302 
Psyche 
[December 
Ashton-Ashton 
Populations from three colonies (#3, #4, #5), were collected at Ash¬ 
ton Park on January 3, 1973, and tested on January 5. Colonies #3 
and #4 were taken about 100 yards apart. Colony #5 was separated 
from the other two by about 1/2 mile. Following are the results: 
#3 X #4 Test #1—Divaricated mandibles, no attack. (C) 
Test #2—Same, close mutual examination, then mutual 
grooming, entire compatibility. (C) 
#3 X #5 Test #1—Opened mandibles for a moment, then entire 
compatibility (D) 
Test #2—Opened mandibles, then entire compatibility. 
(D) 
#4 X #5 Test #1—Entire compatibilty. (D) 
Test #2—Brief pursuit, with opened mandibles. (C) 
Sutherland-Sutherland 
Two colonies were used, taken in this case approximately 3 miles 
apart in the study area on January 23, 1973, and tested two days 
later, on January 5, 1973. They were labeled #1 and #2: 
#1 X #2 Test #1—Entirely compatible (D) 
Test #2—Initial alarm with open mandibles and momen¬ 
tary seizure, passing to entire compatibilty (C) 
Ashton-Sutherland 
When workers from the two populations were tested against one 
another, the results were very different. These tests were performed 
on the same day as those above. 
#1 X #3 Test #1—Extreme incompatibility, with active fighting 
(A) 
Test #2—Extreme incompatibility. Pursuit but no seizure. 
(B) 
#1 X #4 Test #1—Continuous open-mandibled aversion (B) 
Test #2—Open-mandibled aversion. (B) 
#1 X #5 Test #1—Open-mandibled aversion, no actual attack. (B) 
Test #2—Continuous attacks, with frequent seizures (A) 
#2 X #3 Test #1—Vigorous and continuing attacks (A) 
Test #2—Open-mandibled encounters frequently repeated 
(B) 
