Key to Japanese species of the genus Picardiella (Female only) 1. Face entirely whitish yellow. Mesopleuron and metapleuron with a conspicuous whitish yellow stripe respectively. Hind tibia largely reddish yellow. Ovipositor sheath distinctly shorter than hind tibia. ...................................... P. rufa (Uchida, 1932) -. Face black or black with a yellow spot (Fig. 14H). Mesopleuron and metapleuron without a yellow stripe (Fig. 14F). Hind tibia largely reddish yellow or black (Fig. 14F)...........................................................................2 2. Scutellum yellow (Fig. 14G). Hind tibia reddish yellow subbasally (Fig. 14F). Face sometimes with a yellow spot (Fig. 14H). Base of T I with a conspicuous yellow area (Figs 14F, G). Ovipositor sheath slightly shorter than hind tibia. ....................... P. melanoleuca (Gravenhorst, 1829) -. Scutellum black. Hind tibia entirely black. Face entirely black. Base of T I without a conspicuous yellow area. Ovipositor sheath distinctly longer than hind tibia. ............................. P. tarsalis (Matsumura, 1912)

Published as part of Watanabe, Kyohei, 2020, Expression of green fluorescent protein defines a specific population of lamina II excitatory interneurons in the GRP :: eGFP mouse, pp. 29-66 in Bulletin of the Kanagawa Prefectural Museum (Natural Science) 49 on page 61, DOI: 10.5167/uzh-196963, http://zenodo.org/record/11266916