Extracted from Western Bees obtained by the American Museum Expeditions by Cockerell (1921).
COLORADO: 89, 5ef1, ' Yray, about 3700 ft. alt., some at Helianthus, August 18,
1919; 39, 10efl, La Junta, about 4100 ft. alt., August 12, 1920. UTAH: 59, 5ef1!
Ogden, August 29-30, 1916.
One male is stylopised, and differs from normal males in having the
clypeus broadly black at sides, the supraclypeal yellow broader than
high, the dog-ear marks much shorter, the lateral face-marks and yellow
marks on scape wholly wanting. Also, the anterior and middle tibire
have the apical half black, and the sculpture of the abdomen is weaker.
The stylopid is undescribed.
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