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The black species of weak-veined Lasioglossum (or Hemihalictus series) in eastern North America are revised to clarify their… Expand Evolutionary transitions to dim-light foraging (predawn matinal, crepuscular, nocturnal) have occurred repeatedly in bees, and… Expand SummaryEleven behavioural characteristics of eight species of the subgenus Evylaeus were analysed using principal components… Expand SummaryThe partially bivoltine, primitively eusocial sweat bee Halictus rubicundus produces two female castes, gynes and non… Expand Abstract The evolution of sociality in insects holds a central place in evolutionary theory. By examining the phylogenetic… Expand We investigated higher-level phylogenetic relationships within the genus Halictus based on parsimony and maximum likelihood (ML… Expand Abstract In the subalpine region of the Rocky Mountains of Colorado, United States, Halictus rubicundus has a solitary life cycle… Expand Lasioglossum zephyrum is a primitively eusocial bee, which nests in small colonies of up to 20 individuals. The nests occur in… Expand McGinley, Ronald J. Studies of Halictinae (Apoidea: Halictidae), I: Revision of New World Lasioglossum Curtis. Smithsonian… Expand ........... 292 292 292 293 302 303 J :-.:TRODUCTION ...... . CoNVERGE:\"T FEATURES… Expand