Because they may serve as the gates of the city; according to Reaumur, one of them is for ingress and the other for egress; and such is the order observed, that the uses of the respective doors are rarely if ever changed. The cells of the nest or vespiary, are solely constructed to lodge the young, and on an average a nest may contain about 16,000 cells, which are filled thrice in each year.
Years productive of the plum are said to be congenial likewise to the wasp. A local rhyme will have it,
When the plum hangs on the tree, Then the wasp you're sure to see.
Because it bears the fly about with it for a length of time, and drops it unconsumed.
" Because it is united to a living plant, so that when the insect attempts to rise from the nest, it falls to the ground, on account of the weight of the plant, which takes root on some part of the body, particularly on the breast-bone. It was long thought that these plants grew on insects deprived of life. M. Ricord has, however, determined otherwise, and has observed that the larvae in the cells also have this vegetating appendage, but then it is very small. - Journal de Pharmacie.