_Specimens examined._--Total number, 138, arranged alphabetically by provinces and states and further by districts or counties from north to south except as otherwise indicated. Unless otherwise indicated specimens are in the collection of the United States National Museum. =Alberta.= St. Albert, 1; S. Edmonton, 3; Islay, 4[77]; Battle River, south of Camrose, 1[77]; Daysland, 1[77]; Moose Pass, 1; Blindman River, 2 (1[75], 1[2]); Red Deer, 3 (2[2], 1[60]); Bearberry Creek near Sundre, 1[77]; Canad. Nat. Park, N.W. Territory, 1[60]; Red Deer River, Didsbury, 1; Canmore, 1; Calgary, 11 (6[60], 2[1], 1[86]); Red Deer River, 3[2]; Little Sandhill Creek, Red Deer River, 1[77]; Waterton Lake Park, 2[77]; Sweetgrass Hills, 1[77]; Alberta, 1[14]. =Colorado.= _Yuma County_: Wray 4 (1[88], 3[74]). =Kansas.= _Rawlins County_: 7 mi. N, 3 mi. W Beardsley, 1[74]; 6 mi. S and 2 mi. E Atwood, 1[74]; 15 mi. SE Atwood, 1[74]. _Thomas County_: near Brewster, 2[93]; no locality more definite than county, 2[93]. _Trego County_, 2 (1[2]). _Cloud County_: Glasco, 1[67]. =Manitoba.= Portage la Prairie, 3[75]; Carberry, 2 (1[2], 1[1]); Carman, 1[60]; Max Lake, Turtle Mt., 1[77]. =Montana.= _Glacier County_: St. Marys Lake, 1; Blackfoot, 1: Blackfoot Agency, 1. _Blaine County_: 6 mi. east Chinook, 1[74]. _Pondera County_: 1/2 mi. SE Conrad, 1[74]. _Toole County_: Shelby Junction, 1. _Hill County_: Havre, 1. _Fergus County_: Moccasin Mts., 5 mi. NW Hilger, 1; 7 mi. NE Hilger, 1. _Rosebud County_: 3/4 mi. N Ingomar, 1. _County_ in question, Milk River, 2. =Nebraska.= _Dawes County_: Chadron, 2[35]. _Cherry County_: Kennedy, 1; no locality more definite than county, 1. _Brown County_: Long Pine, 1[68]. _Antelope County_: Neligh, 1[35]. _Adams County_: Hastings, 2[2]. _Clay County_: Inland, 4[35]. =North Dakota= (arranged by counties from west to east). _Divide County_: Crosby, 1. _Mountrail County_: Lostwood, 1. Little Missouri River, 1. _Golden Valley County_: Sentinel Butte, 1. _Billings County_: Medora, 1[60]. _McLean County_: 3 mi. W Elbowoods, 1. _Oliver County_: Ft. Clark, 2. _Morton County_: Mandan, 1. _Sioux County_: 3 mi. N Cannonball, 1. _Logan County_: 6 mi. SW Napoleon, 1. _Rolette County_: Turtle Mts., 1[76]; Fish Lake, 1. _Benson County_: Ft. Totten, 3[14]; Sully Hill Nat. Park, 1. _Ramsey County_: Devils Lake, 2. Stump Lake or Turtle Mts., 2[2]. _Nelson County_: Stump Lake, 1. _Grand County_: Larimore, 1. _Walsh County_: Grafton, 11 (4[76], 3[74], 2[2]). _Stutsman County_: Jamestown, 1. _Barnes County_: Valley City, 1. =Saskatchewan.= Wingard, 5; Osier, 2[75]; Simpson, 1[2]; Touchwood Hills, 4[7]; South arm Last Mountain Lake, 1[77]; Rush Lake (Assiniboia, N.W.T.), 2[75].