﻿126 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lOO 



Pentecost, St. Annes, and Seven Islands) ; Saskatchewan (Waskesiu 

 Lake) ; Tennessee (The Chimneys in Great Smoky National Park) ; 

 Utah (Salt Lake City) ; Vermont (Lake Willoughby and Rutland) ; 

 Washington (Colfax, Fishtrap Lake, Liberty Lake, Pullman, San 

 Juan Island, and Mount Rainier at 2,900 feet, at 4,700 feet, at Berke- 

 ley Park, and at Longmire) ; and Wyoming (Bridge Basin). Dates of 

 collection are mostly between June 20 and August 10, but scattering 

 records show that the species is on the wing in some localities from 

 June 1 to August 29. The only records outside this range are* April 

 30 at Oakland, Calif; May 12 at Sobre Vista, Sonoma County, Calif.; 

 May 24 at Keen Camp, Calif.; ''May" at Oaldand and in Santa Clara 

 County, Calif.; and "September" at Halfway House, Pikes Peak, 

 Colo. 



This subspecies is transcontinental in the Canadian Zone. In the 

 East it intergrades freely with the subspecies G. assectator area where- 

 ever there is mingling of the fauna of the Canadian Zone with that of 

 the Transition Zone. Series of specimens from many such locahties, 

 especially in Ontario and Quebec, must be arbitrarily assigned to one 

 of the two subspecies, or the individual specimens assigned according 

 to their individual characters. In parts of Utah the present form is 

 presumably replaced by the subspecies G. assectator utahensis. 



2b. GASTERUPTION ASSECTATOR UTAHENSIS, new subspecies 



Structurally similar to G. assectator assectator but smaller, with the 

 forewing averaging about 4.5 mm. long. 



Extensively pale ferruginous, to mostly fuscous. The most ex- 

 tensively pale specimen is fuscous only as follows: Head except apical 

 half of clypeus, scape, flagellum except on the apex and the basal two 

 segments, most of propleurum and fore coxa, central median part of 

 first tergite, median saddles on the third to sixth tergites and sternites 

 that are progressively larger and darker toward the apical segments, 

 most of the seventh and eighth segments, and ovipositor sheath. 

 The upper half of the hind tibia is dark brown except on its basal 

 0.25. The most extensively fuscous specimen (a male) is paler only 

 as follows: Apical 0.3 of clypeus, margins of pronotum, mesepimeron, 

 apical 0.35 ± of first to sixth tergites, and basal 0.12 of second to sixth 

 tergites light ferruginous; most of antenna below, mouth parts, te- 

 gula, fore and middle legs beyond coxae, hind tibia, and hind tarsus 

 pale yellowish brown, the hind tibia darker above except on its basal 

 0.2; hind trochanters and femur light brown. 



Type: 9, Woodside, Utah, September 4, 1937, G. F. Knowlton 

 and F. C. Harmston (Washington). 



Paratypes: 9, Emory County, Utah, August 10, 1921, Grace O. 

 Wiley (Townes). 7 cf, 1 9, Emory County, Utah, August 23, 1921, 

 Grace O. Wiley (St. Paul and Townes). 



