Acupalpa divisa (Walker)

Shaun L., Winterton, 2011, Revision of the stiletto fly genera Acupalpa Kroeber and Pipinnipons Winterton (Diptera, Therevidae, Agapophytinae) using cybertaxonomic methods, with a key to Australasian genera, ZooKeys 95, pp. 29-79 : 39-40

Acupalpa divisa (Walker) Fig. 7

Dimassus divisus Walker 1850: 3.

Ectinorrhynchus divisus (Walker) - Kröber 1913: 19.

Acupalpa semiflava Mann 1929: 28.

Acupalpa divisa (Walker) - Irwin and Lyneborg 1989: 354 [catalogue]; Winterton 2000: 232; Winterton et al. 2001: 210.

Type material.

Dimassus divisus Walker 1850 -Holotype female, AUSTRALIA (OUMNH).

Acupalpa semiflava Mann 1929 - Holotype female, AUSTRALIA: Queensland: Brisbane, 24.ix.1914, H. Hacker (MEI029471) (QM). Paratypes:Queensland: 3 females, Brisbane, 24.ix.1912, 14.x.1913, 10.x.1916, H. Hacker (MEI092529, 092532, 092534) (QM).

Additional material.

AUSTRALIA: Queensland: male, Barakula State Forest, Hellhole Creek, Auburn Rd., 52062, 13.x.2004, Queensland Museum party, open forest, hand collected [-26.33°, 150.7°] (ANIC29_016460) (QM).

Diagnosis.

Frons profile concave above antenna; antenna black; pleuron black; wing dark banded; femora and tibia black; abdomen black, segments 1-3 yellow at least laterally; abdominal velutum present in male.

Redescription.

Body length= 6.5-8.0 mm. Head. Frons wider than ocellar tubercle, profile transversely concave above antennae, pubescence as silver patches along eye margin, frontal vestiture as minute setae, texture as irregular longitudinal striations; face produced anteriorly, vestiture with dark or pale setae; gena with pale setae; parafacial glabrous; mouthparts elongate, projecting anteriorly, or sometimes relatively short; palpus brown-black, acuminate; occiput glabrous, glossy black; antennal base raised, antennal length approximately equal to head; scape black, length approximately equal to flagellum, with sparse black setae; flagellum black, base of flagellum with short dark setae. Thorax. Scutum uniform grey-black, sometimes with faint white stripes; scutellum overlain with dense, matt-black pubescence; pleuron black, overlain with sparse silver-grey pubescence; wing markings dark banded infuscate; haltere knob white; coxae black; femora brown to black; tibia black; tarsi black; fore basitarsus white distally, 2nd tarsomere basally, remaining basitarsi yellowish. Scutal chaetotaxy: np, 4; sa, 1; pa, 1; dc, 3-4; sc, 1. Abdomen. Segments 2-3 yellow, remaining segments black (male tergites 1-3 dark medially), silver velutum dorsally on tergites (male) or absent (female); terminalia dark.

Comments.

The male of Acupalpa divisa has long been unknown, and herein described for the first time. Hardy (1939) proposed that this species was a synonym of Acupalpa pollinosa , but has been subsequently proved incorrect as corresponding sexes of both species are now known.