Andrena sentence example

andrena
  • The " tongue," for example, is short and obtuse or emarginate in Colletes and Prosopis, while in all other bees it is pointed at the tip. But in Andrena and its allies it is comparatively short, while in the higher genera, such as A pis and Bombus, it is elongate and flexible, forming a most elaborate and perfect organ for taking liquid food.
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  • The tongue is bifid at the tip in a few genera; usually it is pointed and varies greatly in length, being comparatively short in Andrena, long in the humble-bees(Bombus), and longest in Euglossa, a tropical American genus of solitary bees.
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  • Many - like the common "solitary" bees Halictus and Andrena - burrow in the ground; the holes of species of Andrena are commonly seen in springtime opening on sandy banks, grassy lawns or gravel paths.
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  • The leaf-cutter bees (Megachile) - which differ from Andrena and Halictus and agree with Osmia, Apis and Bombus in having elongate tongues - cut neat circular disks from leaves, using them for lining the cells of their underground nests.
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  • The nests of Andrena, for example, are haunted by the black and yellow species of Nomada, whose females lay their eggs in the food provided for the larva of the Andrena.
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  • If the species of Nomada attack the species of Andrena too much, it brings about the destruction of its own species more certainly than that of the Andrena."
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