In view of the serious nature of this pest and the difficulty in the way of its extinction, I would urge importers, and people receiving imported queens, to be very careful to see that these lice, which, from their size, are so easily discovered, are surely removed before any queen harboring them is introduced. This advice is especially important, in view of the similarity in climate of our own beautiful South, to the sunny slopes of France and Italy. Very likely the lice could not flourish in our Southern States, but there would be great cause to fear the results of its introduction into our Eldorado, the genial States of the West. In California, they might be even worse than the drouth, as they might come as a permanent, not a temporary evil. BEE HAWK--_Libellula_. This large, fine lace wing is a neuropterous insect. It works in the Southern States and is called Mosquito-hawk.--Insects of the same genus are called dragon flies, devil's, darning-needles, &c. These are exceedingly predacious. In fact, the whole sub-order is insectivorous. From its four netted, veined wings, we can tell it at once from the asilus before mentioned, which has but two wings. The Bee or Mosquito-hawk is resplendent with metallic green, while the Bee Killer is of sober gray. The Mosquito Hawk is not inaptly named, as it not only preys on other insects, swooping down upon them with the dexterity of a hawk, but its graceful gyrations, as it sports in the warm sunshine at noonday, are not unlike those of our graceful hawks and falcons. These insects are found most abundant near water, as they lay their eggs in water, where the larvæ live and feed upon other animals. The larvæ are peculiar in breathing by gills in their rectum. The same water that bathes these organs and furnishes oxygen, is sent out in a jet, and thus sends the insect darting along. The larvæ also possess enormous jaws, which formidable weapons are masked till it is desired to use them, when the dipper-shaped mask is dropped or unhinged and the terrible jaws open and close upon the unsuspecting victim, which has but a brief time to bewail its temerity. A writer from Georgia, in _Gleanings_, volume 6, page 35, states that these destroyers are easily scared away, or brought down by boys with whips, who soon become as expert in capturing the insects, as are the latter in seizing the bees. The insects are very wild and wary, and I should suppose this method would be very efficient. [Illustration: Fig. 110.] TACHINA FLY.