Key to Nearctic species of Adota

1 Body matte. Posterior margin of male tergum 8 with three or four blunt projections (Figs. 19, 31). Median lobe of aedeagus with blunt apex (Figs. 23­24, 35­36). Spermatheca: Figs. 29­30, 40­41. Known from the Pacific coast of North America, from Alaska to California (Fig. 52) ....................................................................................... 2

– Body glossy despite isodiametric microsculpture. Posterior margin of male tergum 8 straight (Fig. 42). Median lobe of aedeagus with pointed apex (Figs. 46­47). Spermatheca: Fig. 51. Body length 2.4­2.6 mm. Known from the Gulf of California (Fig. 52) ............................................................................ 3. Ad. colpophila Gusarov, sp. n.

2 Apex of median lobe almost as wide as basal part of median lobe (Figs. 23­24). Posterior margin of male tergum 8 slightly emarginate medially (Fig. 19). Spermatheca larger (Figs. 29­30). Body length 2.5­3.2 mm ..............1. Ad. maritima (Mannerheim)

– Apex of median lobe narrower than basal part of median lobe (Figs. 35­36). Posterior margin of male tergum 8 convex medially (Fig. 31). Spermatheca smaller (Figs. 40­ 41). Body length 2.2­2.8 mm ............................................. 2. Ad. gnypetoides (Casey)