296 
Psyche 
[December 
as late as sunrise, another position to the right; etc. As far as pos- 
sible, only summer records were used so as to make directly com- 
parable. 
It can be seen that the species in Acanthornyops , in Formica , and 
in Cataglyphis are closely grouped within each genus. The species 
in Lasius appear less so, but they barely overlap those of Formica or 
Cataglyphis. 
(none) night sunrise morning midday 
X 
X 
x Acanthomyops 
X 
X 
X 
Lasius 
X X 
X 
(X) 
X X 
X 
X 
Myrmecocystus 
(X) 
X (X) X 
(X) 
X X 
(X) 
X X 
X X 
X X 
Formica * 5 
XXX 
X 
Cataglyphis 
X 
x 
X 
(X) 
X 
Figure I 
