Grotiusomyia nigricans (Howard)

Hansson, Christer, 2023, Review of Grotiusomyia Girault (Chalcidoidea: Eulophidae), an exclusively New World genus, including 17 new species, Zootaxa 5278 (1), pp. 39-77 : 42-43

Grotiusomyia nigricans (Howard)

Figs 2, 19, 20, 47, 48, 77, 94

Miotropis nigricans Howard, 1894:95 . Lectotype female in NHMUK, designated by Bouček (1977:13), examined.

Derostenus violaceus Howard, 1897:166–167 . Holotype male in NHMUK, examined. Synonymized by Bouček (1977:13). Grotiusomyia nigricans (Howard) , Girault (1918:126).

Diagnosis. Mandibles yellowish-brown with a row of small teeth at apex; flagellum pale brown, 0.6× as long as width of mesoscutum, F4 0.6× as long as wide, apex of clava blunt ( Fig. 47); frons between scrobes and eyes and vertex with strong reticulation ( Figs 77, 94); occipital margin with an edge behind ocellar triangle ( Fig. 77); mesoscutum and mesoscutellum with same colour and reticulation ( Fig. 19); mesoscutellum convex; dorsellum flat, smooth and shiny, posterior margin ±evenly rounded with several sharp dents; fore wing with 3–5 setae in apico-dorsal part of costal cell, completely hyaline ( Fig. 2); fore and mid coxae black with metallic tinges ( Fig. 2); gaster ( Fig. 19) 1.8× as long as wide; Gt 1 0.3× as long as length of gaster, dorsal surface smooth, posterior margin curved slightly forwards; Gt 6 0.2× as long as length of gaster with anterior part 2.7× as wide as width of posterior part, posterior margin straight with sharp edge.

Variation. Length 1.3–2.0 mm. Costal cell with 3–5 setae in apico-dorsal part. Propodeal callus with 10–13 setae. The specimens from Costa Rica have antennal flagellum darker (dark yellowish-brown to pale brown) than specimens from the West Indies (yellowish-brown).

Distribution. Bahamas ( Bouček 1977), Costa Rica (new record), Cuba ( Thompson 1955), Dominican Republic ( De Santis 1989), Grenada ( Howard 1897), Puerto Rico ( Thompson 1955), St. Vincent & Grenadines ( Howard 1894).

Hosts. Hedylepta indicata (Fabricius) ( Pyralidae ) and Urbanus proteus (L.) ( Thompson, 1955).

Material. Type material: Lectotype ♀ of Miotropis nigricans (NHMUK) , holotype ♁ of Derostenus violaceus (NHMUK) . Non-type material (21♀ 5♁, in MZLU, MZUCR, NHMUK): BAHAMAS, San Andros, 15.ix.1975, ex leaf roller on soybean (1♀ 1♁). COSTA RICA: Heredia, Santo Domingo , INBio Parque, 9º59′N, 84º06′W, 1100m, 13.ii.2016 (1♀) ; Heredia, Estación Biológica La Selva , 50m, 10º26′N, 84º01′W, iv.1994 (1♀) , 1♀ from same locality as previous but collected 30-31.iii.2003 ; Limón, Reserva Biológica Hitoy Cerere , 9º40′N, 83º02′W, 100m, 14-18.i.1991 (1♀) ; Limón, Parque Nacional Cahuita , 9º43′N, 82º49′W, 10m, 24.ii.2010 (8♀ 3♁) . GRENADA: Lake Antoine Est., Windward side, [no date] (1♀) ; Mirabeau Est., Windward side, [no date] (1♀) . St. VINCENT: St. David, Richmond Beach , 10.vii.1976 (1♀ 1♁) ; St. George, Belmont , 6.vii.1976 (2♀) ; Charlotte, Mesopotamia , 8.vii.1976 (1♀) ; St. Andrew, Kingstown, Botanical Garden , 1-3.x.1991 (1♀) . TRINIDAD, St. Patrick, Coora , 14.viii.1976 (1♀) .