Plecia aff. gibbosa (Fig. 5C, 6E)

Material examined. Cerro Largo: arroyo Sarandí de Barceló, 32º26’26”S, 53º36’46”W, 2♂, 2♀, 27-28-xi-2022, W.S. Serra, G. Sanguinetti, M. Caligari, E. Caligari, M. García, G. Nuñez leg., S.J. Fitzgerald det. (MNHN 2588) ; Montevideo: 6♂, 4-xii-1960, Parque Lecocq (FCE-Dip 1547, 1548); Rocha: Bañado del Indio, 33°55’43”S, 53°32’09”W, 10♂, 21-xii-2023, V.C. Pacheco da Silva leg., S.J. Fitzgerald det., sweeping (FCE-Dip 1518); Same data, except 33°53’12”S, 53°37’31”W, 2♂, 1♀, 20-xii-2023, V.C. Pacheco da Silva leg., in flower of Eryngium sp. (FCE-Dip 1519); camino Bajada Mala, Arroyo Castillos, 34º06’09.1”S, 53º55’26.9”W, 1♂ 1♀, 17-xii-2020, W.S. Serra, G. Furtado leg., S.J. Fitzgerald det., (MNHN 2589) ; Treinta y Tres: NE of Camino del Medio and Río Olimar Grande, 32°59’19.8”S, 54°50’03.6”W, 1♂, 2♀, 19-20-xii-2020, F. Scarabino, W.S. Serra, C. Broggi, G. Tabares, J.C. Zaffaroni leg. S.J. Fitzgerald det. (MNHN 2590); Santa Clara del Olimar, Parque Nacientes del Olimar, 32°55’36.0”S, 54°57’04.9”W, 5♂, 4♀, 19-xii-2020, F. Scarabino, W.S. Serra, J. Broggi, G. Tabares, J.C. Zaffaroni leg, S.J. Fitzgerald det. (MNHN 2591) .

Comments. Plecia gibbosa Hardy was described with an orange thorax. The specimens listed here have the thorax dark brown to blackish, but otherwise have terminalia which appear (from photos) to be similar or the same as in P. gibbosa; these may just represent a dark color morph of P. gibbosa or they may represent a different species. Several other species (some with a dark mesonotum) have male terminalia very similar to P. gibbosa such as P. grisea Edwards, P. rostellata Loew, and P. nuptialis Bravo, Castro and Araújo. A thorough comparison of these taxa would be valuable.