In the genus Eumenes the males are much smaller than the females....

If the egg is male, she supplies five; if female, 10 victims.

Does she count?
Certainly this seems very like a commencement of arithmetic."[4] Many writers do not agree with the conclusions which Lubbock reaches; maintaining that there is, in all such instances, a perception of greater or less quantity rather than any idea of number.

But a careful consideration of the objections offered fails entirely to weaken the argument.

Example after example of a nature similar to those just quoted might be given, indicating on the part of animals a perception of the difference between 1 and 2, or between 2 and 3 and 4; and any reasoning which tends to show that it is quantity rather than number which the animal perceives, will apply with equal force to the Demara, the Chiquito, and the Australian.