Eudorylas decorus ( Hardy, 1950 )

FÖLDVÁRI, MIHÁLY, 2013, Taxonomic revision of the Afrotropical species of the tribe Eudorylini (Diptera, Pipunculidae), Zootaxa 3656 (1), pp. 1-121 : 52-54

Eudorylas decorus ( Hardy, 1950)

( Figs 17A–G , 40P–Q )

Dorilas (Eudorylas) decorus Hardy 1950: 24 .

Diagnosis: Third antennal segment long acuminate. Abdomen elongated (especially T2,3), broadest at T5. S7, and edge of EP visible; T6 with special protuberance. Surstyli asymmetrical, OS with two projections (in ventral view); epandrium elongated, with round projection in lateral view; SES with hairs on each side; phallic guide pointed, with membranous lobes at tip and minute spines at base (facing SES) in lateral view; branches of the phallus very narrow (needle-like) at tip.

Type material: Democratic Republic of Congo: 1♂, HT, Congo belge: P.N.A. vers Rweru ( Volc. Mikeno ) 2400 m ,, (Bambous) 26 au 27-vii.1934, G.F. de Witte: 501 ; 1♀, AT, Congo belge: Kivu, Rutsuru (riv. Musugereza ), 1700 m [as “ 1.100 m ” in Hardy 1950], 4-vii-1935, G.F. de Witte: 1607 ; 1♀, PT, Lac Edouard : E. Rwindl, 15-I-1936, Dr. H. Damas, Parc Nat. Albert (all MRAC) ; 1♂, PT, same data as HT ; 1♂, PT, Congo belge: P.N.A., Tshamugussa (Bweza), 2250m, ( Bambous ), 10-viii-1934, G.F. de Witte: 527 (both USNM) . Rwanda: 1♂, PT, Congo belge: Ruanda, Nyabireke (pied volc. Karisimbi ), 2400 m, 22-ii-1934, G.F. de Witte: 1184 ; 1♂, PT, Congo belge: Ruanda, Mt. Tamira (près lac N´Gando ), 2600 m, 11-iii-1935, G.F. de Witte: 1308; (both MRAC) .

Other material examined: Democratic Republic of Congo: 1♂, Congo belge: P.N.U., Lusinga (riv. Lusinga ), 14.06.1945, G.F. de Witte: 130–131 ; 1♀, Congo belge: P.N.U. Mukana (1.810 m), 22– 23.04.1949, Mis. G.F. de Witte. 2550a (both MRAC) ; 1♂, 1♀, same data as HT, 3.vii-1934, [No.] 469 (both AMNH), the latter two specimens were erroneously labelled as PTs, and are not listed in Hardy (1950).

Male

Head. Third antennal segment long acuminate; yellow. Face greyish pollinose. Frons, upper part shining black, lower part greyish pollinose; eyes touching for distance equal to 3 times ocellar triangle. Occiput, upper half shining black, lower half greyish pollinose.

Thorax. Humeri yellow. Mesonotum (viewed obliquely from front) slightly greyish pollinose, along anterior margin more greyish, shining black distally; greyish from the side. Scutellum brownish pollinose, apex shining black, with 3–4 pairs of very weakly developed hairs. Dorsocentral hairs very weakly developed. Halter yellowbrown.

Legs. Trochanters, femora, knees, tibiae, tarsal segments yellow, last segment darker; hind tibia slightly thickened in the middle. Ventroapical row of spines: only a few weakly developed hairs on all femora. Subapical (distal) spines on first four tibiae present. No anteromedial hairs on 3rd tibia. Hind trochanter covered by dense pubescence with several erected pale hairs on ventral side. Pulvilli smaller than last tarsal segment.

Wing. Fourth costal section 1–1.8 times as long as third costal section, wing long (1.5 times as long as body length). Cross-vein R-M before 1/3 of discal cell. 4/5 of the pterostigma is coloured. Hairs on tegula absent.

Abdomen. Elongated in general (especially T2,3), broadest at T5. Viewed obliquely from front tergites subshiningshining black. Hairs dispersed, short, white and weakly developed. Lateral spines on first tergite: 1(-3) longer dark hairs. Postabdomen in dorsal view: S7, and edge of EP visible; T5 as long as ST8. Genitalia without dissection: no m.a., ST8 angled on right side, EP and SS swollen, completely yellow.

Genitalia. T6 with special protuberance ( Fig. 17F ). Surstyli asymmetrical, OS with two projections (in ventral view); epandrium elongated, with round projection in lateral view ( Fig. 17C ); ST8 roundish, without m.a. SES borders only clear in lateral view, with hairs on each side; gonopods asymmetrical, OG longer, both pointed, in ventral view ( Fig. 17D ): rounded; phallic guide broad, sides parallel, in lateral view ( Fig. 17A ): pointed, with membranous lobes at tip and minute spines at base (facing SES); phallus trifid, at tips very narrow (needle-like); ejaculatory apodeme fan-shaped, flat; sperm pump with two wing-like projections ( Fig. 17G ).

Female

As male except for the following characters. Frons, eyes separated; upper part shining black, lower part silver-grey pollinose (distinct border between the two parts) except very narrow black median line. Pulvilli and claws at least 2 times as long as last tarsal segment. Sides of abdominal segments with grey triangles, T1 with 2–3 longer, dark hairs. Female ovipositor ( Figs 40P–Q ) globular base, slightly divided into two parts, piercer pointed, area with cerci shining.

Distribution— Democratic Republic of Congo, Rwanda.

Figures

FIGURE 17. Male genitalia of Eudorylas decorus (A–F) and E. denotatus (G–L).—A: outer surstylus with phallic guide and outer gonopod, lateral view, B: dorsal view, C: inner surstylus, lateral view, D: ventral view with phallic guide and phallus (without ST8), E: surstyli, dorsal view, F: abdominal tergite 5 and 6, dorsal view, G: sperm pump with ejaculatory apodeme, H: outer surstylus with phallic guide, lateral view, I: dorsal view, J: inner surstylus, lateral view, K: surstyli, dorsal view, L: ventral view with phallic guide (without ST8), M: phallus with phallic sheath and sperm pump with ejaculatory apodeme. Scale bars: 0.1 mm

FIGURE 40. Female ovipositors.—A–B: Eudorylas aethiopicus, C–D: Eudorylas bredoi, E: Clistoabdominalis lomholdti, F: Clistoabdominalis nitidifrons, G: Eudorylas falcatus, H–I: Eudorylas flexus, J: Clistoabdominalis crassus, K: Eudorylas setiformis, L: Clistoabdominalis lomholdti, M: Dasydorylas sordidatus, N–O: Eudorylas mikenensis, P–Q: Eudorylas decorus, R–S: Eudorylas galeatus, T: Eudorylas sinuosus, U: Eudorylas wittei, V–W: Dasydorylas evanidus. Scale bar: 0.5 mm