Extracted from: Cockerell T.D.A. (1919). The Bees of the Rocky Mountain National Park (Hymenop.). Entomological News Vol. 30.
Female. Length nearly 9 mm.; head, thorax and legs ferruginous, marked with black, the only yellow being a spot on each side near apex of metathorax; head broad; eyes very dark reddish; mandibles simple; disc of dypeus extremely finely punctured; lower middle of front, region of ocelli, and cheeks posteriorly, black; antennae red above and below; third joint fully as long as fourth, perhaps a little longer; mesothorax closely punctured, with a single median black band; meta-thorax with a broad median black band; mesopleura red, but sides of thorax black anteriorly and posteriorly; tegulae yellowish-ferruginous; wings dusky, with the usual hyaline area: stigma clear ferruginous, nervures fuscous; basal nervures going a short distance basad of transversomedial; second suhmarginal cell verv large, receiving recurrent nervure in middle; legs red, for'e and - middle femora with a large black basal spot beneath, hind coxae black behind except at apex, hind femora rather extensively blackened at base and behind: abdomen red, shining, the first segment with more than basal half black, and four minute obscure yellowish spots along the margin of the black; apex of first segment, and second and third SUbapically,with blackish bands; second and third segments with very broad but broadly interrupted bright yellow bands; fourth with an entire band deeply emarginate posteriorly at sides; fifth with a band interrupted on each side, leaving a round lateral yellow spot; margin of fifth with a band of dense silvery white tomentum; pygidial plate very large, thinly hairy; venter red without yellow markings.
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