The second pair of legs transfer the pollen to the hind legs, where it is heaped up in the pollen masses. The tibia of each hind leg is depressed on its outer side, and upon the edges of this depression stand two rows of stiff hairs which are bent over the groove. The brushes of the middle pair of legs rub over these hairs, liberating the pollen, which drops into the baskets. A suggestion of the true method is given by Hommell (1906), though his statements are somewhat indefinite. After describing the method by which pollen is collected, moistened, and passed to the middle legs he states that (translated) "the middle legs place their loads upon the pollen combs of the hind legs. There the sticky pollen is kneaded and is pushed across the pincher (_à traverse la pince_), is broken up into little masses and accumulates within the corbicula. In accomplishing this, the legs cross and it is the tarsus of the right leg which pushes the pollen across the pincher of the left, and reciprocally. The middle legs never function directly in loading the baskets, though from time to time their sensitive extremities touch the accumulated mass, for the sake of giving assurance of its position and size." The recent valuable papers of Sladen (1911, 1912, _a_, _b_, _c_, _d_, and _e_), who was the first to present a true explanation of the function of the abdominal scent gland of the bee, give accounts of the process by which the pollen baskets are charged, which are in close accord with the writer's ideas on this subject. It is a pleasure to be able to confirm most of Sladen's observations and conclusions, and weight is added to the probable correctness of the two descriptions and interpretations of this process by the fact that the writer's studies and the conclusion based upon them were made prior to the appearance of Sladen's papers and quite independent of them. His description of the basket-loading process itself is so similar to the writer's own that a complete quotation from him is unnecessary. A few differences of opinion will, however, be noted while discussing some of the movements which the process involves. As will later be noted, our ideas regarding the question of pollen moistening, collecting, and transference are somewhat different. ADDITIONAL DETAILS OF THE BASKET-LOADING PROCESS.