Beetles Identification Guide

Sexual dimorphism: Males have 2 exposed abdominal terga, females only 1 (as in
Fig. 255).
Distribution: Exclusively North American. In Canada the species has
been reported in Nova Scotia, Quebec west to British Columbia, and the
Northwest Territories.
Economic importance: As discussed for the family.
Anthicus floralis (Linnaeus) 7 narrownecked grain beetle
Diagnosis: The species is distinctive among the North American species of
Anthicus in having the mesosternum broadly expanded, with the lateral margins
fringed with setae appressed to the mesepisternum. Otherwise, the adults are
quite similar to A. formicarius except that they have a pair of small median
protuberances on the anterior fourth.
Sexual dimorphism: Males have 2 exposed abdominal terga, females only 1 (as in
Fig. 255).
Distribution: Cosmopolitan. In Canada the species has been found from Quebec
west to British Columbia.
Economic importance: As mentioned for the family. This species is the world’s
most commonly reported anthicid associated with stored products.
Anthicus formicarius (Goeze) 7
Diagnosis: The species is similar to A. floralis but differs in that it has no median
protuberances on the pronotum and has the mesosternum with the lateral margins
almost straight and lacking a fringe of appressed setae. This species has very
short setae on the dorsum of the body, as in A. floralis.
Sexual dimorphism: Males have 2 exposed abdominal terga, females only 1 (as in
Fig. 255).
Distribution: Cosmopolitan, but apparently less abundant than A. floralis (Werner
l964). In Canada the species is known from Quebec west to British Columbia.
Economic importance: As discussed for the family.
Anthicus hastatus Casey
Diagnosis: The species differs from the other Anthicus dealt with here by the
7 In the European literature, A. floralis and A. formicarius are
usually placed in the genus Omonadus Mulsant & Rey.
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