Empis (Planempis), 1953

Daugeron, C. & Shamshev, I. V., 2019, Empis (Planempis) tripotini sp. n. from South Korea: one of the largest empidoid flies ever discovered (Diptera: Empididae), Far Eastern Entomologist 378, pp. 1-10 : 8-9

Key to Empis (Planempis) species with dichoptic eyes in males

1. Prosternum setose ................................................................................................ 2

– Prosternum bare ................................................................................................... 6

2. Hind femur almost evenly slender, with short bristles ventrally .......................... 3

– Hind femur distinctly thickened on basal part, with numerous long bristles ventrally (except extreme base); femora blackish on basal half and yellowish on apical half, tibiae entirely yellowish …....................... E. microtheca Frey, 1955

3. Acrostichal and dorsocentral setae multiserial. Legs entirely black, at most tibiae reddish closer to base .....................................................................................… 4

– Acrostichal and dorsocentral setae irregularly 2-serial. Legs yellowish or with black and yellow pattern ..........................................................................................… 5

4. Palpus black. Proepisternum and laterotergite with black hair-like setae. Abdominal tergites with black hair-like setae laterally ........... E. pan Frey, 1953

– Palpus yellow. Proepisternum and laterotergite with yellow hair-like setae. Abdominal tergites with golden yellow hair-like setae laterally … E. latro Frey, 1953

5. All femora and tibiae brownish yellow. Antennal scape nearly as long as postpedicel ........................................................................… E. pulchra Saigusa, 1964

– Femora blackish, tibiae almost entirely yellowish, sometimes only tips somewhat darkened. Antennal scape nearly half as long as postpedicel ................................ ............................................................................... E. xanthotibia Saigusa, 1964

6. Smaller: body 4.0– 4.5 mm. Cercus with rounded dorsal surface .....................… 7

– Larger: body 8.0–11.0 mm. Cercus with flattened dorsal surface ....................… 8

7. Body (including antennae and legs) largely blackish brown, abdominal tergites 7 and 8 yellowish on posterior half ............................ E. luteipilosa Saigusa, 1992

– Body largely yellow; scutum with very narrow black vittae, abdomen entirely blackish brown ....................................… E. freyi Yang, Zhang et Zhang, 2007

8. Acrostichal setae present, arranged in 1–4 rows. Occiput laterally and postpronotal lobe with tufts of long golden yellow setae ....................................................... 9

– Acrostichal setae absent. Occiput and postpronotal lobe with short yellow hairlike setae ......................................................................................................… 10

9. Acrostichal setae 1–2-serial. Tibiae yellowish ..........… E. achelota Collin, 1941

– Acrostichal setae 4–serial anteriorly. Tibiae black ................… E. tripotini sp. n.

10. Abdominal segments 1–3 entirely yellow; all tergites faintly light grey pollinose ............................................................................ E. xanthomelas Saigusa, 1992

– Abdominal tergite 1 entirely black; tergites 2 and 3 largely yellow, with black, broad, dorsomedian longitudinal vitta; all tergites polished .................................. ............................................................................. E. lucidiventris Saigusa, 1992