Thereva utahensis Hardy 1938

Thereva utahensis Hardy Specimens examined (19). BC: Alexis Creek, Bull Canyon; Fernie, 10.7 miles W; Kinbasket Reservoir, Bush Arm; Osoyoos, Mount Kobau Road; Robson. YT: Alaska Highway, Christmas Creek, km 1688; Caribou Mountain; Carmacks; Klondike Highway, Moose Creek; Kluane National Park, Sheep Mountain; Minto; Nares Mountain (Fig. 19); Whitehorse, Riverdale; White Pass, Log Cabin. DEBU, RBCM, ROME. Database and literature records (71). BC: Atlin; Grand Forks; Hudson’s Hope; Kamloops; Keremeos; Lillooet; Merritt, Midday Valley; Mount Revelstoke; Osoyoos; Robson; Seton Lake; Taylor; Telegraph Creek. YT: Alaska Highway, 13.1 km W Takhini River; Carcross; Christmas Creek, km 1688 Alaska Highway; Kluane Lake, Emerald Island; Kluane National Park, Mount Wallace; Kluane National Park, Sheep Creek Road; Kluane National Park, Sheep Mountain; Ross River; Stewart Crossing; Takhini; Tatchun Lake; Whitehorse. CASC, CNCI, LEMQ, MEI, SEM. Conservation status. BC: S5. Yukon: S3S5 Distributional notes. Thereva utahensis is widespread in the British Columbia interior from the United States border north to Atlin and the Peace River region. It is common in the central and southern parts of the Yukon from Kluane Lake east to Carcross and Ross River, and north to the Stewart Crossing region. The species is probably distributed farther east based on locations in the British Columbia Peace River region. Ecoprovinces and other designations. BC: Southern Interior, Southern Interior Mountains, Central Interior, Boreal Plains, Northern Boreal Mountains, YT: Boreal Cordillera. Range. Cordilleran. Yukon, British Columbia, and Alberta south to California, Utah, and Colorado (Webb et al. 2013). Biological notes. Flight period: 4 June–26 September. Thereva utahensis lives in various habitats, including sand dunes (Fig. 15), grasslands (Fig. 19), and subalpine environments (Fig. 17).