Hydrotaea cyaneiventris (Macquart, 1851)

Gomes, Lucas R. P., Couri, Márcia S. & De Carvalho, Claudio J. B., 2018, Anthomyiidae, Fanniidae and Muscidae (Diptera) from the Juan Fernández Archipelago (Chile): 60 years after Willi Hennig’s contributions, Zootaxa 4402 (2), pp. 373-389 : 382

Hydrotaea cyaneiventris (Macquart, 1851)

( Figs. 33, 34 )

Diagnosis: General coloration of the body bluish-black, not metallic; gena with strong, upward-directed setae, arista pubescent; dorsocentral setae 2+4, notopleuron with two setae and covered with some cilia, katepisternal setae 1+2, lower posterior a little longer than cilia covering katepisternum; calypter dark brown with black cilia on outer margin. Male: fore tibia flattened along basal half of ventral surface; fore femur with two toothed processes on ventral and posteroventral surfaces. Body length: 5.6–8.4 mm. Wing length: 5.2–6.4 mm.

Material examined: CHILE: Juan Fernández , Robinson Crusoe Island 2 males, Bahia Cumberland, 1– 11.i.1993, Marshall & Gonzalez ; 2 males and 13 females, open forest near Plazoleta , 1–9.i.1993, S. A. Marshall ; 6 females, Mirador Selkirk , 1–10.i.1993, S. A. Marshall ; 1 female, sweeping through swarms of male scales, 4.i.1993, S. A. Marshall.

References: Malloch (1934); Palka-Rocha & de Carvalho (1994); de Carvalho & Couri (2002).

Distribution: Argentina, Bolivia, Colombia and Chile (including Juan Fernández Archipelago) (de Carvalho et al. 2005).

Biology: There are no biological studies on this species, but larvae of other species of Hydrotaea have been found in cow dung, bird nests (North America) and preying on Diptera larvae in manure ( Australia) ( Malloch 1934).

Comments: Hennig (1955) identified nine individuals of H. cyaneiventris in the Robinson Crusoe (2 males and 2 females) and Alejandro Selkirk Islands (5 females) ( Table 1).

Figures

FIGURES33–38.Hydrotaea cyaneiventris (Macquart, 1851):(33) male and (34) female,lateral view.Limnophora patagonica Malloch, 1934: (35) male and (36) female, lateral view. Lispoides insularis Hennig, 1957: (37) male and (38) female, lateral view.Scale:1.0 mm.