1. Females: funicular segments with longitudinal plate sensilla; metasoma without distinct petiole ... 2
- Males: funicular segments without longitudinal plate
sensilla; metasoma with distinct petiole ... 6
2. Antennal formula 11053 ...
O.
quinifuniculus Feng & Huang
- Antennal formula 11063
... 3
3 Mandible tridentate, propodeum with ridges medially
... 4
- Mandible bidentate, propodeum without ridges
... 5
4 Propodeum with two distinct sub-median longitudinal
ridges in posterior two-thirds connected to two curved ridges in
anterior third that form more or less W-like pattern; funicle with all
segments having plate sensilla ...
O. ishii Wiebes
- Propodeum only with a median ridge; funicle with first
segment without plate sensilla ...
O. gajimaru Ishii
5. Funicular segments tightly connected, and each segment
with a row of longitudinal plate sensilla extending only slightly beyond
distal margin; toruli separated by distance subequal to torulus diameter
....
O. corneri
Wiebes
- Funicular segments loosely arranged, each segment with
strong longitudinal plate sensilla extending beyond distal margin by
about half length of funicular segment; toruli separated by distance
approximately equal to one-third torulus diameter
...O.
galili Wiebes
6. Petiole wider than long, with a tooth on each side
...
7
- Petiole longer than wide, without tooth on side
...
9
7. Mandibles short, labial palpi present, antennal
toruli separated from clypeal margin by distance subequal to torulus
diameter
...
O. ishii Wiebes
- Mandibles long and falcate, labial palpi obsolete,
antennal toruli at clypeal margin ... 8
8. Maxillary palpus about twice as long as wide; malar
space about one-third as long as eye ...O.
quinifuniculus Feng & Huang
- Maxillary palpus slightly longer than wide; malar
space about half as long as eye ...
O. gajimaru
Ishii
9. Hind coxa with dorsal teeth, petiole slightly longer
than wide, unarmed; toruli separated by distance about equal to half
torulus diameter; clypeal margin with two slightly protruding lobes
...
O. galili
Wiebes
- Hind coxa unarmed; petiole approximately two times as
long as wide, with a strong acute ventral hook; toruli separated by
distance equal to torulus diameter; clypeal margin emarginate ...
O. corneri Wiebes
