Weevils - Entomological Society of Canada

with distinct pubescence beyond antennal insertions; punctures deep,
moderate sized, extending to tip; tip smooth, nearly glabrous' Antennae
inserted in basal 0.2-0.3 of rostrum. Eyes prominently convex.
Pronotum at base t.2_1.3 times wider than long; sides nearly parallel to
middle, arcuate to apex, with small basal flange; apex constricted; disc
moderately convex, with moderately deep punctures and short scales;
interpuncture spaces alutaceous. Elytra L.2-1.3 times longer than wide;
striae deeply impressed, with coarse punctures; interstriae about twice
as wide as striae, nearly flat, finely alutaceous, each interstria with 1 or 2
irregular rows of scales, these coarser at base of interstriae l-4
especially on 3; interstria 9 with 1 long specialized seta. Legs of male
lacking special characters.
Distribution. Central New York to southern Michigan and
North Dakota, south to Chiapas and Veracruz, Mexico. Not recorded in
Canada, but may occur in southern Ontario.
Comments. This species is in the subgenus Coelocephalapion.
Adults are distinguished from other members of the subgenus by the
scales on the femora and on the head behind the eye, which are coarser
than those on other body parts, by the prominently convex eye, by the
very sparse pubescence, by the lack ofsexual dimorphism in the shape of
the rostrum, and by the presence of a distinct basal flange on the
pronotum of the male. Larvae develop in legumes of bush-clover
(Lespedeza species), in loments of tick trefoil (Desmodium species), in
Galactia uolubilus, and in seeds of prairie-clover (Petalostemon species) .
Salsbury (1984) reports specimens from several species of Laspedeza
and Desmodiurn and from Galu.ctia uolubilus in Kansas. Kissinger
(1968) designated the neotype ofthis species.
Apion disparatum Sharp
Figs. 85, 86; Map 17
Apion disparatum Sharp, 1890:75 (Iectotype, Guatemala City,
Guatemala; British Museum) ; Kissin ger L968:223; O'Brien and Wibmer
1982:22.
Apion nasutum Fall, 1898:61 (lectotype, New Mexico; MCZ).
Description. Length 1.8-2.6 mm. Body moderately robust,
black; elytra with brassy luster; antennal segment 1, femora, centre of
tibiae, and apical two-thirds of male rostrum yellow or reddish.
Pubescence consisting of white, conspicuous, fine, sparse scales on
dorsal surface ofpronotum and elytra, these coarser and denser on base
of elytral interstria 3, on sides of mesothorax and metathorax, and on
base of male rostrum. Frons 0.9-1.2 times wider than dorsal tip of
L07