1 Ten flagellomeres; six metasomal segments; females.................................................................................................. 2
- Eleven flagellomeres; seven metasomal segments; males............................................................................................ 4
2 Head, mesosoma and metasoma brown; wing membrane amber-tinted; body length over 25 mm ... insularis F. Smith
- Head, mesosoma and metasoma blackish or blackish and red, often with whitish spots; body length less than 15 mm...................................................................................................................................................................................... 3
3 Metasoma red, terga II and III without whitish lateral spots........................................................ dimidiata Bartalucci
- Metasoma black to dark brown, with whitish lateral spots on terga II and III........................... madecassa Krombein
4 Metasomal sterna II and III with large spoon-like ventral projections (Fig. 4); flagellomeres with ovoid tyloids on VI–XI (Fig. 4) and large ovoid flat patch on V–X; metasoma with extensive yellow markings................................... ................................................................................................................................ hallucigenia Kimsey, new species
- Metasomal sterna II and III unmodified, without projections; flagellomeres absent or present on VI–X or VII–XI; metasoma without yellow markings............................................................................................................................. 5
5 Body length 17–20 mm; wings dark amber-tinted; flagellomeres without tyloids; tegula brown..... insularis F. Smith
- Body length 11 mm or less; wings untinted; three or more flagellomeres with tyloids; tegula white......................... 7
6 Flagellomere XI less than 2.2 x as long as broad.......................................................................................................... 7
- Flagellomere XI more than 2.4 x as long as broad...................................................................................................... 10
7 Flagellomere VIII without tyloid; clypeus entirely white, evenly convex with narrow ventrally facing flattened sur- face.............................................................................................................................................. micromeria Bartalucci
- Flagellomere VIII with tyloid; clypeus variously colored, without ventrally facing flattened surface........................ 8
8 Flagellomere VII with small, ovoid tyloid............................................................... nigrimacula Kimsey, new species
- Flagellomere VII without tyloid................................................................................................................................... 9
9 Volsella broadest dorsally, dorsal lobe oriented horizontally (Fig. 34); paramere apex whitish...................................................................................................................................................................... toliaraensis Kimsey, new species
- Volsella broadest submedially, dorsal lobe oriented diagonally (Fig. 25); paramere apex brown................................. ....................................................................................................................................... castanea Kimsey, new species
10 Paramere apex white; flagellum strongly bicolored brown to black dorsally and yellow ventrally; digitus extending diagonally to horizontally toward paramere in lateral view....................................................................................... 11
- Paramere apex brown; flagellum brown to black, may be slightly paler ventrally; digitus extending diagonally toward paramere in lateral view.................................................................................................................................. 12
11 Volsella broadest dorsally, digitus horizontally oriented in lateral view (Fig. 20); clypeus gently convex medially, entirely white or less commonly bicolored, black and white............................. mahajangaensis Kimsey, new species
- Volsella narrowed dorsally, digitus oriented obliquely in lateral view (Fig. 22); clypeus flattened medially, entirely brown or bicolored brown and black................................................................... namorokaensis Kimsey, new species
12 Flagellomere XI 2.3–2.4 x as long as broad; digitus horizontally oriented in lateral view (Fig. 16)......................................................................................................................................................................... fisheri Kimsey, new species
- Flagellomere XI 2.6 –3.0x as long as broad; digitus diagonally to vertically oriented in lateral view (Fig. 18)............ .................................................................................................................................... harinhalai Kimsey, new species