montana Steyskal, 1954b: 534,

figs. 1, 32–33, 39 (♂ terminalia, hypandrial process, ♀ sternites)

HT: ♂ United States, California, Marin Co., Paradise Cove, 21.VII.[1946], E.L. Kessel. CAS, No. 11999

AT: ♀ United States, California, Marin Co., Paradise Cove, 20.VII.[1946], E.L. Kessel

PT: ♂ ♀ numbers not given, 14, 19, 27.VII.1946, 24.IV.1947. 20.I–20.XI, from Canada: British Columbia (three localities), Saskatchewan (one locality). United States: California (13 localities), Idaho (two localities), Nevada (one locality), Oregon (one locality), Utah (one locality), Washington (two localities). In CAS, CNC, and USNM.

DIST: MEXICO (Baja California: Cañón Guadalupe; Jalisco: San José del Castillo; Sonora; Tamaulipas: Victoria).Also CANADA (Alberta, British Columbia, Saskatchewan) and UNITED STATES (Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oregon, Texas, Utah, Washington, Wyoming). Map: Valley & Berg 1977

FIGS: Fisher & Orth 1983 (♂ habitus, head, ♂ terminalia, hypandrial process; ♀ sternites of three “forms”), Orth 1991 (hypandrial process)

BIOL: Mc Donnell et al. 2007. BG: 11; PG: 6?

HOSTS/PREY OF LARVAE: Lymnaea sp.

IMMATS: Fisher & Orth 1983 (L3)

Note: “Fisher & Orth (1983) consider D. montana a polytypic species which can be separated into four forms by differences in size, male and female terminalia, and, often, by patterns of distribution” (Orth 1991)