Orseolia graminis (Kieffer & Docters van Leeuwen-Reijnvaan)

Kolesik, Peter & Gagné, Raymond J., 2020, A review of the gall midges (Diptera: Cecidomyiidae) of Indonesia: taxonomy, biology and adult key to genera, Zootaxa 4847 (1), pp. 1-82 : 51-52

Orseolia graminis (Kieffer & Docters van Leeuwen-Reijnvaan)

[ Figs 26 c–d]

Courteia graminis Kieffer & DvLR, 1910: 131 .

Orseolia graminis (Kieffer & DvLR): Gagné (1973: 507) , new combination; Gagné (1985: 143) (revision).

Type series. Type female, now likely lost, was reared from Ottochloa nodosa (Kunth) Dandy (as Panicum nodosum Kunth ) ( Poaceae ) in Salatiga, Java, 10-iv-1909.

Description. Female. The only relevant descriptive characters given in Kieffer & DvLR (1910) are that the fly is large, 3.5 mm long, and has a 2-segmented palpus. Their single drawing of the two last flagellomeres is shown here [ Fig. 26d ].

Male, pupa, larva unknown.

Biology. Kieffer & DvLR (1910) and DvLR & DvL (1926, gall No 64, Fig. 38 ) [ Figs 26c ] describe the gall as a hairy, 8 mm long and 3 mm wide, leaf sheath on Ottochloa nodosa (as Panicum trigonum Retz. ) ( Poaceae ). The sheath does not grow into a long tube, but remains short, oval at base and pointed towards the tip. The leaf blade is often rudimentary at the top of the gall or totally missing [ Fig. 26c ]. Galls develop at the end of the stem or out of a side bud. The type female emerged 10-iv.

Geographical distribution. This species is known from Java: Salatiga , alt. 600 m, i-1909; Mt Ungaran , alt. 1000 m, v-1910; Bogor, Botanic Gardens , alt. 250 m, v-1920; Ngarengan, near Semarang , alt. 40 m, ii-1920; Cigombong, near Bogor , alt. 400 m., iv-1925.

Figures

FIGURES 26a–b. Orseolia apludae: a, gall on Apluda mutica (arrows indicate galls; Fig. 28 of DvLR & DvL (1926)); b, male terminalia (dorsal, cerci omitted, from Gagné 1985). Figs 26c–d. Orseolia graminis: c, gall on Ottochloa nodosa (arrow indicates gall; Fig. 38 of DvLR & DvL (1926)); d, last two female flagellomeres (from Kieffer & DvLR (1910)).

FIGURES 38a–c. Galls on Oreocnide rubescens: a, galls of Schizomyia villebrunneae type series (Fig. 237 of DvLR & DvL (1926)); b, galls of Schizomyia sp. (Fig. 236 of DvLR & DvL (1926)), c, galls of undetermined cecidomyiid (Fig. 238 of DvLR & DvL (1926)). Figs 38d–k. Schizomyia villebrunneae: d, larval spatula with associated papillae; e-i, male: e, tarsus; f, 3rd flagellomere (damaged); g, palpus; h, last tarsomere; i, terminalia (dorsal); j, pupal anterior segments (lateral); k, same, detail (ventral). Figs 38l–q. Schizomyia sp.: female: l, last tarsomere; m, palpus; n, antenna; o, tarsus; p, 2nd flagellomere (damaged); q, ovipositor apex.