Genus Uchidella Townes, 1957

Itamus Förster, 1869; 179. Type: Hemiteles (Itamus) okamotoi Uchida, 1936. Included by Uchida (1936a).

Uchidella Townes, 1957: 119. New name for Itamus.

Two species, U. longicaudata Horstmann, 1997 and U. okamotoi (Uchida, 1936), have been recorded from Japan. In this study, I describe a new species, U. toichii sp. nov., and record some distributional data of U. okamotoi below. Matsumoto (2013) recorded the U. longicaudata from Hokkaido, while this record may be based on the misidentification of Bathythrix. Japanese species can be distinguished by the following key.

Key to Japanese species of the genus Uchidella (♀)

1. Ovipositor sheath shorter than 0.6 times of hind tibia. Clypeus usually tinged with yellowish brown (Fig. 55B). Mesosoma with large reddish yellow areas (Figs 55A, C, D). .............................................. U. okamotoi (Uchida, 1936)

-. Ovipositor sheath at least slightly longer than hind tibia. Clypeus black (Fig. 56B). Mesosoma almost entirely black (Figs 56A, D, E). ............................................................................................ 2

2. Area superomedia of propodeum as long as wide (Fig. 64H). Antenna dark brown to blackish brown (Fig. 56A). T II to T V with black areas (Figs 56G, H). Hind coxa, femur, and tibia sometimes partly or entirely darkened. ................................................................. U. toichii sp. nov.

-. Area superomedia of propodeum wider than long. Antenna yellow to yellowish brown. Metasomal tergites yellow to yellowish brown except for T I. Hind coxa, femur, and tibia yellow to yellowish brown. ..................................... U. longicaudata Horstmann, 1997