Friese (1916) described Parapsaenythia flavescens, changing the name to P. argentina. This species is a Colletidae, Paracolletini and belongs in Eulonchopria Brèthes, 1909, and a new combination Eulonchopria flavescens (Friese, 1916) is proposed. The second species apparently was not described: it is a Panurgini and here described as Friesina carinulata gen.n. and sp.n.. At Berlin Museum Psaenythia bernardinensis syn.n., decribed by Strand (1910), from Paraguay, is the male of' Eulonchropiaparaguayen-sis Brèthes, 1909, syn.n.
Eulonchopria; Paracolletini; Friesina; Panurgini; Costa Rica; Psaenythia bernardinensis; Eulonchopria psaenythiodes