Key to the Stenomorpha furcata species group

1 Pronotal disc impunctate and tuberculate, tubercles glossy, each bearing a long decumbent hair laterally; posterolateral prono- tal apices acute and slightly prolonged; Sonora, Mexico .................................... S. granicollis (Blaisdell)

- Pronotal disc finely to moderately punctate and lacking tubercles; posterolateral pronotal apices obtuse, not prolonged.... 2

2(1’) Pronotal disc and lateral margin moderately to densely clothed in erect or recurved setae; prosternum lacking tubercles..... 3

- Pronotal disc and lateral margin sparsely clothed in minute decumbent setae; prosternum tuberculate.. S. furcata (Champion)

3(2) Dorsum clothed in short erect light brown setae; tarsi with plantar surface bearing light brown spiniform setae along lateral margins, medially glabrous or nearly glabrous; Arizona and California............................ S. wickhami (Horn)

- Dorsum clothed in long blackish-brown recurved and erect setae (fig. 13); tarsi with plantar surface densely clothed in long golden-orange setae (fig. 15), lacking a glabrous medial region; Coahuila, Mexico .................... S. roosevelti, n. sp.