Stichopogon Loew

Abu El-Hassan, Gawhara M. M., Badrawy, Haitham B. M., Gad Allah, Sohair M., Soliman, Ahmed M., Salama, Mohamed S. & Mohammad, Salwa K., 2017, Review of robber flies of the genus Stichopogon Loew (Diptera: Asilidae: Stichopogoninae) from Egypt, Zootaxa 4242 (1), pp. 142-160 : 143-144

Key to species of the genus Stichopogon Loew from Egypt

1. Greyish-yellow species; antenna contrasting in colour with scape and pedicel yellow to reddish-yellow, postpedicel and style black ( Fig. 3B )........................................................................... S. albellus Loew

- Greyish-brown or blackish species; antenna uniformly reddish-yellow, brownish or blackish in colour..................2

2. Abdomen with unicolourous olive-grey tomentum, without bands ( Fig. 11 ); supraalar bristles absent.. S. marinus Efflatoun

- Abdomen banded; supraalar bristles present............................................................... 3

3. Mystax golden-yellow to golden-brown; antenna yellow to reddish-brown........................................ 4

- Mystax white; antenna black........................................................................... 6

4. Brownish-grey species; antenna yellow with blackish style; legs entirely yellow except 5th tarsal segment brown as claws................................................................................. S. inconstans (Wiedemann)

- Greyish-black species; antenna reddish-yellow to reddish-brown; all femora, apical part of tibiae and apical tarsi black.....5

5. Setae on first abdominal tergite thin and weak; dististylus of male narrow and distinctly curved; 8th sternite of female with long tufts of hairs touching in the middle ( Fig.14 C)............................................ S. chrysostoma Schiner

- Setae on first abdominal tergite thicker; dististylus of male wider and less curved; tufts of hairs on 8th sternite of female shorter and scattered in middle ( Fig. 14 D)........................................................... S. scaliger Loew

6. Mystax consist of few bristles, crowded together at most on the middle third of the face and laterally with fine long white hairs; r4 cell of the wing long, the two veins R4, R5 almost parallel................................... S. pusio (Macquart)

- Mystax normal occupying at least the middle two-thirds of the lower part of the face; r4 cell of the wing short or long, veins R4, R5 never parallel......................................................................................7

7. Abdomen black with tergites 1, 4, 5, 8 covered with white tomentum thus forming white transverse bands ( Fig. 5 ); legs entirely black, at most tibiae with greyish tomentum.................................................... S. beckeri Bezzi

- Abdomen not as above, covered with silvery-white or greyish tomentum except for a large brown spot on 2nd to 5th tergites; legs not entirely black, at least basal half of tibiae and metatarsi reddish-yellow to reddish-brown.......................... 8

8. Cell m3 widely open ( Fig. 14B ); pulvilli nearly as long as claws; 1st abdominal segment with dense hairs.............................................................................................. S. elegantulus (Wiedemann)

- Cell m3 narrowly open ( Fig. 14A ), pulvilli 0.5 × as long as claws; 1st abdominal segment with scattered hairs................................................................................................... S. deserti Theodor

Figures

FIGURE 3 A, B. Stichopogon albellus Loew (♀) habitus, body length = 5.8 mm.

FIGURE 5 Stichopogon beckeri Bezzi, habitus; A, B (♀) body length = 7.1 mm & C, D (♂) body length = 6 mm.

FIGURE 11 Stichopogon marinus Efflatoun, habitus; A, B. (♀) body length = 5.5 mm; C, D (♂) body length = 5 mm.

FIGURE 14 A, B. Wings. of Stichopogon deserti, S. elegantulus; C, D Last abdominal segments in female Stichopogon chrysostoma, S. scaliger Loew respectivily.