154 U. S. NATIONAL MUSEUM BULLETIN 216 



Specimens (6d\ 329): From Alberta (Banff); British Columbia 

 (Field in the Rocky Mts., Robson, and Victoria) ; Idaho (Priest Lake) ; 

 Maine (Passadumkeag in Penobscot Co.) ; Massachusetts (Minot, 

 Mount Wachusett near Princeton, and Taunton) ; Michigan (Brevort 

 Isle Roy ale, and Midland Co.); New Brunswick (St. John); New 

 Hampshire (Mount Washington) ; New York (Ithaca, and McLean 

 Reserve in Tompkins Co.) ; North Carolina (Black Mts.) ; Ohio 

 (Hinckley in Medina Co. and Hocking Co.) ; Ontario (Sudbury) ; 

 Oregon (Corvallis, Mary's Peak, and Skillet Creek in Umpqua 

 Forest); Pennsylvania (Delaware Water Gap); Quebec (Cascapedia 

 River and Hull) ; Rhode Island (Westerly) ; South Carolina (Table 

 Rock Mt. in Greenville Co.) ; and Vermont (Laurel Lake near Jack- 

 sonville). We also have five females from several localities in 

 Germany. 



Dates of capture begin in early summer and extend well into the 

 fall. The three earliest and latest dates are: June 8 at Brevort, 

 Mich.; June 11 at Westerly, R. I.; June 17 in the Black Mts., N. C; 

 September 28 in Hocking Co., Ohio; October 3 at St. John, N. B. and 

 at Robson, B. C; and October 28 at Table Rock Mt., Greenville Co., 

 S. C. 



This is a Holarctic species. In America it is mostly in the Transi- 

 tion zone. It is adult from early summer into the fall. There are no 

 rearing records. 



18. Dolichomitus imperator (Kriechbaumer), new combination 



Figures 330,g; 333,n; 357 



Ephialtes imperator Kriechbaumer, 1854, Ent. Zeitung Stettin, vol. 15, p. 156; 2 . 



Type: 9 , Germany (? Munich). 

 Ephialtes occidentalis Cresson, 1865, Proc. Ent. Soc Philadelphia, vol. 4, p. 269; 2 . 



Type: 9 , Colorado (Philadelphia). 



Male: Front wing 8 to 13 mm. long; median longitudinal carinae 

 of propodeum ridgelike, extending more than half the length of 

 propodeum; first tergite about 2.5 as long as wide, about 1.0 as long 

 as second tergite; second tergite about 2.1 as long as wide; subgenital 

 plate as in figure 333,n; genitalia as in figure 357. 



Black. Clypeus and mandible stained with ferruginous; apical 

 margin of scape light brown in front; palpi stramineous, their basal 

 segments mostly blackish; tegula pale yellow or pale fulvous; extreme 

 hind corner of pronotum fulvous; front and middle legs light yellowish 

 fulvous, their coxae fulvous and their femora fulvous except more or 

 less of their front side and apex; hind coxa, trochanters, and femur 

 fulvous, the femur somewhat infuscate apically, its apical margin 

 paler; hind tibia and tarsus fuscous, the basal 0.15 of hind tibia 

 stramineous. 



