1977] Buschinger & Alloway — Harpagoxenus americanus 111 
Table II: Numbers of fertile and sterile workers 
in queenright and queenless colonies. 
Colony 
no. 
queen 
workers and intermorphs (I) 
sterile with growing with grow.ooc. 
oocytes and 
corpora lutea 
Harpagoxenus 
d5S 
produced + ) 
date of 
collection 
1 
1 
_ 
3 
1 
3 
5 
S 
VI-12-77 
2 
1 
1 
2 
- 
3 
* 
s 
VI-12-77 
3 
1 
3 
- 
- 
3 
5 
S 
VI-12-77 
4 
1 
8 
- 
- 
s 
VI-13-77 
5 
1 
1 
- 
- 
s 
VI-24-77 
6 
1 
2 
- 
- 
25 
4s 
VI-16-77 
7 
1 
4 
- 
- 
s 
VII-1 7-77 
8 
- 
1 
- 
- 
4tJ 
4$ 
2S 
VI-12-77 
9 
- 
1(1) 
1 
- 
23 
25 
2S 
VI-12-77 
10 
- 
1 
- 
- 
17S 
Vl-24-77 
11 
- 
2 
1 
- 
13 
1 ¥ 
7S 
VI-16-77 
12 
- 
2 
1 
- 
3 
5 
S 
VI-22-77 
13 
- 
- 
- 
1 
3 
S 
VII-1 -77 
14 
- 
- 
4 
4+1(1) 
113 
1 5 
8S 
VI-12-77 
15 
- 
- 
- 
1 
5d 
4s 
VI-14-77 
16 
- 
2 
- 
3 
73 
VI-14-77 
17 
- 
- 
3 
1 
1 03 
IS 
VI-22-77 
18 
- 
- 
- 
1 
4s 
VI-24-77 
19 
- 
- 
1 
1 
34 3 
1 5 
VI-27-77 
20 
- 
3 
- 
1 
10<J 
2S 
VII-1 -77 
21 
- 
- 
2 
KD 
1 5<J 
VI-16-77 
22 
- 
- 
- 
1 
11 3 
VI-22-77 
23 
- 
- 
- 
1 
3 
VI-27-77 
24 
- 
1 
3 
5 
103 
VII-1 -77 
25 
- 
2 
- 
2 
52 3 
VII-1 -77 
) Numbers are indicated where the production could 
be completely recorded 
no dealate queen. None of the workers had a spermatheca, but 
most of them had a rather large number of ovarioles. More spe- 
cifically, we found 2 workers with 2 ovarioles, 1 with 3, 6 with 5, 
81 with 6, and 1 with 7. Thus, most workers have the same num- 
ber of ovarioles as queens. About half (45) the workers had short, 
thin ovarioles that contained no developing oocytes. These indi- 
viduals were completely sterile. However, the other 46 workers 
manifested varying degrees of fertility. A total of 22 individuals 
possessed ovarioles containing white oocytes (a fact indicating that 
yolk has been deposited in the growing eggs); and 24 workers had 
actually begun to lay eggs, as indicated by the fact that there were 
