1987] 
Gordon & Holldobler — Harvester ants 
343 
Table 1. Numbers of marked ants observed as a function of days elapsed since 
ants were marked. M = midden workers, PT = patrollers, F = foragers, NM = nest 
maintenance workers. 
Days since 
marking 
P. barbatus 
P. 
rugosus 
F 
M 
PT 
F 
NM 
a.m. 
p.m. 
1 
- 
- 
- 
- 
6 
2 
2 
- 
- 
- 
- 
7 
4 
3 
- 
- 
- 
- 
- 
3 
4 
7 
7 
4 
6 
1 
4 
5 
4 
7 
12 
14 
2 
7 
6 
4 
7 
12 
3 
3 
7 
0 
4 
12 
5 
3 
4 
8 
2 
4 
3 
3 
- 
4 
9 
2 
1 
6 
4 
1 
0 
10 
7 
2 
17 
13 
3 
- 
11 
4 
1 
10 
17 
2 
1 
12 
3 
3 
6 
16 
8 
2 
13 
0 
3 
3 
8 
- 
0 
14 
0 
9 
2 
15 
3 
3 
15 
0 
1 
6 
7 
0 
4 
16 
1 
2 
3 
3 
0 
0 
17 
1 
1 
3 
7 
5 
6 
18 
0 
1 
0 
8 
3 
- 
19 
2 
0 
2 
6 
- 
0 
20 
0 
1 
0 
1 
1 
4 
21 
0 
2 
0 
4 
- 
5 
22 
0 
1 
0 
0 
- 
3 
23 
1 
0 
1 
0 
2 
6 
24 
0 
2 
2 
0 
- 
4 
25 
0 
3 
2 
0 
0 
3 
26 
0 
0 
0 
2 
- 
1 
27 
0 
0 
0 
0 
2 
4 
33 
0 
0 
0 
1 
- 
- 
