Eubulus Kirsch, 1869

Anderson, Robert S., 2008, A Review Of The Genus Eubulus Kirsch 1869 In The United States And Canada (Curculionidae: Cryptorhynchinae), The Coleopterists Bulletin 62 (2), pp. 287-296 : 288-289

Key to species of Eubulus Kirsch in the United States and Canada

1. Size larger (4.8–6.5 mm); frons foveate; eyes separated by almost width of base of rostrum in frontal view; area above each eye with oblique subcarinate ridge; femora each with two distinct teeth on inner margin, basal (proximal) tooth low and rounded................................... E. parochus (Herbst)

19. Size smaller (2.8–4.9 mm); frons not foveate; eyes separated by half to almost width of base of rostrum in frontal view; oblique subcarinate ridge above each eye very low or lacking; femora each with two small indistinct teeth on inner margin, hind femora only with small single tooth, or margin simple, lacking tooth..................................................................... 2

2. Pronotum with median tuft of suberect to erect broad scales (may be abraded); eyes separated by about two-thirds to almost width of rostrum at base; femora each with two very small, indistinct teeth on inner margin; male first ventrite longitudinally concave medially, last ventrite of both sexes with uniformly appressed, broad scales, scales lighter in color laterally on ventrites 3–5; aedeagus subparallel throughout basal one half of length, internal sac with no obvious denticles; tergite VIII of female broadly rounded, apical margin finely dentate........................................ E. bisignatus (Say)

29. Pronotum lacking median tuft of suberect or erect broad scales; eyes separated by about half width of rostrum at base, eyes slightly converging dorsally; front and middle femora each lacking teeth along inner margin, hind femora with single small tooth; male first ventrite uniformly convex, ventrite 5 with fine, golden, bifid scales each directed towards middle of posterior margin; females with all ventrites with broad appressed scales uniform in form and color; aedeagus constricted near base, internal sac with dentate longitudinal fold throughout length; tergite VIII of female narrowed, apical margin with 4 large denticles.................. E. obliquefasciatus (Boheman)