Myrmosinae, Fox, 1894

Williams, Kevin A., Lelej, Arkady S. & Thaochan, Narit, 2019, New species of Myrmosinae (Hymenoptera: Mutillidae) from Southeastern Asia, Zootaxa 4656 (3), pp. 525-534 : 529-530

Key to the extant Old-World genera of Myrmosinae

Males (unknown in Nothomyrmosa )

............................................................................ Kudakrumia Krombein, 1979

- Hypopygium (S8) with lateral lobes or processes. Metasomal terga basally constricted. (Tribe Myrmosini ).............. 2

2. T7 laterally without preapical tooth....................................................................... 3

- T7 laterally with preapical tooth.......................................................................... 6

3. T7 without longitudinal rounded fovea and rounded apically. Inner border of mandible with two preapical teeth, subbasal tooth from base not widened. Metasomal sternum 2 basally without median tubercle. Eight Palaearctic species, unknown in Oriental Region ....................................................................... Paramyrmosa Saussure, 1880

- T7 with longitudinal rounded fovea and more or less emarginated apically. Inner border of mandible with three preapical teeth, subbasal tooth widened. Metasomal sternum 2 basally with median tubercle....................................... 4

4. Legs black. Metasomal terga black with rare black setae on posterior border....................................... 5

- Legs except coxae red. T1–4 with ivory cuticular band and fringe of dense pale setae on posterior border. One Palaearctic species C. gussakovskiji Lelej from Tajikistan........................................... Carinomyrmosa Lelej, 1981

5. S1 with two large deep pits. Three Palaearctic species and one Oriental species T. cara Lelej from China: Taiwan.......................................................................................... Taimyrmosa Lelej, 2005

- S1 without two large deep pits. Two Palaearctic species, unknown in Oriental Region ............ Myrmosa Latreille, 1797

6. Hypopygium (S8) with process between lateral process and medial lobe. Mesosoma usually partly rufous............................................................................................... Krombeinella Pate, 1947

- Hypopygium (S8) without process between lateral process and medial lobe. Mesosoma black. One Palaeaerctic and one Oriental species E. burmanensis Lelej from Myanmar......................................... Erimyrmosa Lelej, 1984

Females (unknown in Erimyrmosa )

1. Ocelli lacking. Clypeus basally without any medial tubercle or carina. (Tribe Kudakrumiini ).......................... 2

- Ocelli developed. Clypeus basally with medial tubercle or longitudinal carina. (Tribe Myrmosini )..................... 3

2. Distance between posterior eye margin and posterior vertex margin equal to longitudinal eye diameter; eye microsetae very short scarcely visible under high magnification. One Oriental species K. mirabilis Krombein from Sri Lanka, India: Kerala .............................................................................. Kudakrumia Krombein, 1979

- Distance between posterior eye margin and posterior vertex margin more than two times shorter than longitudinal eye diameter; eye microsetae long, easily visible. One Oriental species N. microsoma (Brothers) from India: Orissa .............................................................................................. Nothomyrmosa Krombein, 1979

3. S1 with two large deep pits........................................................... Taimyrmosa Lelej, 2005

- S1 without two large deep pits........................................................................... 4

4. T1 with longitudinal lateral carina. Pronotum elongated. One Palaearctic species C. gussakovskiji Lelej from Tajikistan.................................................................................. Carinomyrmosa Lelej, 1981

- T1 without longitudinal lateral carina. Pronotum not elongated................................................. 5

5. F3 angulate anteriorly.......................................................... Paramyrmosa Saussure, 1880

- F3 cylindrical........................................................................................ 6

6. Head behind eyes not elongated, with convergent sides. F1 equal to F2 or shorter than it. T1 with brownish-red cuticular band................................................................................ Myrmosa Latreille, 1797

- Head behind the eyes elongated with more or less parallel sides. F1 slightly longer than F2. T1 usually with ivory cuticular band............................................................................ Krombeinella Pate, 1947