Abdomen, dark brown hair pencils | Abdomen, hair density | Abdomen, hair patterning | Anal papillae number | Found on turf | Season of activity | Spiracular lobe number | Spiracular lobes, all similar size | Spiracular lobes, dorsal lobe sclerotized apices | Spiracular lobes, hair border along lobes | Spiracular lobes, ventral shape | Thorax, raised welts a pair on prothorax

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Number scored for a state is in green.

1. Abdomen, dark brown hair pencils

17Absent    3Present   



2. Abdomen, hair density

2Short microscopic hairs in coalescing rows with strongly developed setal imprints    18Short microscopic hairs in small separated groups with weak or without setal imprints   



3. Abdomen, hair patterning

1Distinct pattern formed by rows of long and short hairs on dorsum of abdomen    17Hair uniformly distributed   



4. Anal papillae number

124 lobes or less    86 lobes   



5. Found on turf

13Found in soil of turfgrass    7Not found in soil of turfgrass   

6. Season of activity

15July-August    19Sept-June   

7. Spiracular lobe number

35 lobes or fewer    176 lobes   



8. Spiracular lobes, all similar size

11All lobe equal length and shape    9Ventral lobes smaller than other lobes   



9. Spiracular lobes, dorsal lobe sclerotized apices

15Absent    2Present   



10. Spiracular lobes, hair border along lobes

10Absent    10Present   



11. Spiracular lobes, ventral shape

2Small with truncate apex    17Triangular with rounded apex   



12. Thorax, raised welts a pair on prothorax

16Absent    3Present