Hercostomus pilifer (Loew, 1859) (Dolichopodinae)

Pollet, Marc, Andrade, Rui, Gonçalves, Ana, Andrade, Pedro, Jacinto, Valter, Almeida, Jorge, Braekeleer, Anja De, Calster, Hans Van & Brosens, Dimitri, 2019, Dipterological surveys in Portugal unveil 200 species of long-legged flies, with over 170 new to the country (Diptera: Dolichopodidae), Zootaxa 4649 (1), pp. 1-69 : 40

66. Hercostomus pilifer (Loew, 1859) (Dolichopodinae) — new to Portugal

( Fig. 4B )

Number of specimens recorded. 44.

Distribution. Rather restricted to western and southwestern Europe. Portugal: five northernmost provinces.

Ecology. Most often collected in grassland and heathland biotopes, and thus far not observed in the littoral zone, dunes nor mountains. In northwestern Europe, this species is mainly found in humid to rather humid forests, and wooded swamps (or carrs) ( Pollet 2000).

Rarity (%). 10.3 (common). Fairly rare (FL).

Activity period. May–September.

Figures

FIGURE 4. Selected Portuguese species. A. Hercostomus germanus (♂); B. Hercostomus pilifer (♂); C. Hydrophorus oceanus (♀); D. Hydrophorus praecox (♀); E. Liancalus virens (♀); F. Machaerium maritimae (copula); G. Medetera ambigua (♂); H. Medetera dendrobaena (♂); I. Medetera flavipes (♂); J. Medetera mixta (♀); K. Medetera muralis (♂); L. Medetera peloria (♂); M. Medetera petrophiloides (♀); N. Medetera truncorum (♂); O. Muscidideicus praetextatus (♂); all photos by Rui An- drade.