518 U. S. NATIONAL MUSEUM BULLETIN 216 parts 



5. Helcostizus albator (Thunberg) 



Front wing of male 3.5 to 6.4 mm. long, of female 5.0 to 8.5 mm. 

 long; body stout; propodeum about 0.83 as long as wide, its apical 0.4 

 somewhat flattened and more steeply declivous; ninth tergite of female, 

 as seen from above, about 0.9 as long as wide; ovipositor about 0.50 as 

 long as front wing. 



This species has four subspecies, one in Europe, one in north- 

 western North America, one in western United States and southern 

 British Columbia, and one in eastern North America. These differ in 

 color and in the male tyloids. 



Intergradcs between the subspecies yukonensis and rufiscutum, both 

 in coloration and in the male tyloids, are very common. The inter- 

 grades at hand are not recorded under either of the subspecies, so are 

 listed as follows: 2cf, reared from Pinus contorta tip infested with 

 Pissodes, Mile 8 of High Divide Trail, Alta., Mar. 2, 1942 (Ottawa). 

 9, reared from cerambycid burrow, Wellington, B.C., May 20, 1945, 

 K. Guppy (Townes). 29, Wellmgton, B.C., May 20 and 24, 1948, R. 

 Guppy (Townes). cf. Alum Rock Park, Santa Clara Co., Calif., 

 Mar. 24, 1949, P. D. Hurd (Berkeley). 9, Crescent City, Calif., 

 Aug. 3, 1940, H. and M. Townes (Townes). 9, Eureka, Calif., May 24, 

 H. S. Barber (Washington), cf, reared from Callidium sp., Stanford 

 University, Cahf., Nov. 4, 1914, F. M. Trimble (Washington). &, 

 Poudre Lake, Rocky Mountain National Park, 11,000 ft., H., G., and 

 D. Townes (Townes). c^, Houser Lake, Idaho, May 24, 1925, A. L. 

 Melander (Cambridge). 9, Onah, Man., June 4, 1924, R. M. White 

 (Ottawa), cf , Avalanche Lake, Glacier National Park, Mont., July 

 14, 1935, A. L. Alelander (Cambridge), cf, Eugene, Oreg., Apr. 24, 

 1929, H. A. Scullen (Corvallis). 9, Hood River, Oreg., Oct. 4, 1929, 

 D. G. Gillespie (Washington). 



The subspecies may be distinguished by the following key : 



1. Basal 0.15 ± of hind tibia white or stramineous, much paler than the rest of the 



tibia; range: east of Rocky Mountains. 



5d. albator canadensis (Provancher) 



Basal 0.15 of hind tibia approximately concolorous with the rest of the tibia, 



not conspicuously paler 2 



2. Male tyloids occurring on about five segments as obliquely longitudinal ridges; 



front and middle coxae of female whitish ; flagellum of female without a white 

 band; thorax usually with fulvous areas; range: British Columbia to Arizona. 



5c. albator rufiscutum Cushman 

 Male tyloids occurring on 7 or more segments as sharply raised, short ridges, 

 that in profile appear more or less triangular; front and middle coxae of 

 female fulvous; flagellum of female with a narrow white band; thorax usu- 

 ally without fulvous areas 3 



3. Hind femur entirely fulvous, without an apical infuscation; male tyloids on 



about 7 segments, the profile of basal tyloids truncate; range: Europe. 



5a. albator albator (Thunberg) 



