492 



U. S. NATIONAL MUSEUIVI BULLETIN 216 



PART 3 



Figures 277, 278. — Localities: 277 (left), Echthrus abdominalis dimidiatus; 278 (right), 



E. a. infuscus. 



Id. Echthrus abdominalis infuscus, new subspecies 



Male : Black. Cheek stramineous next to mandible, this area some- 

 times continuous with a stramineous area on lower lateral part of face; 

 lower lateral part of face and basal part of mandible ■v\^th or without 

 a stramineous spot; palpi fuscous; tegula dark brown; coxae and tro- 

 chanters black or dark piceous; legs beyond trochanters dusky fulvous, 

 the femora usually somewhat darkened basally; wings weakly 

 infuscate. 



Female: Black. Flagellum with a median whitish or light brown 

 stripe that covers about 2.5 segments; palpi and tegula fuscous; 

 coxae and trochanters blackish or piceous; legs beyond trochanters 

 and abdomen reddish brown, the basal 0.5 to 0.8 of first abdominal 

 segment black. 



Type: 9, reared from Pinus ponderosa, Bright Angel Point, North 

 Rim of Grand Canyon, Ariz., June 28, 1922, George Hofer 

 (Washington, USNM 63833). 



Paratypes: 2cf, 19, near Alpine, Ariz., May 28, 1947, H. and M. 

 Townes (Townes). d", 9, Flagstaff, Ariz., July 8, 1941, R. H. Beamer 

 (LawTence). 9, Boulder Co. at 9,500 ft., Colo., June 18 to July 19, 

 1933, J. C. Jones (St. Paul). 9, R. M. Boys Camp, Rocky Mountain 

 National Park, Colo., July 11, 1933, Helen Rodeck (St. Paul). 9, 

 Gotliic at 9,600 ft., Colo., July 20, 1929, L. O. Jackson and Mary J. 

 Brown (Washington). 9, near Nederland, 9,600 ft., Colo., July 3, 

 F. M. Carpenter (Cambridge). 9, Twin Sisters at 10,000 ft., Colo., 

 July 11, 1926, E. C. Van Dyke (San Francisco). 9, Wolf-Fall Creeks, 

 Mmeral Co., Colo., June 20, 1919 (New York). 9, Jemez Springs, 

 6,400 ft., N. Mex., June 2, 1916, John Woodgate (Ithaca), cf , 9, 

 Navajo Lake, 9,000 ft., Utah, June 17, 1940, R. M. Bohart (Townes). 



