Examine this grappling apparatus with one fourth inch power and with the needles hook the wings together and pull them apart. If you look through the magnifier while you do this you will get a good idea of the form of the ridge and of how the hooks catch onto it. Remove one of the forelegs, being sure that none remains attached to the body. Examine with one and one half inch power. The extremity is armed with two claws; then come four short joints followed by one about as long as the others together. All these make up the foot. The next joint above is the shank, then comes the thigh and then quite a small joint, the lower hip, and lastly attached to the body is the upper hip. Remove the last five joints of the foot (the claw part, and the other four joints) examine with one third inch power. The claws have each a branch projecting from the inner edge. Between the claws is a little velvety pad. Each of the small joints is covered with short closely appressed hairs and from the lower end of each joint project several spines. Now examine the remaining long joint of the foot attached to the shank. At the upper end of the inner side is a deep semicircular notch, the upper portion of which is light colored. Beside the notch is a peculiarly shaped movable spine which projects from the lower end of the shank. This queer arrangement is what the bee uses to clean his feelers. The reader has probably seen the operation performed by a bee or a wasp. The leg is thrown over the feeler, the latter is grasped at that particular bend of the leg where the cleansing apparatus is situated and then drawn through from base to tip; and this is repeated several times with each feeler. Examine with one and one half inch power a leg from each of the other pairs and compare the corresponding parts. They differ chiefly in size and in the absence of the cleansing apparatus. You cannot fail to admire the many beautiful forms of the different portions. On the outer side of the hind shank is a smooth flattish surface destitute of hairs, excepting a fringe of long ones at the margin. At this place may sometimes be found a sticky mass of pollen intended for bee-bread. Examine the abdomen with one and one half inch power. It is composed of several wings. If some of the hairs are scraped off this will be shown more clearly. From the hind extremity projects the sting. We have far from exhausted all the beautiful and interesting points in the make-up of a Bumble Bee, not even those that may be seen with the limited powers of a simple microscope; but probably enough has been said to show the reader that such things are well worthy of study and it is hoped that enough directions have been given to render future use of the instruments comparatively free from difficulty. XV.--SOME LITTLE THINGS TO SEE.