KEYS TO SWEDISH GENERA AND SPECIES OF DOLICHOPODIDAE

by I.Ya. Grichanov

Igor Grichanov, All-Russian Institute of Plant Protection, Podbelskogo 3, St. Petersburg, Pushkin, Russia.E-mail: grichanov@hotbox.ru
Last updated: 6 May 2003 

Genus Hercostomus Loew
See pictures here
1. Males ... 2
Females ... 27
2. Antennal stylus long pubescent, with hairs approximately 1.5 times longer than basal diameter of stylus; notopleuron having strongly pronounced purple spot; male cercus elongate-triangular, strongly incised along ventral margin ... 3

Antennal stylus bare, rarely pubescent; notopleuron usually without purple spot; cercus various ... 4

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; antenna partly yellow; 4.5-6.0 ... infuscatus (Stannius)

4. Metapleuron with group of hairs before posterior spiracle; posterior part of mesonotum and scutellum dorsally with hairs; R4+5 and M1+2 parallel ... 5

Metapleuron and posterior part of mesonotum usually bare; scutellum usually without dorsal hairs; R4+5 and M1+2 usually convergent ... 13

5. Femora mainly dark, at most yellow on extreme apex ... 6

Femora mainly yellow, at most infuscated on posterodorsal side ... 7

6. Midtibia swollen, somewhat curved and armed ventrally with 3-4 short spine-like setae which arise from small tubercles; ventral side of midtibia without pubescence; costa conspicuously thickened beyond the end of subcosta; hind tibia completely yellow; larger species, total wing length more than 3.5 ... cupreus (Falln)

Midtibia simple, bearing normal pubescence and 1 anteroventral seta; costa not thickened as above; hind tibia distinctly infuscated on apex; smaller species, total wing length less than 3.5 ... angustifrons (Staeger)

7. Fore tibia with 1 conspicuous apicoventral seta; 3.7-4.5 ... chalybeus (Wiedemann)

Fore tibia without apicoventral seta ... 8

8. Wing with costa strongly thickened between humeral crossvein and tip of subcosta ... 9

Above section of costa not thickened, distinctly thinner than next section ... 10

9. Cercus yellow; hind basitarsus yellow in proximal half; hind tibia yellow, at most slightly infuscated in apical fifth; costal thickening 2/3 as long as costal cell; 3.0 ... celer (Meigen)

Cercus brownish-black; hind basitarsus mostly entirely dark; hind tibia slightly to distinctly infuscated in apical fifth; costal thickening 1/3 as long as costal cell; 2.5... brevicornis (Staeger)

10. Face velvet-black; clypeus with short black pubescence; wings clear; cercus distinctly black, well-developed; 2.5-3.0.Figs. 45, 47 ... aerosus (Falln)

Face silvery white; clypeus entirely bare; wings distinctly dark; cercus either brownish black or yellow ... 11

11. Proximal part of CuA1 more than twice longer than apical part; proximal part of M1+2 slightly longer than apical part; cercus well-developed, somewhat round, piceous except for ochreous yellow base; larger species, total wing length on average more than 4.0.Fig. 46, 50... metallicus (Stannius)

Proximal part of CuA1 less than twice longer than apical part; proximal part of M1+2 slightly shorter than apical part; cercus rather small; smaller species, total wing length less than 4.0... 12

12. Cercus ochreous yellow; fore coxa mostly yellow, especially on lateral side; femora and tibiae entirely yellow; tarsi only feebly infuscated; 2.5-3.0.Fig. 49 ... blankaartensis Pollet

Cercus black; fore coxa mostly dark; femora pale yellow; hind tibia slightly to distinctly infuscated in apical 1/4 to 1/3; 2.5-3.0.Fig. 48 ... assimilis (Staeger)

13. Femora yellow ... 14

Femora black ... 23

14. Lower postocular setae black ... 15

Lower postocular setae light (white or yellow) ... 17

15. 3rd and 4th segment of fore tarsus dilated; 3.0-3.5.Fig. 54. ... chetifer (Walker)

