Pterostichus is a very large genus of ground beetles with a Holarctic distribution in the subfamily Harpalinae. It has over 1,100 species. The beetles are predatory, but sometimes feed on strawberries. They can be found under rocks and prefer slightly moist, sandy soil. Pterostichus contains the following species: ...
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http://en.wikipedia.org/wiki/Pterostichus
Pterostichus is a genus of beetles of the ground beetle family, Carabidae, varying in size between 4 and 22 mm. Most species are dark in colour, often black, though some are metallic. Twenty-two species of the genus occur in Britain. One species, Pterostichus melanarius (formerly known as
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http://www.probertencyclopaedia.com/browse/BPA.HTM
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