Weevils - Entomological Society of Canada

Perforations al6atoires de l'6lytre (en rang6es 6gales cependant chez
A. cassandrqd . . Auletobius Desbrochers (p' 162)
6. T6te comprim6e derridre les yeux. Article 1 du m6tatarse plus long
que les articles 2 et 3 r6unis. Elytres courts' exposant deux tergites
abdominaux et le pygidium . . . . . . Deporaus Samouellg (p. 167)
TOte non comprim6e derridre les yeux. Article 1 du m6tatarse pas
plus long que les articles 2 et 3 r6unis. Elytres n'exposant que l'apex
dupygidium ..... Haplorhynchitesyos5(p.168)
Genus Pterocolus Say
Pterocolus Say, 1831:5; Schoenherr 1833:238; Hamilton 7969:132;
O'Brien and Wibmer 1982:17.
Apotomus Kirby, 1837 :205.
This genus is represented in North America by only one species;
three additional species occur in Mexico and Central America.
Description. Body short, rounded, very robust. Pubescence
consisting of sparse hair-like setae. Rostrum very short (Fig. 145).
Mandible broad, blunt (Fig. 146). Antennae (Figs. 145, 146) inserted
immediately in front of eyes; terminal 3 segments enlarged into loose
club; scape very short, similar to segment 1 of funicle; funicle
7-segmented. Eyes oval, weakly emarginate anteriorly, moderately
conne*. Pronotum with acute lateral margin, strongly extended basal
margin, and recurved anterior margin. Elytra short; apex of each
elytron separately rounded, exposing 3 terminal abdominal tergites;
striae punctured in even rows. Mesepimeron strongly extended,
distinctly visible in front of elytral humeral angle. Procoxae and
mesocoxae small, widely separated; metacoxae transversely oblong,
widely separated.
Tytrre species. Attelabus ouatus Fabricius, monotypic.
Comments. This genus is easily distinguished from other genera
in the family by the acutely margined pronotum, by the insertion of the
antennae close to the eyes, and by the elytra, which are short, separately
rounded, and widely separated at the tips, exposing 2 abdominal tergites
and the pygidium. Other differences are summarized in the above
description.
r45