Helina

Patitucci, Luciano Damián, Mulieri, Pablo Ricardo & Mariluis, Juan Carlos, 2016, Taxonomic review of the species of Helina R. - D. (Diptera: Muscidae) from Andean-Patagonian forests, Zootaxa 4150 (3), pp. 281-313 : 284-285

Key to Helina species of Andean-Patagonian forests (modified from Malloch 1934)

(Species in brackets were not observed)

1 Metallic violet-blue species; calypteres and halter black. Male unknown...................... [ H. viola Malloch, 1934 ].

- Black species, with grey or brownish-yellow pollinosity; calypteres and halter yellow or white........................ 2

2 Mid and hind femora entirely yellow...................................................................... 3

- Mid and hind femora black, or with a part yellow, but never entirely yellow....................................... 8

3 Fore femur entirely yellow.............................................................................. 4

- Fore femur almost entirely black, at most the apex yellow..................................................... 5

4 Abdomen black with grey-brown pollinosity, arista with hairs three times as long as its basal diameter............................................................................................ H. australis Carvalho & Pont, 1993

- Abdomen black with golden-yellow pollinosity, arista with hairs shorter than basal diameter............ H. dorada sp. nov.

5 Wing with an extra little vein close to cross-vein r-m and the transverse cross-vein dm-cu curved and infuscated........................................................................................... H.ouina sp. nov. (in part)

- Wing without an extra little vein close to cross-vein r-m....................................................... 6

6 Mid tibia without anterodorsal seta. Male: hind femur with long and fine setae on posteroventral surfaces at basal middle......................................................................... H. nigrimana ( Macquart, 1851) (in part)

- Mid tibia with anterodorsal setae. Male: hind femur without long and fine setae on posteroventral surfaces at basal middle.. 7

7 Thorax in lateral view black, parafrontal plate bare, prealar seta the half as long as its anterior supra-alar postsutural seta.................................................................................... H. connexa Malloch, 1934

- Thorax in lateral view grey-brown, parafrontal plate setulose, prealar seta one-third the length of the anterior supra-alar postsu- tural setae. Male unknown........................................................ H. neosimplex Snyder, 1957 .

8 Mid and hind femora yellow at base....................................................................... 9

- Mid and hind femora black at base....................................................................... 10

9 Dorsocentral seta 2+3, abdomen with spots............................................... H. xena Malloch, 1934

- Dorsocentral seta 2+4, abdomen without spots............................................... H. araucana sp. nov.

10 Arista bare or pubescent with its longest hairs hardly longer than diameter of arista................................ 11

- Arista plumose, with its longest hairs two or three times as long as its diameter of arista............................. 13

11 Wings with spots on cross-veins and with an extra little vein close to cross-vein r-m, mid and hind femora almost black, arista bare............................................................................ H. ouina sp. nov. (in part)

- Wings without spots on cross-veins and an extra little vein close to cross-vein r-m, mid and hind femora black with apical yel- low, arista pubescent.................................................................................. 12

12 Prealar seta less than one fourth of the length of the anterior supra-alar postsutural setae, cross vein dm-cu at middle of cell r4+5................................................................................. H. discolor ( Stein, 1911)

- Prealar seta half as long as its anterior supra-alar postsutural seta, cross vein dm-cu in basal half of cell r4+5..................................................................................... H. nigrimana ( Macquart, 1851) (in part)

13 Prealar setae half of the length of the anterior supra-alar postsutural setae, mind tibia without anterodorsal setae.............................................................................................. H. bigoti Malloch, 1934

- Prealar setae one third or one fourth of the length of the anterior supra-alar postsutural setae, mind tibia with 1 or 2 anterodor- sal setae............................................................................................ 14

14 Prealar setae thin, less than one fourth of the length of the anterior supra-alar postsutural setae. Fronto-orbital plate and parafa-

cial black with brown pollinosity. Male: dichoptic, the shortest distance between eyes is 0.46–0.48 mm; frontal seta with 1–2 lateroclinate orbital setae before ocelli. Sternite 5 with yellow spots on posterior margin....... H. rufoapicata Malloch, 1934 - Prealar setae strong, one third of the length of the anterior supra-alar postsutural setae. Fronto-orbital plate and parafacial black with silver or light grey pollinosity. Male: holoptic, the shortest distance between eyes is 0.16–0.32 mm. Sternite 5 without yellow spots on posterior margin....................................................... H. chilensis Malloch, 1934