Nest structure and colony cycle of the Allegheny mound ant,Formica exsectoides Forel (Hymenoptera: Formicidae) |
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| Authors: | C M Bristow D Cappaert N J Campbell A Heise |
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| Institution: | (1) Dept. of Entomology, Michigan State University, 48824 East Lansing, MI;(2) Dept. of Biology, University of Michigan, 48109 Ann Arbor, MI;(3) Present address: 1726 Dexter, 48103 Ann Arbor, MI, USA;(4) Dept. of Biology, University of Michigan, 48109 Ann Arbor, MI;(5) Present address: USDA-Forest Service, PO Box 7669, 59807 Missoula, MT |
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| Abstract: | Summary The nest structure and colony cycle of a population of Allegheny mound ants,Formica exsectoides, were examined in central Michigan. The dispersion pattern of mounds was random. Nest structure and presence of brood were primarily determined by excavation of twenty-three nests over three intervals from June through September. Additional excavations of five nests in 1990 and ten nests in 1991 provided further details on nest structure and colony cycle. Most galleries occurred within the mound and upper 30 cm of soil, but some activity reached depths of 100 to 270 cm. Depth of nests showed little correlation with external measurements of height and diameter. Immature stages were recovered from two strata: the upper 20 cm of nest and mound and the lowest nest depths. Alate sexual forms were found in or near the mound in July, and numerous dealate queens were collected in September from peripheral galleries near the soil surface. |
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| Keywords: | Formica exsectoides nests colony cycle temperature brood reproductives |
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