Einfeldia sasai Yamamoto & Yamamoto 2018

Adults:

Male: Wing length 2.34 mm, wing length/width 0.28. VR 1.03.  AR 3.0.
Head, scutal stripes and postnotum brown, scutellum and legs yellow, abdominal tergites I-V with a brown area in the middle of the posterior margin, VI-VIII largely brownish yellow.
Frontal tubercles very small, nearly circular, only 8 µm in diameter.  12 clypeal setae.
Antepronotum slightly separated (Fig. 19, below), without setae.
Thoracic setae: 23 acrostichals; 15-18 dorsocentrals, 5 prealar; 18 scutellar.
Mid Ta2-4 with 23 pseudospurs along the antero-dorsal margin, hind Ta1-4 each with 2 pseudospurs on the apical portion; mid and hind Ta1 with several sensillla chaetica.
Hypopygium as in Figs 21-22, below; analpoint (Fig. 23, below) relatively broad, not narrowed at the base, with lateral ridges with 3 setae on each side.  Superior volsella (Fig. 24, below) sickle shaped with a very high base, chitinised distal portion arising from outer side of the base.  Inferior volsella (Figs 21 & 22, below) long, finger-like, slightly expanded distally, with 28 recurved setae on it.  Gonostylus moderately swollen, reducing markedly over distal quarter.

Illustrations of E. sasai: 19 - antepronotum; 20 - tarsus with pseudospurs;
21 & 22 - dorsal hypopygium; 23 - anal point; 24 - Superior volsella.

Female, Pupa, Larva and Cytology not known.

Found: Japan - Ouike, Minamidaito, Okinawa Prefecture, Ryukyus (Type locality)

May be separated from E. pagana by the distributional pattern of the temporal setae on vertex, mid-Ta1 bearing many pseudospurs, the lunate gonostylus with dorsal 1/4 constricted, the long slender Inferior volsella and the sickle shaped Superior volsella.