RELATION BETWEEN ANTS. 147 
in their turn different curves, and stop- 
ping to strike with their heads all those 
they met on their passage. In one mo- 
ment the signal was general, all the la- 
bourers ran over the surface of the tree 
with great agitation, those within re- 
ceiving notice of the danger, and proba- 
bly by the same means, came out in a 
crowd and joined this tumult. The 
same signal which precuced upon the 
workers this effect, causcla different im- 
pression upon the males and females; as 
soon as one of the labourers had informed 
them of their danger, they sought an 
asylum, and re-entered precipitately the 
trunk of the tree ; — not one thought of 
quitting its temporary shelter, until a 
worker approached and gave them the 
signal for flight. The solicitude of the 
labourers in their favour, is manifested in 
the activity they display, in giving them 
advice or intimating to them the order 
for their departure ; they redouble then 
the above signals, as if conscious of their 
understanding their intent less readily 
H 2 