Fore tarsus simple ... 16

16. Fore tibia bearing long apicoventral seta; 3.7-4.5.Fig. 52 ... chalybeus (Wiedemann)

Fore tibia without long apicoventral seta; 2.0.Fig. 57 ... nanus (Macquart)

17. Antenna partly yellow ... 18

Antenna entirely black ... 20

18. Lower calypter with black cilia; first two segments of fore tarsus with white and black rings; cercus trapezoidal, black-brown; 4.0-4.5.Fig. 51 ... chrysosygos (Wiedemann)

Lower calypter with light (white or yellow) cilia ... 19

19. Antennal postpedicel 1.5 times longer than high; cercus triangular, without distal emargination, half as long as hypopygium, black-brown, yellow at base, with long yellow cilia; 2.5-3.5.Fig. 55 ... fulvicaudis (Walker)

Antennal postpedicel hardly longer than high; cercus very small, triangular, with shallow distal emargination, 1/4 as long as hypopygium, yellow, black along distal margin, with black cilia; 2.5-3.0.Fig. 58 ... rothi (Zetterstedt)

20. Lower calypter with light (white or yellow) cilia ... 21

Lower calypter with black cilia ... 22

21. Fore tibia bearing long apicoventral seta; costa thickened at R1; 4.0-4.5 ... gracilis (Stannius)

Fore tibia without long apicoventral seta; costa simple; 3.0 ... ruficauda (Zetterstedt)

22. At least 4th segment of fore tarsus dilated, black; 5th segment of same tarsus white at apex; 3.0-3.5 ... chetifer (Walker)

Fore tarsus simple; 3.0-3.5.Fig. 53 ... germanus (Wiedemann)

23. Lower postocular setae black; legs entirely black ... 24

Lower postocular setae light (white or yellow) ... 25

24. Fore tibia bearing long apicoventral seta; frons whitish pollinose; cercus short but broad; 5.0-6.0.Fig. 60 ... nigrilamellatus (Macquart)

Fore tibia without long apicoventral seta; frons silvery-white; fore knee yellow-red; cercus higher than long; 4.0 ... argentifrons Oldenberg

25. Proboscis elongated, equal approximately to 2/3 height of head; wing brown; cercus triangular; 3.0-3.5.Fig. 56 ... nigripennis (Falln)

Proboscis short ... 26

26. Mid basitarsus with a number of ventral setae; scutellum haired dorsally; 5.0 ... sahlbergi (Zetterstedt)

Mid basitarsus without ventral setae; scutellum bare dorsally; 5th segment of midtarsus slightly dilated; 5.0.Fig. 59 ... nigriplantis (Falln)

27. Antennal stylus long pubescent, with hairs approximately 1.5 times longer than basal diameter of stylus; notopleuron having strongly pronounced purple spot ... 28

Antennal stylus bare, rarely pubescent; notopleuron usually without purple spot ... 29

28. Antenna black; wing grey, with dark spot in apical part, transparent at apex behind M1+2 ... nobilitatus (Linnaeus)

Antenna partly yellow; wing evenly grey ... infuscatus (Stannius)

29. Metapleuron with group of hairs before posterior spiracle; posterior part of mesonotum and scutellum dorsally with hairs; R4+5 and M1+2 parallel ... 30

Metapleuron and posterior part of mesonotum usually bare; scutellum usually without dorsal hairs; R4+5 and M1+2 usually convergent ... 38

30. Femora mainly dark, at most yellow on extreme apex ... 31

Femora mainly yellow, at most infuscated on posterodorsal side ... 32

31. Clypeus bare; midtibia with several anteroventral setae; face wide, approximately twice wider than postpedicel; hind tibia mostly entirely yellow; larger species, total wing length more than 3.5 ... cupreus (Falln)

Clypeus pubescent; midtibia with only one anteroventral seta; face narrow, hardly wider than postpedicel; hind tibia distinctly infuscated on apex; smaller species, total wing length less than 3.5 ... angustifrons (Staeger)

