﻿NEARCTIC SPECIES OF GASTERUPTIIDAE — TOWNES 123 



This siibspecios occurs in the Canadian Zone of Canada and the 

 eastern United States. In British Cohimbia it intergrades with 

 G. kirhii russeus and is replaced in the Western United States by 

 this subspecies. 



lb. GASTERUPTION KIRBII RUSSEUS, new subspecies 



Abdomen with more extensive ferruginous markings than in the 

 typical subspecies, the second and third tergites being at least 60 

 percent ferruginous, and typically the abdomen from the second to 

 the base of the sixth tergites almost entirely ferruginous. The sub- 

 species is most distinct in California and Oregon, and intergrades with 

 the typical subspecies at Robson, British Columbia. Specimens from 

 Washington State and from Grand Teton National Park, Wyoming 

 belong definitely to this subspecies but average less extensively 

 ferruginous than California and Oregon specimens. 



Type: 9, Mammoth Lake, Mono County, Cahf., July 23, 1936, 

 R. M. Bohart (Townes). 



Paratypes: 7 cf, 37 9, from British Columbia (Robson); Cali- 

 fornia (Giant Forest in Tulare County, Gold Lake in Sierra County, 

 Huntington Lake in Fresno County at 7,000 feet. Mammoth, Meadow 

 Valley in Plumas County at 4,000 to 5,000 feet. Strawberry Valley 

 in El Dorado County, Summit in Placer County, Wood Creek in 

 Fresno County at 8,000 feet, and Yosemite); Colorado (Elk Creek 

 near Eraser in Grand County and Longs Peak Inn at 9,000 feet) ; 

 Idaho (Bear Pass Creek in Butte County and Warren in Idaho 

 County); Oregon (Aneroid Lake in the Blue Mountains at 7,500 

 feet, Corvallis, Grave Creek at Reuben Creek 20 miles north of 

 Granite Pass, Lick Creek Ranger Station in the Wallowa National 

 Park, Pine Creek Canyon in Baker County at 4,600 to 5,300 feet, 

 Strawberry Camp in Grant County at 5,700 feet. Strawberry Lake 

 in Grant County at 6,000 feet, and 22 miles southwest of St. Helena) ; 

 Washington (Longmire Springs on Mount Rainier at 2,500 feet); 

 and Wyoming (Grand Teton National Park). Dates of collection 

 are from May 21 to August 15. 



This subspecies occurs in the Canadian Zone of the United States 

 from the Pacific to the Continental Divide, and in southern British 

 Columbia, where it integrades with G. kirhii kirhii. 



2. GASTERUPTION ASSECTATOR (Linnaeus) 



Second segment of hind tarsus of male about 3.7 as long as deep, of 

 female about 3.0 as long as deep; eye conspicuously pubescent. 



Forewing about 5.5 mm. long; as seen from above, the hind margin 

 of head shallowly concave; eye with dense short pubescence, denser 

 in the female than in the male; fourth antennal segment about 2.5 

 as long as wide in male and about 2.7 as long as wide in the female* 



