Festooned curtain of Wax- Workers 113 



Commencement of the combs 115 



Huber's histoi j of his experiments lb. 



Secretion of wax 116 



Funiiiliitionofthr flratceil 117 



Workers extract their own wax 118 



View of the proceedings obstructed ..... 119 



CHAPTER VI. 



Form of the colls 120 



Mathematical problem solved bv Bees 121 



Calculated by Maraldi and Ku-n'ig ib. 



Reasons for the form of the cells 122 



Referred to the form of the Bee ib. 



Experiments of Huber 123 



Cells commenced in the foundation-wall . . . .125 



Deepening of the cells . . . . . . 127 



Polishing by Nurse-Bees 128 



Distance of the combs from each other 129 



Dr. Barclay's discovery 130 



Irregularities in their workmanship 131 



Anecdote from Dr. Bcvan ib. 



Similar anecdote from Huber ..'... 132 

 Symmetry in the architecture of Bees explained . . .133 



Curved combs 134 



Experiments of Huber ib. 



Size of male cells '. , .136 



Cells enlarged when honey is plentiful lb. 



The finishing of the cells 137 



VarntBhed with propolis 138 



Strengthened with pissoeeros lb. 



Discovery by Huber 139 



Cells strengthened by the Bee-grubs 140 



Difficulties explained 141 



Mistake of an American writer 142 



Curious experiment of Huber .... . ib. 



Wild-Honey lleos ib. 



Wild-Bees of America, Ireland, Palestine . . . .143 



Honey-guide ot Africa 145 



Bee-hunting in America 146 



CHAPTER VII. 



Carpentry of Tree-hoppers (Cicada') 147 



Mistaken for grass-hoppers ib. 



Singular cutting instrument of the Tree-hopper . . .148 



Double flies of 150 



Their nests 151 



Stw-Fllei 152 



Their ovipositor .153 



Structure of 154 



Comb-tooth rasp, and saw 156 



Grooves cut by it in the rose-tree 158 



CHAPTER VIII. 



Leaf rolling caterpillars 159 



Lilae Leaf-roller ....... . 160 