32. Costa with a distinct, even if only slight, thickening between humeral crossvein and tip of subcosta, with thickest part at least as thick as next part of costa ... 33

Costa without above thickening, this section distinctly and uniformly thinner than next section ... 34

33. Epistome with long pale pubescence; clypeus with short rather dark pubescence; postpedicel mostly slightly acute; fore coxa mainly dark, mostly yellow in apical 1/2 to 1/3, rarely slightly infuscated dorsally; hind basitarsus yellow at least in proximal half; hind tibia at most slightly infuscated in apical fifth; parameres pale brown with white tip ... celer (Meigen)

Epistome with long dark pubescence; clypeus with short dark pubescence; postpedicel mostly obtuse; fore coxa mainly dark, mostly yellow on extreme apex; fore femora yellow, distinctly infuscated posterodorsally along whole length; hind basitarsus mostly entirely dark (when yellow, still darker than proximal part of tibia); hind tibia mostly slightly to distinctly infuscated in apical fifth; parameres black with white tip ... brevicornis (Staeger)

34. Clypeus with conspicuous pubescence ... 35

Clypeus entirely bare ... 36

35. Fore and hind femora distinctly infuscated at least postero-dorsally; wings clear; proximal part of CuA1 less than twice longer than apical part; proximal part of M1+2 somewhat shorter than apical part; smaller species, total wing length about 3.0 ... aerosus (Falln)

All femora entirely pale yellow; wings clearly dark; proximal part of CuA1 more than twice longer than apical part; proximal part of M1+2 slightly longer than apical part; larger species, total wing length on average more than 4.0 ... metallicus (Stannius)

36. Mid tibia with 2 anteroventral setae; hind tibia entirely dark ... chalybeus (Wiedemann)

Mid tibia with 1 anteroventral seta; hind tibia mostly yellow ... 37

37. Hind tibia distinctly infuscated in apical 1/4 to 1/3; fore and middle tarsi distinctly infuscated from apex of basitarsus onwards; hind basitarsus darker than proximal half of hind tibia; fore coxa mostly dark ... assimilis (Staeger)

Hind tibia and basitarsus entirely yellow; fore and middle tarsi only feebly infuscated; fore coxa largely yellow, in particular on lateral side ... blankaartensis Pollet

38. Femora yellow ... 39

Femora black ... 47

39. Lower postocular setae black ... 40

Lower postocular setae light (white or yellow) ... 46

40. Antenna partly yellow ... 41

Antenna entirely black ... 43

41. Lower calypter with black cilia ... chrysosygos (Wiedemann)

Lower calypter with light (white or yellow) cilia ... 42

42. Postpedicel not longer than high, slightly brownish above and distally; hind tibia in distal half with comb of small posterodorsal setae ... rothi (Zetterstedt)

Postpedicel slightly longer than high, distinctly darkened (brown or black) above and distally; comb of small posterodorsal setae on hind tibia weakly pronounced ... fulvicaudis (Walker)

43. Fore tibia without median posteroventral seta ... 44

Fore tibia bearing 1 or more distinct, even though rather small, posteroventral seta ... 45

44. Scutellum haired ... nanus (Macquart)

Scutellum bare ... females of the genus Sybistroma

45. Lower calypter with mostly light cilia ... gracilis (Stannius)

Lower calypter with black cilia ... germanus Wiedemann

46. Proboscis and palpus yellow ... chetifer (Walker)

Proboscis and palpus dark ... nanus (Macquart)

47. Lower postocular setae black ... nigrilamellatus (Macquart)

Lower postocular setae light (white or yellow) ... 48

48. Proboscis elongated, at least half as long as head height ... nigripennis (Falln)

Proboscis short ... 49

49. Femora entirely black; hind tibia black at base and at apex; fore tibia with 8-10 setae ... sahlbergi (Zetterstedt)

Apices of femora yellow; hind tibia black at apex only; fore tibia with 5-6 setae ... nigriplantis (Falln)


Dolichopodidae Homepage
Hosted by uCoz