Figs. 3 and 5 are from two minute species of cocktailed beetles (_Staphylínidæ_), which swarm throughout the summer months, and even in the winter may be found in profusion under stones and moss. The insect from which Fig. 5 was taken is so small that it is almost invisible to the naked eye, and was captured on the wing by waving a sheet of gummed paper under the shade of a tree. These are the tiresome little insects that so often get into the eye in the summer, and cause such pain and inconvenience until they are removed. Fig. 4 shows the antenna of the tortoise beetle (_Cássida_), so common on many leaves, and remarkable for its likeness to the reptile from which it derives its popular name. Fig. 3 is from one of the weevils, and shows the extremely long basal joint of the antennæ of these beetles, as well as the clubbed extremity. Fig. 7 is the beautifully notched antenna of the cardinal beetle (_Pyrochróa_), and Fig. 11 is the fan-like one of the common cockchafer. This specimen is taken from a male insect, and the reader will find his trouble repaid on mounting one of these antennæ as a permanent object. Fig. 12 is an antenna from one of the common ground beetles (_Cárabus_) looking like a string of elongated pears, from the form of the joints. The reader will see that in beetles he is sure to find eleven joints in the antennæ. Fig. 10 is the entire antenna of a fly (_Syrphus_), one of those pretty flies which may be seen hovering over one spot for a minute, and then darting off like lightning to hang over another. The large joint is the one on which are found those curious depressions that have already been mentioned. Fig. 8 is one of the antennæ of a tortoise-shell butterfly (_Vanessa_), showing the slender, knobbed form which butterfly antennæ assume; and Figs. 13 and 14 are specimens of moths’ antennæ, showing how they always terminate in a point. Fig. 13 is the beautiful feathery antenna of the ermine moth (_Spilosóma_); and Fig. 14 is the toothed one of the tiger moth (_Arctia caja_). In all these feathered and toothed antennæ of moths, the male insects have them much more developed than the female, probably for the purpose of enabling them to detect the presence of their mates, a property which some possess in wonderful perfection. The male oak-egger moth, for example, can be obtained in any number by putting a female into a box with a perforated lid, placing the box in a room, and opening the window. In the course of the evening seven or eight males are seen to make their appearance, and they are so anxious to get at their intended mate that they will suffer themselves to be taken by hand. Fig. 9 is an antenna of the male gnat, a most beautiful object, remarkable for the delicate transparency of the joints, and the exquisitely fine feathering with which they are adorned. We now arrive at the eyes of the insects, all of which are very beautiful, and many singularly full of interest.