Exsul tenuis Malloch, 1923

Barbosa, Leandro Silva & Couri, Márcia Souto, 2013, New species and redescriptions of the New Zealand genus Exsul Hutton (Diptera: Muscidae: Coenosiinae), Zootaxa 3647 (2), pp. 382-389 : 386

Exsul tenuis Malloch, 1923

( Figs. 7–11 )

Exsul tenuis Malloch, 1923: 674 . Holotype male, deposited at Smithsonian Institution, National Museum of Natural History, Department of Entomology [not examined]. Type-locality: New Zealand, Milford Sound. 24.xii.1920. Collector C. Fenwick.

Diagnosis. Dorsocentrals 2+4. Wings similar to female of E. singularis , although hyaline. This species is similar to E. singularis differing as follows:

Male. Body length: 11 mm; wing: 13 mm

General coloration. Wing veins with a remarkable brown suffusion along their length and hyaline in females.

Head. Frontal row with six pairs of setae.

Thorax. Dorsocentral setae 2+4. Legs without intense pilosity; fore and hind tibia with a posterior median seta.

Abdomen. Cylindrical.

Terminalia. Hypandrium plate-like. Aedeagus apex enlarged; distiphallus complex with sclerotized structure and distal membrane developed; gonopod relatively short and paramere developed and subpointed ( Fig. 7 ). Sternite 5 setulose, subtriangular ( Fig. 8 ). Cercal plate developed with posterior concavity ( Fig. 9 ).

Female. Length: 11 mm, wing: 13 mm

Similar to male, except for wings hyaline and abdomen elliptic.

Ovipositor. Moderately long, with large tergites with setae on posterior edge. Sternite 6 thick and 7 arrowshape with five setae ( Fig. 10–11 ).

Material examined. NEW ZEALAND: McKinnon, 28.xii.1919, Tillyard col., Malloch det. [13, USNM 13 (nº85.710), AMNZ]. Milford Sound, 24.xii.1920, C. Fenwick col., Sabrosky det., [Allotype, 1Ƥ, USNM]. McKinnon Pass, 29–30.xii.1919, [no collector name] [43 (nº 81.802, 81.803, 81.804 and 85.709), 2Ƥ (nº 81.805 and 81.806) AMNZ].

Figures

FIGURES 7 – 11. Exsul tenuis Malloch: 7 — hypandrium; 8 — sternite 5; 9 — cercal plate; 10 — ovipositor, dorsal view; 11 — ovipositor, ventral view.