336 
Psyche 
[December 
0 6 12 18 24 
5 
0 
5 
0 
0 
Fig. 1. Worker rhythms, field nest. No./Minute passing each way, and 
No. Out (only near nest, not total out foraging). Means ± SE are based 
on 2-4 days (Jan. 11-21) for No. Out, and on 2-3 days (Jan. 19-21) for 
No./Minute; thus N = 2-4, except for the midnight No./Minute points 
based on only 1 night (infinite SE shown by dotted line). One-way analy- 
ses of variance (ANOVA’s) indicate the various hours of day to differ: 
Outward, P<.001; Inward, P<.01; No. Out, P<.30 (not significant). 
Dawn and dusk lines drawn at times when first or last barely light enough 
to see ants. 
a half meter, but failed to reach the heart of the nest, since we found 
no queen, pupae or eggs. Buckets of water were used in a futile 
attempt to drown the ants out. About ten half-grown larvae were 
seen and collected, as well as several winged males and females. 
Three to four hundred workers were collected, and at least another 
hundred were seen. Bequaert (1926) mentions a nest that contained 
500 workers. Mann (1916) says the colonies are small. 
We placed the ants one by one with forceps into tall narrow- 
necked bottles. The man who stood guard and held the bottle not 
only kept the lid poised for immediate capping, but also kept the 
ants shaken down from near the top; because, unfortunately, though 
2 cm long the ants could climb the glass readily. For transport they^ 
were put into a gallon jar mostly filled with leaves. 
