Weevils - Entomological Society of Canada

Description. Length 2.0-2.8 mm (head excluded). Integument
Iight to dark reddish brown; pronotum usually darker. Pubescence of
eiytra bicolored; setae white or gray and light brown, to dark brown;
biown setae scattered on posterior half of elytra and forming vague
median spot; white setae scattered in small spots on posterior half of
elytra and forming vague transverse spot extending to base of
inlerstriae 6 and 7; interstriae 3-5 with basal brown spot. Frons
strongly convex; surface dull, with small shallow punctures;
interpuncture space densely reticulate. Rostrum broad, distinctly
flattened; surfac-e as on frons. Pronotum 1.5 times wfder than long,
widest at basal angles; sides weakly arcuate, converging to broadly
rounded anterior margin; disc convex, surface densely granulatepunctate;
antebasal caritta emarginate, acutely elevated, close to elytral
tur"r. Eiytra 1.3 times longer than wide; sides parallel on basal
two-thirds, broadly rounded behind; striae weakly impressed, with
moderately deep moderately large punctures; interstriae smooth,
convex, about 2.0 times wider than striae, with minute points'
Distribution. ontario, south through the eastern United states
to Florida. Ontario: Fisher Glen, Prince Edward County, Rainy River
District, Rondeau Park, and St. Catharines.
Comments. Adults of this species are larger than those of
O. saltator and may be further distinguished by the granulate pronotal
disc, by the antebasal carina on the pronotum located near the elytral
bases, and by the color pattern as described above. Nothing is known of
the habits oi biology of ttris species, except that it breeds in dead wood of
deciduous trees.
Family Nemonychidae
This small family has usually been included in curculionidae or
Attelabidae, although the larvae and adults show a distinct affinity to
Anthribidae. In Anihribidae and Nemonychidae, the larval mandible
has a molar area, which is otherwise lacking in the superfamily.
Crowson (1985) divided Nemonychidae into two families:
Nemonychidae, containing only the genus Nemonyx; and Cimberidae,
containing the remaining genera previously in Nemonychidae'
Nemonyx differs from all modern curculionoidea in that the procoxal
cavitiei are not externally closed behind and the mesonotal cavities are
not closed externally by the sterna. Moreover, Nemonyx breeds in the
flowers of the genus Delphinium (Ranunculaceae) instead of in the male
cones ofConiferae. The genus does not occur in Canada.
Kuschel (1989) shows that the traditional concept of Nemonychidae
is correct because it represents a monophyletic unit. Kuschel points out
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