Posted by Igor Grichanov on 11-12-2008 07:58
#4
Poecilobothrus ducalis (Loew, 1857):
2. Hind basitarsus with 2-4 dorsal setae; 6.0-7.0........................regalis (Meigen)
– Hind basitarsus bare above............................................................................ 3
3. Wing at apex with strongly pronounced milky-white spot; antenna black; 6.0-
7.0............................................................................. nobilitatus (Linnaeus)
– Wing at apex without milky-white spot ......................................................... 4
4. Face ochre-yellow or golden-yellow............................................................. 5
– Face snow-white or greyish-white, at most slightly yellowish under antennae 7
5. Antenna mostly yellow-orange, postpedicel black in apical half; 5.0-6.0.........
............................................................................chrysozygos (Wiedemann)
– Antennal postpedicel entirely black............................................................... 6
6. Scape and pedicel (except dorsal side) reddish-yellow; wing weakly and
regularly darkened; fore coxa yellow; 4.5-7.0 ................comitialis (Kowarz)
– Antenna black, scape reddish-yellow ventrally at apex; wing distinctly dark in
anterior half; fore coxa grey; 4.5-6.0.....................................ducalis (Loew)
[see Grichanov, I.Ya. 2007. A checklist and keys to Dolichopodidae (Diptera) of the Caucasus and
East Mediterranean. St.Petersburg: VIZR RAAS (Plant Protection News Suppl., ISSN
1815-3682): 160 p.
http://www.dipter...p?cat_id=8]