Eudorylas umbrinus ( Loew, 1858 )

FÖLDVÁRI, MIHÁLY, 2013, Taxonomic revision of the Afrotropical species of the tribe Eudorylini (Diptera, Pipunculidae), Zootaxa 3656 (1), pp. 1-121 : 106-107

Eudorylas umbrinus ( Loew, 1858)

( Figs 36H–M )

Pipunculus umbrinus Loew, 1858: 374 [ 1860: 354]

Diagnosis: Third antennal segment long acuminate. S7, EP visible, abdomen swollen distally, without m.a. Surstyli broad at base, pointed at tip; margins of SES clear, with numerous hairs (on both side); gonopods almost symmetric, IG more rounded; phallic guide broad at base in ventral view (broader in lateral view) and pointed at tip, with distinct hairs in the middle.

Type material: South Africa: 1♂, HT, Caffraria [3 hand-written labels:] “.B.” or “.3.”, “234”, “168”, [typewritten label:] “ Pipunculus umbrinus ” ( NHRS ).

Other material examined: South Africa: 1♂, Natal, Pietermaritzburg, Town Bush, 9 June 1979, R. Miller ( NMSA) .

Male

Head. Third antennal segment long acuminate; yellow-brown. Face subshining black. Frons, upper part shining black, lower part silvery pollinose; eyes touching for distance equal to 3.5 times ocellar triangle. Occiput, lower half silvery pollinose, upper half more brownish.

Thorax. Humeri pale brown. Mesonotum (viewed obliquely from front) brownish pollinose; silver-grey from the side. Scutellum brown, without hairs. Dorsocentral hairs very weakly developed. Halter pale brown.

Legs. Entirely yellow (probably parts of the femora used to be brown on HT), f3 shining pv. Ventroapical row of 6–7 very short spines on f2; spines missing on f1,3. Subapical (distal) spines on first four tibiae present. No anteromedial hairs on 3rd tibia. Hind trochanter without hairs or spines on ventral side. Pulvilli as long as last tarsal segment.

Wing. Fourth costal section 0.8 times as long as third costal section. Cross-vein R-M at 1/3 of discal cell. Pterostigma fully coloured. Dark hairs on tegula present (2).

Abdomen. Viewed obliquely from front tergites brownish pollinose, hind margins and sides slightly greyish. Hairs missing on abdomen. Laterally 3 black bristles on first tergite. Postabdomen in dorsal view: S7, EP visible; T5 0.8 times as long as ST8. Genitalia without dissection: abdomen swollen distally, no m.a., EP and SS yellow.

Genitalia. Surstyli broad at base, pointed at tip; ST8 with uncertain borders ( Fig. 36M ). Margins of SES clear, with numerous hairs (on both side); gonopods almost symmetric, IG more rounded; phallic guide ( Fig. 36I ) broad at base in ventral view (broader in lateral view, Fig. 36H ) and pointed at tip, with distinct hairs in the middle; phallus trifid, curved, with membranous supporting structure; ejaculatory apodeme fan shaped; sperm pump round with two projections ( Fig. 36K ).

Female—Unknown.

Remarks —The type specimen was collected during a Swedish expedition to southern and south-eastern Africa led by J.A. Wahlberg. The numbers refer to particular localities, but the list of localities had disappeared and correct labels had never been produced according to Thomas Pape, NHRS (pers. comm.). Loew (1858: 374) gives the type locality as “Caffraria (Wahlb.)”, which refers to a large part of current South Africa, but does not mention the number of specimens he had studied.

Distribution— South Africa.

Figures

FIGURE 36. Male genitalia of Eudorylas tanzaniensis (A–G) and E. umbrinus (H–M).—A: outer surstylus with phallic guide and outer gonopod, lateral view, B: dorsal view, C: inner surstylus with epandrial process, lateral view, D: sperm pump with ejaculatory apodeme, E: ventral view with phallic guide, phallus (without ST8), F: abdominal tergite 6 (with projection) and 5, G: surstyli, dorsal view, H: outer surstylus with phallic guide and outer gonopod, lateral view, I: ventral view with phallus and phallic guide (without ST8), J: inner surstylus, lateral view, K: sperm pump with ejaculatory apodeme, L: surstyli, dorsal view, M: dorsal view. Scale bars: 0.1 mm