3 mm; head and mesosoma with bright green metallic sheen, flagellum brown, legs yellow except metacoxa brown, two basal gastral terga brown and subapical ones with greenish tinge; apical gastral tergum only slightly elongate.
9x length of gaster, usually not exserted beyond gastral apex but sometimes a little or, occasionally, notably exserted (by at most 0.
It has a large choanocyte chamber, or gastral cavity, with an osculum.
Choanocytes are flattened, but their central part projects into a gastral cavity.
3) with gaster elongate (particularly the apical gastral tergum), notably longer than mesosoma.
Head mostly yellow except eyes and ocelli dirty pink and area between posterior ocelli brown; pronotum brown dorsally, rest of metanotum shining brown with greenish metallic tinge; basal gastral segments yellow, apical segments brown; scape yellow to light brown, pedicel and anelli light brown, remainder of antennal segments slightly darker (brownish); legs mostly yellow except all apical tarsomeres brown.
At least first and second gastral
segments ferruginous (Tsuneki, 1983a: 77-79).
tergites T2-T7 with 2, 2, 2, 4, 6 and 4 setae.
Erect hairs absent, except for some few hairs in the last gastral
tergum I without punctures; terga II-IV with dense, fine punctures medially and posteriorly, impunctate basally; tergum V with dense, fine punctures; pygidial plate elongate triangle, with dense, coarse punctures, and with long, yellow bristles (Fig.
Gaster: First gastral
segment without sculpture, covered by scattered and appressed hairs.
Gaster dark yellow, along sides narrowly dark, first and sixth gastral
Richards (1978) mentioned this condition for the tergum in those two species at two places in his key, characterizing it as "First gastral
tergite with few outstanding hairs" for S.
Gaster: in dorsal view first tergite with prominent, rounded anterior corners, projecting forward from midline; first gastral
tergite and sternite each with a broad, median, basal concavity; first tergite with sparse, long, suberect, posteriorly-directed, hairs that are generally distributed; tergites 2-4 smooth, each with an irregular row of large, suberect, subapical hairs.