Thorax and or abdomen, markings on the surface - Note, this is NOT the hair color
None, entire body black, brown, metallic or abdomen ALONE red. upperside of abdomen rarely with narrow cream - colored or dull yellowish markings along rims of segments
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Lasioglossum acuminatum, female, abdomen
Note that in this picture there are white markings, BUT these stripes come from the pale HAIRS present on this segment...the abdomen surface itself is entirely dark.