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A Character Analysis of a Solitary Bee, Hoplitis albifrons (Hymenoptera, Megachilidae)
Charles D. Michener
Vol. 1, No. 3 (Sep., 1947), pp. 172-185
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2405493
Page Count: 14
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The geographical variation of 30 populations of the solitary bee, Hoplitis albifrons (Kirby), is analyzed. The hair color of four selected parts of the body of females varies from prevailingly white to mostly dark. In three characters there is a general cline from dark extreme in southern California to a much lighter coloration in the northern and eastern parts of the range. The Cascadian populations, which connect the dark Californian race with the paler northern races, are extremely variable. In some areas there is polymorphism in the shape of the antennae. The role of the Pleistocene in this distribution pattern is discussed.
Evolution © 1947 Society for the Study of Evolution