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The workers and males are black with yellow markings; the queens are orange with black markings (Miller 1961). Queens are the larger specimens, in average their size is 17 mm, workers and males size 13 mm in average. Queen and workers are dimorphic. Head: malar space less than half os long as the penultimate antennal segment; occipital carina incomplete; Mesosoma: conspicuous yellow longitudinal stripes on the mesoscutum; mesopleuron with an elongate yellow spot from pronotal lobe to mid coxa; second cubital cell of forewing equal than third cubital cell. Metasoma: queens with orange fascia expanded to nearly obliterated black markings, leaving only pairs of black spots; males and workers with lateral yellow stripes of the second tergite; male aedeagus robust with distal part bilobed (Buck et al. 2008, Miller 1961, VanDyk 2003).


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© University of Alberta Museums

Source: University of Alberta Museums

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