Extracted from Western Bees obtained by the American Museum Expeditions by Cockerell (1921).
COLORADO: 19, Ouray, about 8500 ft. alt., among oak and Pselldoisuga, July
12, 1919; 1 9, Tennessee Pass, about 10,500 ft. alt., August 7, 1920; 19, Leadville,
about 10,300 ft. alt., August 3, 1919, collected by Pearce Bailey, Jr.
The type of packardiella, from Boulder, has the fourth and fifth
aodominal segments each with a pair of yellow spots. The Ouray specimen
has the spots faintly indicated on the fifth segment, but in those
from above 10,000 ft. they have entirely disappeared, though the lateral
spots on second and third segments remain. Contrary to expectation,
the antennre of these high-altitude forms are of a clearer red than those
of the type.
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