These parasites illustrate mimicry, already described, as they look so like the foster mothers of their own young, that unscientific eyes would often fail to distinguish them. Probably the bumble-bees are no sharper, or they would refuse ingress to these merciless vagrants. The larvæ (Fig. 12) of all insects of this family are maggot-like--wrinkled, footless, tapering at both ends, and, as before stated, feed upon pollen and honey. They are helpless, and thus, all during their babyhood--the larvæ state--the time when all insects are most ravenous, and the only time when many insects take food, the time when all growth in size, except such enlargement as is required by egg-development, occurs, these infant bees have to be fed by their mothers or elder sisters. They have a mouth with soft lips, and weak jaws, yet it is doubtful if all or much of their food is taken in at this opening. There is some reason to believe that they, like many maggots--such as the Hessian-fly larvæ--absorb much of their food through the body walls. From the mouth leads the intestine, which has no anal opening. So there are no excreta other than gas and vapor. What commendation for their food, _all_ capable of nourishment, and thus all assimilated. To this family belongs the genus of stingless bees, Melipona, of Mexico and South America, which store honey not only in the hexagonal brood-cells, but in great wax reservoirs. They, like the unkept hive-bee, build in hollow logs. They are exceedingly numerous in each colony, and it has thus been thought that there were more than one queen. They are also very prodigal of wax, and thus may possess a prospective commercial importance in these days of artificial comb-foundation. In this genus the basal joint of the tarsus is triangular, and they have two submarginal cells, not three, to the front wings. They are also smaller than our common bees, and have wings that do not reach to the tip of their abdomens. Another genus of stingless bees, the genus Trigona, have the wings longer than the abdomens, and their jaws toothed. These, unlike the Melipona, are not confined to the New World, but are met in Africa, India and Australasia. These build their combs in tall trees, fastening them to the branches much as does the Apis dorsata, soon to be mentioned.