﻿106 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lOO 



15a. AULACOSTETHUS OCCIDENTALIS LAVATUS, new subspecies 



Head and thorax of female less than a third blackish; legs of female 

 ferruginous, of male blackish only at the bases of the middle and hind 

 coxae. 



Type: U. S. N. M. No. 58826, 9, Sunrise, at 6,400 feet on Mount 

 Rainier, Wash., July 7, 1935, Wm. W. Baker (Washington). 



Paratypes: 16 cf, 18 9, from British Columbia (Kaslo, Midday 

 Valley at Merritt, Robson, Shawnigan, and Victoria); California 

 (Big Flat on Coffee Creek in Trinity County, Fallen Leaf, Gold Lake 

 in Sierra County, Meyers, Strawberry Valley in El Dorado County, 

 and Yosemite) ; Idaho (Priest Lake) ; Oregon (Crater Lake, Home- 

 stead Inn on Mount Hood, Lake Basin Trail near Wallowa Lake at 

 4,500 to 5,500 feet, and Wallowa Mountains in Baker County); and 

 Washington (Lake Cushman, Olympia, Red Mountain, and Mount 

 Rainier at White River Camp and at Yakima Park). Dates of col- 

 lection are rather evenly distributed from June 22 to August 13. 



This subspecies is common in the Canadian Zone of British Colum- 

 bia, Washington, Oregon, and California. 



15b. AULACOSTETHUS OCCIDENTAUS OCCIDENTALIS (Cresson). new combination 



Aulacus occidentalis Cresson, Trans. Amer. Ent. Soc, vol. 7, p. 255, 1879. Type: 

 ? , Colorado (Philadelphia). 



Head and thorax of female more than a third blackish; legs of 

 female sometimes partly blackish, of male often with more than the 

 bases of the fore and middle coxae blackish. 



Specimens. — 11 cf, 8 9, from Colorado (Ute Trail in El Paso 

 County and Waldo Canyon) ; Idaho (Centerville, Moscow, and Post 

 Falls) ; New Mexico (Beulah and Jemez Springs) ; Utah (Navajo 

 Lake at 9,000 feet and Parley Canyon near Salt Lake City) ; and 

 Wyoming (Grand Teton National Park and Riverside in Yellowstone 

 National Park). Dates of collection run from June 1 to August 4. 



This subspecies occurs in the mountains of Idaho, Wyoming, 

 Colorado, Utah, and New Mexico. 



16. AULACOSTETHUS MELLEUS (Cresson), new combination 



Aulacus melleus Cresson, Trans. Amer. Ent. Soc, vol. 7, p. 255, 1879. Type: ? , 



Nevada (Philadelphia). 

 Aulacus consors Cresson, Trans. Amer. Ent. Soc., vol. 7, p. 255, 1879. Type: 



d^, Nevada (Philadelphia). 

 Pristaulacus ferrugineus Kieffer, Bull. Soc. Hist. Nat. Metz, ser. 2, vol. 11, p. 



29, 1904. Type: ?, Nevada (?Vienna). (New synonymy.) 



Wings strongly suffused with brown; ovipositor sheath about 2.0 as 

 long as theforewing. 



Female: Forewing about 11.5 mm. long; as seen from above, 

 head about 0.75 as long as wide; top of head somewhat shining, 

 with fine rather close punctures; lateral lobe of mesoscutum weakly 



