Leucophenga subpollinosa

Leucophenga subpollinosa species group

Diagnosis. Postocellar setae minute, usually shorter than 1/3 ocellar setae (oc s) in length (Fig. 10 A); wing usually fuscous along R1 (Fig. 2); head, thorax and abdomen with dense silvery pollinosity.

Description. Male and female: Eyes red to brownish red. Ocellar triangle brownish to dark brown. Frons narrow, nearly parallel, with a few minute setulae medially. All orbital setae large; Orb3 (proclinate orbital setae) and Orb2 (anterior reclinate orbital setae) separated by distance less than 1/3 of that between Orb2 and Orb1 (posterior reclinate setae) (Fig. 10 A). Arista plumose. Face usually brownish yellow, facial carina absent. Palpus yellow to brownish, slightly more enlarged distally in female than in male. Vibrissa prominent; subvibrissal setae small. Gena and postgena narrow. Mesonotum usually entirely brownish to dark brown, or with brown to dark brown, longitudinal stripes in male, usually brownish yellow, brownish to brown before scutellum in female. Postpronotal lobe yellow to brown, with 1–3 long seta(e) and a few of shorter setae. Acrostichal setulae in ca. 6–14 irregular rows. Prescutellar setae large. Pleura usually entirely brown to dark brown, or with a brown, longitudinal stripe above. Katepisternum usually entirely brown to dark brown, with two long and some small setae. Meron usually brownish to dark brown above. Scutellum usually entirely brown to dark brown in male, usually brownish yellow to dark brown, brownish yellow to brownish at tip in female. Subscutellum swollen. Basal medial-cubital crossvein absent. Costal vein between R2+3 and R4+5 distally with ca. 3–8 peg-like spinules on ventral surface; R2+3 slightly curved; R4+5 and M1 nearly parallel distally. Halter usually yellowish. Legs yellow, except for the dark colored on knees of mid and hindlegs. Abdominal tergites: mostly brown to black, with variable yellow patterns mainly before 4th tergite (Figs. 7–9). Male terminalia: Epandrium pubescent medially and near posterior margin, usually with several setae around posterior margin and undeveloped apodeme along anterior margin. Surstylus usually broad and flat, nearly entirely pubescent, with several setae on outer and inner surfaces. Cercus separated from epandrium, pubescent and setigerous. Hypandrium (gonopod in Bächli et al. 2004) anteriorly fused to undeveloped aedeagal apodeme, laterally broadened. Gonopods (dorsal arch in Bächli et al. 2004) fused with each other, forming slightly triangular plate, anteroventrally with curved, median rod. Paramere (outer paraphysis in Bächli et al. 2004) glabrous, contiguous to arm of aedeagal apodeme basally, usually with a few sensilla distally. Aedeagal basal bridges (inner paraphysis in Bächli et al. 2004) contiguous to median rod of gonopods, bifurcated basomedially. Aedeagus usually slender, sometimes laterally with a process (lp in Figs. 11–13, 20, 23 D).

In the following descriptions of individual species, only characters showing interspecific variability described for brevity.