Grotea

Key of the Grotea species present in Argentina (females) 1 Gena with ventroposterior angle without tooth or process (Fig. 4a).............................................. 2 - Gena with ventroposterior angle forming a conspicuous tooth or process where occipital and hypostomal carinae meet (Fig. 1c)................................................................................................ 3 2 Head with clypeus and supraclypeal area yellow. Flagellum dark-brown with flagellomeres 25–39 white (Fig. 4b). Body yellow with some dark-brown to black regions..................................................... G. gayi (Spinola) - Head with clypeus and supraclypeal area black, except for a small yellow spot on laterally. Flagellum entirely dark-brown to black. Body black with some small white lines or spots......................................... G. cortesi (Porter) 3 Propodeum with anterior transverse carina absent, area basalis open posteriorly (Fig. 1d).................. G. coca n. sp - Propodeum with anterior transverse carina present, area basalis closed posteriorly (Fig. 4c–d)........................ 4 4 Area basalis of propodeum triangular (anteriorly wide and posteriorly narrow) (Fig. 4c), anterior transverse carina absent medially; basal area brown, followed by a transverse brown line, rest of propodeum contrasting yellow................................................................................................. G. delicator (Thunberg) - Area basalis of propodeum not triangular, anterior transverse carina present and forming a soft arc from side to side (Fig 4d); propodeum white with black bands and yellow medially...................................................... 5 5 Body slender, predominantly yellow with reduced black regions. Postgenal process laterally indistinct, forming a tooth horizontally oriented to center of head (Fig. 4e). Flagellum mostly black dorsally and yellow ventrally, flagellomeres 23–30 white. Genae completely yellow......................................................... G. eburnea (Porter) - Body robust, predominantly black with reduced yellow regions. Postgenal process distinct laterally, forming a vertically oriented tooth. Flagellum mostly black dorsally and yellow ventrally, flagellomeres 23–39 white. Gena mostly yellow, partially black above................................................................. G. superba (Schmiedeknecht)