Extracted from Western Bees obtained by the American Museum Expeditions by Cockerell (1921).
COLORADO: 1 9, 'VaIden, about 8300 ft., on the sagebrush hills near town, June
17, 1920.
9 .-Length nearly 10 mm.; clear red, the antennre entirely red, the flagellum
with a fine pruinose pubescence; eyes red; mandibles bidentate, black at end; a
blackish 'V-like mark about bases of antennre, and the region between ocelli blackened;
cheeks black behind, leaving a very broad red band; third antennal joint
about as long as fourth; mesothorax with a narrow black band; middle'of metathorax
with an elongate black spot; pleura with abundant long pale hair (short scanty hair
in N. heterosticta); scutellum strongly bigibbous (so also in heterosticta); tegulro
ferru~inous, rather shining; wings dusky with the usual hyaline space; stigma dusky
reddish (smaller and narrower than in heterosticta); basal nervure going far basad of
transverse median, third submarginal cell greatly narrowed above; femora marked
with black beneath at base; inner face of hind basitarsi with very pale hair; first
abdominal segment with a round black spot on each side near base; second with
small yellow spots, the rest without yellow; first ventral with a blackish shade, but
no well-defined mark.
The first ventral segment and other characters readily distinguish
it from N. grayi.
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