Weevils - Entomological Society of Canada

slightly expanded at antennal insertion, parallel on apical third; surface
finely punctured and coarsely alutaceous to near apex; setae minute,
uniform. Antennae inserted in basal 0.2-0.3 of rostrum. Eyes
prominent. Pronotum as wide as long at base, narrower at middle than
at base; sides expanded at base, slightly converging beyond middle, and
then rounded to strongly constricted apex; disc slightly arcuate, deeply
punctured; interpuncture spaces irregular, nearly flat, finely
alutaceous. Elytra I.2-I.4 times longer than wide; striae deep, with
moderately coarse punctures; interstriae slightly convex, each usually
with 1 row of minute, very fine setae; interstria 9 with 1 specialized seta.
Male legs unarmed.
Distribution. Ontario, south through the eastern United States,
possibly to southern Mexico. Ontario: Northumberland and Prince
Edward County.
Comments. This species belongs in the subgenus
Coelocephalapion and, is distinguished by the lack of marked sexual
dimorphism in the rostrum and by the equal coarseness of setae on the
area behind the eyes, on the femora, and on the antennae. Nothing is
known of its life history or biolory. One specimen in the Museum of
Natural History in Washington, D.C., bears the host lab elof Desmodium
sp. (tick trefoil); the record needs to be confirmed. Kissinger (1968)
designated the lectotype ofthis species.
Apion exfensum Smith
Figs. 89, 90
Apion extensum Smith, 1884:61 (lectotype, Montana; USNM);
Kissinger 1968:218; O'Brien and Wibmer 1982:23.
Description. Length L.8-2.2 mm. Body moderately slender,
black; antennae with lighter bases. Pubescence consisting of white,
dense, coarse scales, these denser on metepisternum. Frons 1.2 times as
wide as dorsal tip of rostrum. Rostrum of male moderately curved,
1.2 times longer than pronotum; sides, in dorsal view, nearly parallel on
apical half, expanded at antennal insertion; surface coarsely alutaceous,
smoother at apex; lateral areas with coarse, deep, dense punctures, these
sparser and finer apically; pubescence at base ofrostrum consisting of
sparse scales, these minute beyond antennal insertion. Rostrum of
female slightly curved, about 1.5-1.7 times longer than pronotum,
otherwise as described for A. contusum. Antennae inserted at basal
quarter of rostrum. Eyes moderately convex. Pronotum as long as wide
at base, lacking basal flange; sides slightly diverging in basal half; apex
moderately constricted; disc slightly convex, with deep punctures;
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