Extracted from: Wallace E. LaBerge. 2001. Revision of the bees of the genus Tetraloniella in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36(3):67–162.|
This small species occurs from Costa Rica
north to southern Arizona. The male is distinctive
in having an entirely black clypeus,
black mandibles, and black labrum. Both
sexes have the mesoscutum with extremely
shallow, large, round punctures separated by
less than half a puncture width, with bottoms
of the punctures dulled by fine shagreening
and have the maxillary palpus 5-segmented.
The female has simple scopal hairs and distinctly
banded terga as described below.
FEMALE. Measurements and Ratios.-
N = 20; length, 8–10 mm; width, 3.0–3.5 mm;
wing length, M = 9.16±2.05 mm; hooks in
hamulus, M = 9.75±0.143; flagellar segment
1/2, M = 1.85±0.031.
Integumental Color.- Black except as
follows: mandible with reddened median band
or apical half reddened; flagellar segments 3
or 4–10 red to dark reddish brown below;
tegulae piceous; wing membranes hyaline,
veins dark brown, almost black; metasomal
terga with apical areas piceous, rims dark or
slightly and narrowly translucent; sterna similar;
distitarsi dark brown; tibial spurs yellow
to dark ochraceous.