. Brigham Young University science bulletin. Biology -- Periodicals. 186. Fig. 247. Tropidosteptes populi Kngt, 5 . Irbisia nigripcs Knight Jrbisia nigripes Knight, 1925:94. This species is known from Idaho, Montana, and Alberta, Canada. Genus Capsus Fabricius Capsus ater (Linnaeus) Fig. 246 Cimex ater Linnaeus, 1758:447. Capsus ater Fabricius, 1803:241. Capsus ater Van Duzee, 1917:337. Capsus ater Knight, 1941:138. Commonly known from Alberta, Canada, and in Washington, Oregon, California, Idaho, Montana, Wyoming and eastward in the United States. Host plants: Canada bluegrass (Poa com- press
. Brigham Young University science bulletin. Biology -- Periodicals. 186. Fig. 247. Tropidosteptes populi Kngt, 5 . Irbisia nigripcs Knight Jrbisia nigripes Knight, 1925:94. This species is known from Idaho, Montana, and Alberta, Canada. Genus Capsus Fabricius Capsus ater (Linnaeus) Fig. 246 Cimex ater Linnaeus, 1758:447. Capsus ater Fabricius, 1803:241. Capsus ater Van Duzee, 1917:337. Capsus ater Knight, 1941:138. Commonly known from Alberta, Canada, and in Washington, Oregon, California, Idaho, Montana, Wyoming and eastward in the United States. Host plants: Canada bluegrass (Poa com- pressa), couch grass (Agropyron repens) and occasionally other grasses such as timothy (Phleum pratense). Genus Polymerus Hahn Polymerus relativus Knight Polymerus relativus Knight, 1926:165. Very similar to diffusus (Uhler), but differs in the larger size and shorter rostrum which does not attain posterior margin of mesosternum. Bhigham Young University Science Bulletin Records from the Nevada Test Site: Area 18M, 3d" 10 9 June 20, 1965, taken on Chryso- thamnus nauseosus; Area 401M, Id 15 9 June 18, 1965, taken on Chrysothamnus nauseosus. Other records: 9cf 7 9 July 12, 1965, Wells, Nevada (H. H. Knight), taken on Chrysotham- nus nauseosus. 5d 19 June 29, 1965, Scipio, Utah (H. H. Knight), taken on Chrysothamnus. The preferred host appears to be Chrysotham- nus nauseosus. Polymerus diffusus (Uhler) Poeciloscytus diffusus Uhler, 1872:415. Polymerus diffusus Knight, 1926:165. Known from Arizona, California, Utah, Colo- rado, New Mexico, Idaho, Oregon, Washington, and British Columbia. Records for Nevada: 2cf 3 9 June 8, 1966, Goldfield; 2d" June 7, 1966, Tonopah, Nye County (W. Gagne): Ormsby County (C. F. Baker). Genus Tropidosteptes Uhler Tropidosteptes vittifrons (Knight) Neoborus vittifrons Knight, 1929:5. This species is common in Arizona, breeding on Fraxinus Please note that these images are extracted from scanned page images that may have been digitall
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