as front whig; dorsal lobe of the 

 lower valve of ovipositor rather small. 



Black. Clypeus and mandible often more or less ferruginous; palpi 

 brown, the labial palpus darker ; tegula yellowish, its apicolateral edge 

 brownish; extreme hind corner of pronotum often fulvous; front and 

 middle legs fulvous, the apex of their femora in front, basal 0.12 of 

 then tibiae above, and front and upper side of front tibia, paler or 

 yellowish fulvous; hind coxa, trochanters, and femur fulvous, the 

 femur with its apex fuscous; hind tibia and tarsus fuscous, the basal 

 0.15 of the tibia stramineous. 



The strongly swollen temple is like no other Nearctic species except 

 D. cephalotes, from which it is easily distinguished by its much shorter 

 ovipositor. The European D. crassicornis also has the temple strongly 

 swollen but hi this species the prepectal carina is complete above. 



Type: 9, Steens Mts., Harney Co., Oreg., June 24, 1922, W. J. 

 Chamberlin (Washington, USNM 63690). 



Paratypes: 9, Osoyoos, B. C, May 13, 1953, J. E. H. Martin 

 (Ottawa). 9, reared from Populus tremuloides, Manitou, Colo., Feb. 

 4, 1916, H. E. Burke (Washington). 9, Steamboat Springs, Colo., 

 Aug. 5, 1948, H., M., G., D., and J. Townes (Townes). 9, Steens 

 Mts., Harney Co., Oreg., June 24, 1922, E. C. Van Dyke (San 

 Francisco). 



This is an uncommon species of the West, probably restricted to 

 the Canadian zone. 



