Weevils - Entomological Society of Canada

Apion commodum Fall
Figs. 73, 74; Map 16
Apion comrnodum Fall, 1898:154 (holotype, Montana; USNM);
Kissinger 1968:84; O'Brien and Wibmer t982:21.
Description. Length 2.3-3.3 mm. Body moderately robust,
black. Pubescence consisting of white, conspicuous, moderately coarse,
sparse scales. Frons 1.1-1.3 times wider than tip of rostrum. Rostrum of
male evenly, moderately curved, l.t-1.2 times longer than pronotum;
sides, in dorsal view, expanded at antennal insertions, converging to
apical third; surface coarsely punctured. Rostrum of female slightly
curved, 1.5-1.8 times longer than pronotum; sides, in dorsal view,
slightly expanded at antennal insertions; basal two-thirds moderately
coarsely punctured; apical third finely punctured; apex shining.
Antennae inserted in basal 0.2-0.3 (male) or in basal 0.2 (female) of
rostrum. Eye moderately convex. Pronotum at base 1. 1 times wider than
long; sides broadly rounded; disc moderately strongly convex' flattened
apically and basally, with deep punctures; interpuncture spaces convex,
alutaceous. Elytra 1.4-1.5 times longer than wide; striae deeply
impressed; interstriae about twice as wide as striae, flat to slightly
convex, each interstria with 1-3 rows of frne punctures bearing fine
scales; interstria 9 with 1 long specialized seta; interstria 3 with short
setae. Tibiae in male mucronate; tibiae of forelegs with minute simple
mucro; tibiae of middle and hind legs with larger subdentate mucrones'
Distribution. Manitoba to Alberta, south to Iowa, Montana, and
North Dakota. Alberta: Scandia. Saskatchewan: Aweme, Duck Lake,
and Stony Mountain. Saskatchewan: Roche Percee.
Map 16. Collection localities of Apion cornmodum.
101