Weevils - Entomological Society of Canada

Description. Length 7.0-17.0 mm (male), 6.5-14.0 mm (female).
Integument reddish brown to black. Elytra with narrow, elongate
yellowish spots; spots often joined to form 2 or 3 transverse bars.
Pronotum about 1.4 times longer than wide, widest behind middle;base
constricted; sides broadly arcuate, strongly converging to truncate
apex; disc smooth, brightly shining, with minute, sparse punctures.
Elytra more than 2.5 times longer than wide; sides parallel on basal
two-thirds; apex broadly rounded; striae deeply impressed, with coarse
punctures; interstriae convex, about 2.0-3.0 times as wide as striae, the
interstriae smooth, with scattered finely impressed points.
Distribution. Southern Ontario and Quebec, south through
the eastern United States to northern Mexico, west to Nebraska.
Ontario: Bells Corners, Constance Bay, DeCew Falls, Dunrobin,
Hastings County, Kanata, "Kerr Lake," Kinburn, Marmora, Osgoode,
Paris, Pelee Island, Point Pelee, Prince Edward County, Rondeau
Provincial Park, South March, and Toronto. Quebec: Lac Lucerne and
Lac Taylor (not on map).
Map 11. Collection localitiee of Nanophyes canadensis (o) and' Arrhenodes minutus (o).
Comments. This species is easily recognized by the illustrations
(Fig. 4, female; Fig. 45, female; and Fig. 46, male) and cannot be
confused with any other Canadian beetle. The larva was described by
Boving and Craighead (1930). Buchanan (1960) investigated the biolory
of this species in Missouri, and his observations are probably valid for
Canada. This species is often known as the oak timberworm because of
the damage caused by the larva as it bores into the wood. The resulting
damage can degrade or even destroy the value of commercial oak stock.
Eggs are laid from mid May to mid June in wounds or other injuries that
expose the bare wood on living trees. Each egg is placed in a hole bored by
the female; each hole is nearly as deep as the length of the rostrum. No
69