1 Vertical cercal fringe poorly developed, sparse on ventral margin and obsolete or absent on dorsal margin (Fig. 25); anterolateral margins of frons slightly slanted, angulate from base of frontoclypeus to labrum (Fig. 21) ….…….. A. usa

1' Vertical cercal fringe well developed on dorsal and ventral margins of several mid to apical segments (Fig. 5); anterolateral margins of frons smoothly rounded between frontoclypeus and labrum (Fig. 1) ………………………..…………. 2

2 Twelve or 13 cercal segments (Fig. 15); Coastal Plains populations generally found south of Jackson, Tuscaloosa, Atlanta line ………………. 3

2' At least 14 cercal segments (Fig. 20); populations found mostly north of Jackson, Tuscaloosa, Atlanta line ……………………………………….. 5

3 Thirteen cercal segments; ventral fringe on foretibiae absent; abdominal terga without mesal pair of pale spots; known from central and southwest Mississippi …………………. A. natchez

3' Twelve cercal segments (Fig. 15); sparse ventral fringe of fine setae on foretibiae (Fig. 14).……. 4

4 Abdominal terga with a pair of pale, round spots (Fig. 13); known from South Carolina … A. furcula

4' Abdominal terga without pale, round spots; known from Alabama and Florida … A. prognoides

5 Posterior pronotal fringe consists of two rather widely spaced long setae at corners (Fig. 16) ….. 6

5' Posterior pronotal fringe consists of 1 or 2 short setae placed between longer setae at corners (Fig. 6) …………………………………………………… 7

6 Vertical cercal fringe begins on segment 10 (Fig. 20); less than 10 outer marginal setae present on mesonotum (Fig. 17) ………..……….. A. imbecilla

6' Vertical cercal fringe begins on segment 12 (Fig. 5); at least 10 outer marginal setae present on mesonotum (Fig. 2) ……………………. A. atlantica

7 Mid fringe setae on abdominal terga 8-9 similar to those located just laterad to innermost long thin setae; mesonotum with about 8 outer marginal setae; vertical cercal fringe begins on segment 9 …………………………………..………. A. petasata

7' Mid fringe setae on abdominal terga 8-9 much thinner and more widely spaced than those located laterad to innermost long thin setae (Fig. 8); mesonotum with about 4 or with about 12 outer marginal setae; vertical cercal fringe begins beyond segment 10 ……………………………….. 8

8 Vertical cercal fringe setae begin on segment 11 (Fig. 10); mesonotum with about 12 outer marginal setae (Fig. 7) …………………. A. concolor

8' Vertical cercal fringe setae begin on segment 13; mesonotum with about 4 outer marginal setae ………………………….………………… A. neglecta