Delia pruinosa

Michelsen, Verner, 2012, Revision of the European Delia pruinosa species group (Diptera: Anthomyiidae) feeding as larvae in seed capsules of Silene L. (Caryophyllaceae), Zootaxa 3434, pp. 31-48 : 45

Key to males and females of the Delia pruinosa species group

1 Males: Eyes narrowly separated above antennae. Sternite V incised at hind margin.................................. 2

– Females: Eyes widely separated above antennae. Sternite V not incised at hind margin............................. 5

2 Hind tibia with apical av-seta short and notably robust ( Fig. 7 , arrow). Surstyli ( Fig. 10 ) very broad in posterior aspect. Sternite IV wider than sternite V; lateral margins of sternites III and IV with long, lateroclinate setae ( Figs. 8, 9 ) D. pruinosa

– Hind tibia with apical av-seta longer, unremarkable ( Fig. 6 , arrow). Surstyli slightly ( Fig. 19 ) to decidedly narrower ( Figs. 27 , 37 ) in posterior aspect. Sternite IV not exceeding width of sternite V; sternal setae shorter, suberect, best developed on anterior third of sternite III ( Figs. 17, 18 , 26 , 35 , 36)............................................................... 3

Figures

FIGURES 1 – 7. Delia spp.: 1. D. sileni sp. nov., female proboscis. 2. Same, male proboscis. 3. Same, female labella. 4. Same, male labella. 5. Same, male left antenna. 6. Same, detail of female left hind leg. 7. D. pruinosa, detail of female left hind leg. Scales: 0.25 mm.

FIGURES 8 – 14. Delia pruinosa, male: 8. Sternites III and IV. 9. Sternite V. 10. Hypopygium, caudal. 11. Hypopygium, lateral. 12. Pre- and postgonites. 13. Phallus, lateral. 14. Distiphallus, caudal. Scales: 0.5 mm for 8 and 9, 0.25 mm for 10 – 14.

FIGURES 17 – 23. Delia judicariae, male. 17. Sternites III and IV. 18. Sternite V. 19. Hypopygium, caudal. 20. Hypopygium, lateral. 21. Pre- and postgonites. 22. Phallus, lateral. 23. Distiphallus, caudal. Same scale: 0.25 mm.

FIGURES 26 – 31. Delia sileni sp. nov., male: 26. Sternites III – V. 27. Hypopygium, caudal. 28. Hypopygium, lateral. 29. Pre- and postgonites. 30. Phallus, lateral. 31. Distiphallus, caudal. Same scale: 0.25 mm.

FIGURES 35 – 41. Delia capdellae sp. nov., male: 35. Sternites III – IV. 36. Sternite V. 37. Hypopygium, caudal. 38. Hypopygium, lateral. 39. Pre- and postgonites. 40. Phallus, lateral. 41. Distiphallus, caudal. Same scale: 0.25 mm.