This was her last visit for the evening, and she thus made no less than 116 visits in the day, during which time only three other wasps found the honey, though it was lying exposed on a table at an open window. It will be seen that she worked with the utmost industry.

No doubt, however, if a wasp is put to honey in an exposed place, other wasps gradually find their way to it. In the preceding experiments some few, though but few, did so. I then thought I would try a similar experiment with concealed honey. Accordingly, on September 20, I marked a wasp and put her to some honey, which she visited assiduously. The following morning I opened my window at 6, and she made her first visit at 6.27, the temperature being 61° Fahr. I then placed the honey in a box communicating with the outside by an india-rubber tube 6 inches long and inch in diameter. The wasp, however, soon got accustomed to it, and went in and out without much loss of time. The 22nd was finer; and

when I opened my window at 6 in the morning, she was already waiting outside, the temperature being 61°. The 23rd was rather colder, and she came first at 6.20, the temperature being again 61°.

I was not at home during these days; but, as far as I could judge from watching in the mornings and evenings, no other wasp found the honey. On the 24th I had a holiday, and timed her as follows. It was rather colder than the preceding days, and she did not come till 6.40, when the temperature was 58°. She returned as follows:

I had almost closed the window so that she had a

difficulty in finding her way.

The temperature was still only 60°, and it was rain

ing, scarcely any other wasps about.

I have no doubt some wasps would make even more journeys in a day than those recorded above.

The following are descriptions of some new species referred to in the preceding pages. The first is the Australian honey ant.

CAMPONOTUS INFLATUS, n. sp. Operaria.-Long. 15 mill. Nigra, tarsis pallidioribus; subtiliter coriacea, setis cinereo-testaceis sparsis; antennis tibiisque haud pilosis; tarsis infra hirsutis; mandibulis punctatis, hirsutis, sexdentatis; clypeo non carinato, antice integro; petioli squama modice incrassata, antice convexa, postice plana emarginata. Hab. Australian.

The colour is black, the feet being somewhat paler. The body is sparsely covered with stiff cinereo-testaceous hairs, especially on the lower and anterior part of the head, the mandibles, and the posterior edge of the thorax. The head and thorax are finely coriaceous.

The antennæ are of moderate length, twelvejointed; the scape about one-third as long as the terminal portion, and somewhat bent. At the apex of

1 In the Linnæan Journ. v. I have given figures of this species.