Dirrhagofarsus, Fleutiaux. Further, 1935

Otto, Robert L., 2022, A new species and new records for two other exotic species of Dirrhagofarsus Fleutiaux, 1935 (Coleoptera: Eucnemidae: Melasinae: Dirhagini) in the United States, Insecta Mundi 2022 (932), pp. 1-15 : 5

Key to the species of Dirrhagofarsus in the Nearctic region

1. Elytra with simple apices at lateral view........................................................ 2

— Elytra with convex, protruding apices at lateral view............................ D. lewisi (Fleutiaux)

2. Frons with pair of strongly-developed longitudinal carinae near compound eyes; microcombs present on longitudinal carinae ( Fig. 11 )............................................................. 3

— Frons with pair of poorly-developed longitudinal carinae near compound eyes; microcombs absent on longitudinal carinae ( Fig. 12 )........................................... D. unicolor (Hisamatsu)

3. Longitudinal carinae positioned a distance of six eye facets from the compound eyes ( Fig. 13 )........ 4

— Longitudinal carinae positioned a distance of three eye facets from the compound eyes ( Fig. 14 )............................................................................. D. brevis Otto , sp. nov.

4. Elytral striae largely absent but present only at humeri and apices; frons without medio-longitudinal carina....................................................... D. ernae Otto, Muona and McClarin

— Elytral striae indistinctly indicated throughout; frons with variably weak medio-longitudinal carina........................................................................ D. modestus (Fleutiaux)

Figures

Figures 11–14. Dirrhagofarsus species, frontal carina. 11) Dirrhagofarsus modestus (Fleutiaux). 12) Dirrhagofarsus unicolor (Hisamatsu). 13) Dirrhagofarsus ernae Otto, Muona and McClarin. 14) Dirrhagofarsus brevis Otto, new species.