Polietina Schnabl & Dziedzicki, 1911

De Carvalho, Claudio J. B. & Haseyama, Kirstern Lica F., 2018, A new species of Polietina (Diptera: Muscidae) from South America, with an updated phylogeny of the genus and a review of species’ identity in GenBank, Zootaxa 4407 (3), pp. 415-426 : 417

Key to Polietina Schnabl & Dziedzicki species (modified from Nihei & de Carvalho 2007)

1. Apical portion of stem-vein dorsally bare.................................................................. 2

- Apical portion of stem-vein dorsally setulose............................................................... 5

2. Three postsutural dc setae; R1 dorsally entirely setulose, except for the basal one-seventh bare; apical portion of stem-vein with some ventral setulae............................................................ P. wulpi Couri & de Carvalho

- Four postsutural dc setae; R1 dorsally bare or setulose; apical portion of stem-vein bare ventrally...................... 3

3. R1 dorsally bare; humeral callus dark......................................................... P. rubella (Wulp)

- R1 dorsally setulose.................................................................................... 4

4. R1 dorsally setulose only on apical third..................................................... P. concinna (Wulp)

- R1 dorsally setulose almost entirely, only the basal one-seventh bare; humeral callus dark-brown..... P. flavidicincta (Stein)

5. Three postsutural dc setae.............................................................................. 6

- Four postsutural dc setae.............................................................................. 11

6. Postalar wall with a set of setulae at the median region and a small set of setulae at the posterior region (sometimes absent in females); costal region with a conspicuous brown macula extending from apex of Sc until apex of R2+3; general coloration dark to blackish-brown............................................................... P. prima (Couri & Machado)

- Postalar wall with a set of setulae only at the median region; costal region slightly infuscate or with conspicuous maculae on apexes of Sc and R2+3, always separated from each other, never as one unique large macula; general coloration highly varied, rarely as above....................................................................................... 7

7. Hind tibia with a series of five or more AV setae (four setae on female). Male: hind tibia with a series of PV setae.............................................................................................. P. flavithorax (Stein)

- Hind tibia with two to four AV setae. Male: hind tibia without a series of PV setae.................................. 8

8. Wing with conspicuous brown macula on apex of R1; apices of veins Sc and R2+3 with conspicuous brown macula.................................................................................................. P. ponti sp. nov.

- Wing without macula or with light infuscation on apex of R1; apices of veins Sc and R2+3 with light infuscation............ 9

9. Scutum yellowish-brown with a dark longitudinal median stripe dorsally, but, after the suture, little defined and not distin- guished from the remaining scutum, which is also dark coloured; lower calypter with yellow-whitish border. Male: marginal spined process of cercal plate with three downwardly orientated spines......................... P. bicolor Albuquerque

- Scutum yellowish-brown with a dark longitudinal median stripe dorsally, always well defined and conspicuous in all its exten- sion; lower calypter with brown border. Male: marginal spined process of cercal plate not as above................... 10

10. Male: marginal spined process of cercal plate with downwardly orientated spines........ P. univittata Couri & de Carvalho

- Male: marginal spined process of cercal plate with upwardly orientated spines.................... P. minor Albuquerque

11. Hind tibia with five or more AV setae; supra-squamal ridge entirely bare. Male: hind tibia with a series of PV setae............................................................................................ P. major Albuquerque

- Hind tibia with two to four AV setae; supra-squamal ridge anteriorly setulose. Male: hind tibia without a series of PV setae..................................................................................................... 12

12. Hind tibia with two AV setae.............................................................. P. orbitalis (Stein)

- Hind tibia with three to four AV setae. Male: marginal spined process of cercal plate with four developed spines................................................................................................ P. steini (Enderlein)