Table 2. List of sites sampled for stiletto flies at three localities within the Guadalupe-Nipomo dune system.
| A. Rancho Guadalupe-Nipomo County Park. | ||||
| Zone | Site | site description | coordinates | date(s) sampled |
| 2 | 1 | Hummock (Ammophila arenaria) | 34° 57' 57" N 120° 39' 02" W | 21.VI.1997 |
| 2 | Hummocks with prostrate vegetation (Ambronia sp., Ambrosia chamissonis) | " " | " " | |
| 3a | 1 | Open dune plain adjacent to Zone 3a-4 | 34° 57' 32" N 120° 38' 27" W | 17, 19, 21, 25.VI.1997 [14.V., 1-2, 17.VI.2001] |
| 2 | Hummocks with prostrate vegetation (Ambrosia chamissonis) | " " | 21,25.VI.1997 | |
| 3 | Crest of retention ridge with erect, herbaceous vegetation (Senecio blochmaniae) | " " | 25.VI.1997 | |
| 3b | 1 | Sheltered dune plain with woody scrub cover (Lupinus chamissonis, Ericameria ericoides) | " " | 17, 19, 21, 25.VI.1997 [14.V., 1-2, 17.VI.2001] |
| 3a-4 | 1 | Crest of retention ridge under Salix lasiolepsis | " " | 25.VI.1997 [2.VI.2001] |
| 4 | 1 | Slipface of retention ridge (Salix lasiolepsis, Quercus agrifolia) | " " | [2.VI.2001] |
| B. Backdunes, west of Teixiera Farms. | ||||
| Zone | Site | site description | coordinates | date(s) sampled |
| 3a | 1 | Open dune ridge adjacent to Zone 3b, Site 1 (sand mixed with straw from straw plugs) | 35° 02' 00" N 120° 36' 54" W | 19, 20.VI.1997 |
| 2 | Open dune plain adjacent to Zone 3a, Site 4 (sand without straw) | 35° 01' 39" N 120° 36' 40" W | 20.VI.1997 | |
| 3 | Open dune slope adjacent to Zone 3b, Site 2 (sand without straw) | " " | 24.VI.1997 | |
| 4 | Hummock with prostate vegetation (Ambrosia chamissonis) (sand without straw) | " " | " " | |
| 5 | Crest of retention ridge (Lupinus chamissonis) (sand mixed with straw from straw plugs) | " " | 19, 20, 24.VI.1997 | |
| 3b | 1 | Sheltered dune plain with woody scrub cover (Lupinus chamissonis) (sand without straw) | 35° 02' 00" N 120° 36' 54" W | 20.VI.1997 |
| 2 | Sheltered dune plain with woody scrub cover (Lupinus chamissonis) (sand mixed with straw from straw plugs) | 35° 01' 39" N 120° 36' 40" W | 24.VI.1997, (malaise traps: 19-25.VI.1997) | |
| 3a-4 | 1 | Crest of retention ridge under Salix lasiolepsis (sand without straw) | " " | 24.VI.1997 |
| 2 | Hummock under Salix lasiolepsis (sand without straw) | " " | " " | |
| C. Backdunes, west of Mills Farms. | ||||
| Zone | Site | site description | coordinates | date(s) sampled |
| 3a | 1 | Open dune ridge | 35° 01' 33" N 120° 37' 16" W | 22.VI.1997 |
| 2 | Dune plain north of stabilized dune hill with herbaceous prostate vegetation | 35° 01' 19" N 120° 37' 24" W | " " | |
| 3 | Open dune plain adjacent to Zone 3b, Site 2 | 35° 01' 03" N 120° 37' 24" W | " " | |
| 3a-3b | 1 | Dune slope (north face) of stabilized dune hill (Artemisia californica, Lotus scoparius) | 35° 01' 19" N 120° 37' 24" W | " " |
| 3b | 1 | Sheltered dune plain with woody scrub cover (Lupinus chamissonis, Ericameria ericoides) | 35° 01' 03" N 120° 37' 24" W | " " |
| 2 | Sheltered dune plain (Ammophila arenaria) | 35° 01' 05" N 120° 37' 36" W | " " | |
| 3 | Extensive dune plateau with scrub cover (Artemisia californica, Baccharis pilularis), sand bound by a surface layer of moss and lichen in many areas | 35° 01' 19" N 120° 36' 56" W | " " | |
| 3b-4 | 1 | Sparsely forested (Quercus agrifolia) slope northeast of dune plain under woody scrub (Artemisia californica, Baccharis pilularis) | 35 01.311N 120 36.929W | 24.VI.1997 |
| 4 | 1 | Forested northeast border of dune plateau (Populus trichocarpa) | 35° 01' 19" N 120° 36' 56" W | 22.VI.1997 |
| 2 | Forested northeast border of dune plateau (Cupressus macrocarpa) | " " | 24.VI.1997 | |
| 3 | Forested northeast border of dune plateau (Eucalyptus globulus) | " " | " " | |
| 5 | 1 | Swale thicket (Salix lasiolepis, Lupinus chamissonis, Toxicodendron diversilobum) with grassy undergrowth (Carex spp.) | 35° 01' 03" N 120° 37' 24" W | " " |