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Psyche 
[June 
the artificial Daceton trails. Moser (1965) has demonstrated that 
another cockroach species, Attaphila fungicola, follows artificial at- 
tine trails, and Echolls (1965) has seen this cockroach on trails of 
A. texana in the early morning (1 a.m.) Obviously these blattids 
can maintain a close association with their A tta hosts because of their 
ability to follow the odor trails of the ants. Thus, since members 
of the genus Attaphila appear to be following the same trail 
substance as the attines employ, these cockroaches would be expected 
to follow artificial Daceton trails if their venom contained an attine 
trail pheromone. It should be added that the Attaphila also follow 
artificial trails of both Acromyrmex species, as they would be expected 
to do. 
The evidence concerning Sericomyrmex is also circumstantial but 
is equally persuasive. Previously it had been shown that there was 
no specificity in the trail substances produced by four attine genera 
which encompassed the broad phylogenetic spectrum of the tribe 
Attini (Blum et al., 1964). Since these attines follow each other’s 
odor trails, then they would be expected to follow the artificial 
Daceton trails if these trails contained a substance which was chemi- 
cally similar to their apparently common odor trail pheromones. On 
the other hand, if an attine produced a trail substance which was 
different from the one being employed by these several attine genera, 
then this attine would respond neither to the artificial trails of these 
other attine genera nor to the Daceton trail. Sericomyrmex urichi is 
the first member of an attine genus which has been shown not to 
respond to the artificial trails prepared from the poison gland secre- 
tions of other attine genera. Weber (1966) considers Sericomyrmex 
a somewhat aberrant member of the higest genera and it is certainly 
distinguished from at least two of the other higher attine genera by 
this apparent employment of a different trace constituent as an odor 
trail pheromone. 
The other gland associated with the sting, Dufour’s gland, also 
has been shown to be an unexpected source of a myrmicine trail phero- 
mone. Wilson and Pavan (1959) reported that the Dufour’s gland 
secretion of the dolichoderine Monads hispinosa (Olivier) contained 
a powerful trail substance for the fire ant Solenopsis saevissima (Fr. 
Smith) which produces its trail substance in Dufour’s gland. How- 
ever, M. hispinosa synthesizes its own trail pheromone in Pavan’s 
gland, a special organ which lies on the sixth abdominal sternite. 
Thus the function of the Dufour’s gland secretion in M. hispinosa 
is completely unknown but it is obviously not employed for laying 
odor trails. It seems eveident that M . hispinosa , like Daceton J pro- 
