Hercostomus germanus (Wiedemann, 1817) (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 : 38

63. Hercostomus germanus (Wiedemann, 1817) (Dolichopodinae) — new to Portugal

( Fig. 4A )

Number of specimens recorded. 44.

Distribution. Europe; also North Africa. Portugal: four northern provinces.

Ecology. Hercostomus germanus has been recorded from most macrohabitat categories in Portugal, except for the littoral zone and the dunes. In northwestern and central Europe, it is mainly found on Apiaceae (often Daucus carota ) in sunny sites along trails in open forests ( Pollet 2000).

Rarity (%). 8.0 (fairly rare). Extremely rare (FL).

Activity period. May–September, with peak in June.

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.