Spathipheromyia, Bigot, 1884

Patitucci, Luciano Damián, Olea, María Sofía & Mulieri, Pablo Ricardo, 2019, A review of Spathipheromyia (Diptera: Muscidae) from Argentina with the description of an extra-large new species, Zootaxa 4701 (2), pp. 168-178 : 169-170

Key to Spathipheromyia species of Argentina and Chile (modified from Malloch 1934)

Specimens of S. auriceps ( Stein, 1911) , S. fenestrata ( Bigot, 1888) and S. stellata , registered for Chile, were not observed and not included here. We examined high quality images of the type specimens of S. insularis Malloch, 1934 (http://data.nhm.ac.uk/object/303b9449-d759-4f9a-8169-af07bfa475c0) (BMNH), S. magellani (http://data. nhm.ac.uk/object/e349168e-a549-475d-bb6a-b25f17724075) (BMNH), and S. chilensis (http://data.nhm.ac.uk/ object/64de4881-bebd-4c95-8206-f5fd960a0f9e) (BMNH).

1 Legs including tibiae, largely or entirely black or fuscous, only apical tip of femora brownish-yellow; antenna black................................................................................................ S. atra Malloch

- Legs with at least tip of mid and hind tibiae orange yellow, if only faintly so then face is greyish white pollinose; antenna black, or yellow, or with black part and yellow part............................................................... 2

2 Male ............................................................................................... 3 - Female............................................................................................. 7

3 Mid femur with a row of strong comb-like spines on posteroventral surface that are stouter and closer each other near apex..................................................................................... S. magellani Malloch

- Mid femur without comb-like row of stout setae on apical part of posteroventral surface............................. 4

4 Face and gena with golden pollinosity..................................................................... 5 - Face and gena with silver pollinosity, sometimes with yellow-brown pollinosity but never with golden pollinosity........ 6

5 Scape orange-yellow; palpi strongly dilated at apex; abdomen with a brown central stripe on tergite 1+2 – 5 (seen from be- hind)............................................................................ S. guttipennis (Thomson)

- Scape black; palpi slightly dilated at apex; abdomen with a central stripe only on syntergite 1+2........ S. chilensis Malloch

6 Mid tibia with two anterodorsal setae; small species (average length: 3.35 mm); crossvein dm-cu straight; sternite 5 without spines on apical margin................................................................. S. albiceps Malloch

- Mid tibia with three anterodorsal setae, robust species (average length: 5.15 mm; crossvein dm-cu curved; sternite 5 with several small blunt spines on apical margin....................................................... S. goliat sp. nov.

7 Tibiae black, with at least tip of mid and hind tibiae orange yellow, if only faintly so then the face is greyish white pollinosity.................................................................................... S. insularis Malloch

- Tibiae yellow; face with golden or grey pollinosity........................................................... 8

8 Robust species; average length more than 5 or 6 mm ......................................................... 9 - Small species; average length less than 4 mm .............................................................. 10

9 Gena with golden pollinosity; scape black, pedicellum black with apex brownish-red; crossvein dm-cu straight............................................................................................... S. magellani Malloch

- Gena with silver-grey pollinosity; scape and pedicellum orange-yellow; crossvein dm-cu curved.......... S. goliat sp. nov.

10 Gena with golden pollinosity; abdomen with central stripe.................................. S. guttipennis (Thomson) - Gena with grey pollinosity; abdomen without central stripe..................................... S. albiceps Malloch