Products of Insects 104 Propolis or Bee-Glue 112 function of 113 nature of 112 source of 112 Publications 19 American Bee Journal 19 Bee-Keepers' Magazine 21 Gleanings in Bee Culture 20 Pupa 68 figure of 69 Queen 71 brood from eggs 78, 164 cages 184 cell 75 figure of 109, 167 introduction of 167 figure of 167 when started 164 where built 164 figure of 109 clipping wing of 168 how done 169 not injurious 168 why done 169 cocoon of 77 development of 75 eggs of 80, 81 how impregnated 81 Wagner's theory 81 fecundity of 83, 84 figure of 72 food of larvæ 76 function of 83 how procured 185 importance of 163 impregnation of 78 only on the wing 79 introduction of 183 laying of 82 longevity of 83 must have empty cells 188 never to be wanting 163, 176 never to be poor 186 no sovereign 85 ovaries of 72 figure of 64 oviduct of 64 piping of 102 rearing of 78, 163, 186 sex of 71 shipping 186 size of 72 spermatheca of 72 sterility of 83 sting of 71