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Extracted from: LaBerge W.E., (2001). Revision of the Bees of the Genus Tetraloniella in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36(3); 67-162
Tetraloniella incana is a small species of
the eriocarpi group known only from females.
These females have a yellow macula across
the apical half or third of the clypeus and
black mandibles and labrum. The female
mesoscutum and scutellum have abundant
dark brown hairs. The metasomal tergal
vestiture is pale ochraceous to ochraceous and
terga 3 and 4 do not have clearly defined apical
pale fasciae but are covered by the pale
pubescence. The metascutal and mesepisternal
punctures are relatively shallow, round, separated
by half to one or two puncture widths
posteromedially on the mesoscutum and on
lower and posterior areas of the mesepisterna.
FEMALE. Measurements and Ratios.-
N = 16; length, 9–10 mm; width, 3.0–3.5 mm;
wing length, M = 2.41±0.148 mm; hooks in
hamulus, M = 10.56±0.203; flagellar segment
1/2, M = 1.57±0.024.
Integumental Color.- Black except as
follows: mandible with apical half ferrugineous
with golden stripe unless worn; clypeus
with short subapical yellow macula; flagellar
segments 3 to 10 with lower, outer surfaces
progressively reddened, 3 dark reddish brown,
segment 10 dark brownish red; tegula piceous;
wing membranes hyaline, slightly infumate,
veins black to dark reddish brown; metasomal
tergum 1 with narrow hyaline rim, yellowish;
terga 2–4 with apical half or more of each apical
area hyaline, yellow; sterna 2–5 with narrow
apical areas hyaline, yellow; distitarsi ferruginous;
tibial spurs testaceous.
Structure.- Clypeus as in eriocarpi.
Supraclypeal area as in eriocarpi but
impunctate medially and surface dull, finely tessellate. Face above antennal fossae, vertex, and genal area sculptured as in eriocarpi.
Galea above shiny, unshagreened; maxillary
palpus 5-segmented, ratio about as
1.0:0.6:0.6:0.4:0.3. Flagellar segments as in
eriocarpi. Mesoscutum with round punctures
in anterior third and peripherally separated
mostly by half a puncture width or less,
posteromedially separated by half to one or
two puncture widths, surface shiny,
unshagreened or with weak reticular
shagreening. Scutellum along anterior third
with minute crowded punctures, posteriorly
punctures larger, separated by half a puncture
width or less, surface shiny. Mesepisternum
with punctures shallow, separated by more
than half a puncture width especially below
and posteriorly, surface weakly shagreened.
Propodeum with dorsal surface with elongate
punctures, surface dulled by fine shagreening;
posterior surface impunctate and shiny medially,
laterally with small punctures separated
by half to one puncture width, surface shiny,
unshagreened or weakly so. Metasomal tergum
1 with apical area impunctate except a
few punctures medially; basal area with small
punctures medially separated mostly by two
to three puncture widths, crowded laterally;
surface dull, finely shagreened. Tergum 2–4
with basal areas with minute crowded punctures;
interband zone with minute punctures
separated mostly by one to two puncture
widths; apical areas with punctures in basal
halves or more, but minute and obscure; surfaces
dulled by fine shagreening. Pygidial
plate and sterna as in eriocarpi.
Vestiture.- Generally ochraceous except
as follows: dorsum of thorax entirely or mostly
with brown to black hairs; vertex with abundant
dark hairs; metasomal tergum 1 with basal
area hairs long, ochraceous; terga 2–3 with
basal tomentum white, interband zone hairs
short, erect, pale, not hiding surface, apical
areas with complete apical pale fasciae; tergum
4, 5, and 6 with vestiture pale ochraceous
to ochraceous and covering surfaces; occasionally
interband zone of tergum 3 obliterated or
nearly so; sterna 2–5 with long pale ochraceous
hairs in basal areas. Scopal hairs highly plumose,
pale ochraceous; inner surface hind
basitarsi yellow.
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