Melophagus, Latreille, 1802

Key to all Melophagus View in CoL species, based on Maa (1969) and Doszhanov (2003)

1. Palpi not longer than anterior head shield. Tergite 6 well defined............................................... 2

- Palpi longer than anterior head shield. Tergite 6 poorly defined................................................. 4

2. 8–10 scutellar setae.......................................................... M. rupicaprinus Rondani, 1879 View in CoL

- 2–6 scutellar setae.................................................................................... 3

3. 4–6 scutellar setae. Of these, 2 central ones are equal in length to postalar setae........ M. grunini Maa & Doszanov, 1980 View in CoL

- 2 scutellar setae, which are much longer than postalar setae.............................. M. antilopes (Pallas, 1777)

4. Abdominal setae are dark (almost black).................................................................. 8

- Abdominal setae light................................................................................. 5

5. Length of palpi is two-thirds of head............................................. M. kaukasicus Doszanov, 2003

- Length of palpi is equal to length of head.................................................................. 6

6. Prothoracic spiracle is narrower than the narrowest place between coxal recesses of first and second pairs of legs. Setae of sternite 1 on surface are thinner and shorter than those on posterior margin and lateral processes............................................................................................ M. dispnoetus Maa & Doszanov, 1980

- Prothoracic spiracle is noticeably wider than the narrowest place between coxal recesses of first and second pairs of legs. Setae of sternite 1 are equally strong.......................................................................... 7

7. Combined length of head and thorax more than 2.4 mm. Collected in Himalayas.......... M. ovinus himalayae Maa, 1969 View in CoL

- Combined length of head and thorax less than 2.4 mm. Collected in other places........ M. ovinus ovinus (Linnaeus, 1758) View in CoL

8. 4 scutellar setae.................................................................... M. storozhenkoi sp. nov.

- More than 4 scutellar setae............................................................................. 9

9. 8–12 light brown scutellar setae............................................... M. kamtshaticus Doszanov, 1979 View in CoL

- 6–7 dark scutellar setae...................................................... M. montanus Ferris & Cole, 1922 View in CoL