A review of the Nearctic species of Nematodes (Coleoptera: Eucnemidae: Macraulacinae: Nematodini) with a description of one new species Author Otto, Robert L. W 4806 Chrissie Circle Shawano, WI 54166 text Insecta Mundi 2021 2021-08-27 2021 881 1 19 journal article 10.5281/zenodo.5352354 1942-1354 5352354 A6DE8E5B-98F9-4F31-BE36-E84EC1DB596F Key to the species of Nematodes in the Nearctic region 1. Femoral ridge well-developed, elongate, at least 1/2 the length of the hypomeral base................ 2 — Femoral ridge poorly-developed, short, about 1/3 the length of the hypomeral base ( Fig. 1 )............................................................................ N. collaris Bonvouloir 2. Femoral ridge incomplete, not reaching to the lateral side of the pronotum...................... 3 — Femoral ridge complete, reaching to the lateral side of the pronotum ( Fig. 2 )... N. humphreyi Muona 3. Femoral ridge reaching about 1/2 the length of the hypomeral base ( Fig. 3 ).......... N. atropos (Say) — Femoral ridge reaching close to the lateral side of the pronotum ( Fig. 4, 5 )........................ 4 4. Antennomere V sub-equal to antennomere VI........................... N. penetrans (LeConte) — Antennomere V shorter than antennomere VI....................... N. rugosipennis Otto sp. nov.