XIX. OF WHAT USE ARE FLIES 66 XX. A SWARM OF FLIES 68 XXI. SOME QUEER FLIES 71 XXII. IN ARMOR CLAD 73 XXIII. WHEN MR. BEETLE WAS YOUNG 78 XXIV. HOW TO LEARN ABOUT BEETLES 81 XXV. THE ROSE BEETLE 84 XXVI. PRINCES AND GIANTS 88 XXVII. THE LITTLE SEXTON 92 XXVIII. THE STORY OF THE STAG BEETLE 97 XXIX. MR. BEETLE SEEKS FOR A HOME 101 XXX. THE LITTLE WATER-MEN 105 XXXI. WHIRLIGIG BEETLES 110 XXXII. WHAT A FISHERMAN TOLD 113 XXXIII. MR. BARNACLE AND HIS SON 116 XXXIV. A FISHING PARTY 121 XXXV. A LAST LOOK AT MR. BARNACLE 125 XXXVI. FLOWERS OF THE SEA 127 XXXVII. THE LIFE OF A JELLY-FISH 131 XXXVIII. SEA-STARS 137 XXXIX. A SEA-CHANGE 141 XL. THE STAR-FISH WITH AN OVERCOAT 145 XLI. THE FLYING FLOWERS 151 XLII. UNDER THE WATER 155 XLIII. A HAPPY CHANGE 160 XLIV. THE DRAGON-FLY AND HIS COUSINS 164 XLV. THE WINGS OF THE DRAGON-FLY 167 REVIEW LESSONS 173 SEASIDE AND WAYSIDE. LESSON I. A LOOK AT AN ANT. You have been told[1] that an insect is a living creature with a body made in rings, and divided into three parts. Most insects have six legs, four wings, and two feelers. There is a great Order of insects which we shall call the hook-wing family. [Illustration: The Wasp.] The wasp, the bee, the saw-fly, and ant belong to this family. They are the chief of all the insects. They can do many strange and curious things. You will know insects of this great family by their wings. The front wings are larger than the back ones. They fold back over them when at rest. In flight the upper wings hook fast to the lower.[2] If you look carefully at some kinds of insects, you will soon think I have told you what is not quite true. Why will you think that? You will say to me, “The fly has two wings, and not four.” “The ant has no wings at all.” [Illustration: The Bee.] Ah, but wait until you study about ants and flies, and see what you will think then. The mouth of all the hook-wing insects has two jaws for cutting or for carrying things. The mouth is nearly as wide as the head. Above the mouth are two knobs. These knobs are two big eyes, one on each side of the head. Between the two big eyes they have some little ones, on the top of the head. You see insects are as well supplied with eyes as crabs are with legs.