Key to the known species of Moronopelios Brailovsky, 1988

1 Antennal segments I–III black. ..................................................................................... 2

– Antennal segments I–III yellow. ................................................................................... 3

2 Posterior margin of propleura and mesopleura yellow; pronotal disk black with the following areas yellow: collar, posterolateral margins, posterior margin, and two longitudinal stripes lateral to midline (Fig. 3). .......................................... M. nigritus sp. nov.

– Posterior margin of propleura and mesopleura black: pronotal disk black with only the collar yellow (Fig. 5). ................................................ M. vespiformis Brailovsky, 1988

3 Posterior margin of propleura and mesopleura yellow; pronotal disk black with collar, posterolateral margins, posterior margin and two longitudinal stripes lateral to midline yellow (Fig. 4). ........................................................... M. polystoides Brailovsky, 1988

– Posterior margin of propleura and mesopleura black; pronotal disk black with only the collar yellow (Fig. 2). ....................................................... M. flavoantennatus sp. nov.