Weevils - Entomological Society of Canada

Genus Pselaphorhynchites Schlisky
Rhynchites (Pselaphorhynchites) Schilsky, 1903:40, ff. (in key).
Coenorrhinus (Pselaphorhynchites) Voss, t932:77 0.
Pselaphorhynchites : Hamilton 1969: 193 ; Hamilton 197 l:982-996;
O'Brien and Wibmer 1982:16.
This genus contains about 25 species around the world, with 14
occurring in North America north of Mexico. Two species occur in
Canada. The habits of the species in this genus are practically unknown.
Description. Body small (4 mm or less), dark, often with metallic
reflections. Vestiture inconspicuous; setae very small, fine, appressed,
white. Head more or less broadly quadrate; distance across eyes usually
as wide as or wider than base of head; surface between punctures on
head and pronotum usually with bead-like granulations. Rostrum broad
(Figs. 151, 154,155). Antennae inserted at or before middle of rostrum;
antennal club small, elongate (Figs. 150-155). Pronotum about as wide
as long, weakly constricted anteriorly; disc punctured. Elytra somewhat
swollen behind middle; striae in distinct rows, with punctures quadrate,
deeply impressed; interstriae with small setiferous punctures; a short
scutellar stria evident adjacent to scutellum. Abdomen of male weakly
concave; abdomen of female convex; at least apex of pygidium exposed.
Type species. Curculio nonus Paykull, by subsequent
designation.
Comments. Hamilton (1971) revised this genus. His paper
should be referred to for more information. Members of the genus are
distinguished by the presence of a scutellar stria, by the more or less
exposed pygidium, and by the deeply impressed strial punctures.
Key to species of Pselaphorhynchites in Canada
1. Body shiningblackwith bluish, brassy, or purplish sheen. Pygidium
largely covered by elytra, with apex exposed. Length 2.3-3.5 mm.
Nova Scotia to Alberta and Northwest Territories . . .
. . cyanellus (LeConte) (p. 153)
r52
Body shining black, without bluish sheen. Pygidium almost
completely visible, covered only at extreme base. Length 1.7-2.7
:- T'::: :1:::1':li:l :: ?"'T;io,:;,,"