Key to males of the Western Palaearctic species of the S. lutea group

1. Dorsal gonocoxal lobe with 1 long seta (Fig. 1) ................................. S. lutea Macquart

­ Dorsal gonocoxal lobe with 2 long setae ...................................................................... 2

2. Gonocoxal apodeme poorly developed ............................................. S. modesta Zaitzev

­ Gonocoxal apodeme strongly developed, ending about distal margin of gonocoxite... 3

3. Dorsal gonocoxal lobe with bifid process (Fig. 3).......................................................... ........................................................................ S. iberolutea Chandler & Blasco­Zumeta

­ Dorsal gonocoxal lobe rounded..................................................................................... 4

4. Distal part of gonocoxal apodeme bifurcate, with processes similar in form ............... 5

­ Distal part of gonocoxal apodeme bifurcate, with processes different in form ............ 6

5. Apodemal processes outwardly directed (Fig. 2) ........................... S. corlutea Chandler

­ Apodemal processes convergent and crossed apically (Fig. 4) ....... S. muglolutea sp. n.

6. Outer apodemal process narrow and pointed ................................................................ 7

­ Outer apodemal process broad and shallowly bifurcate apically................................. 8

7. Outer apodemal process inwardly directed (Fig. 5) ......................... S. eryngii Chandler

­ Outer apodemal process outwardly directed (Fig. 6) ...................................................... ........................................................................ S. pandora Chandler, Bechev & Caspers

8. Outer apodemal process broad (Fig. 7) ............................................ S. delphis Chandler

­ Outer apodemal process elongate (Fig. 8)......................................... S. turkolutea sp. n.