xviii Illustrations 



FIG. '■*'"' 



29. Tool-box seat 32 



30. Alley queen and drone trap * 32 



31. Bee escape board * 32 



32. Comb-foundation cutter 33 



33. Van Deusen hive clamp 33 



34. The honeybee : worker, queen and drone * .... 40 



35. The honeybee : egg, young larva, old larva and pupa * . . 40 



36. Structure of comb * 47 



37. Piece of new comb showing transition cells * .... 48 



38. Queen cell 49 



39. Cappings of brood 50 



40. Capping of honey Facing page 51 



41. Colony in the open air Facing page 51 



42. Eggs in cells of the comb Facing page 55 



43. LarvEe in cells of the comb, almost full grown . . Facing page 65 



44. Concentric arrangement of the brood 57 



45. Group of queen cells * ........ 62 



46. A swarm cluster ... .... Facing page 65 



47. Swarm catcher Facing page 67 



48. Capturing a swarm Facing page 65 



49. Swarm entering a hive Facing page 68 



50. Group of tissue cells from skin of young salamander. (From 



Nelson) . . 95 



51. Three stages in the development of the embryo. (From Nelson) 97 



52. Diagram of a longitudinal median section of a bee larva. (From 



Nelson) 100 



53. Ventral plates of the abdomen of a worker bee. (From Casteel) 108 



54. Inner surface of the left hind leg of a worker bee showing a wax- 



scale. (From Casteel) 108 



56. Ventral view of worker removing wax-scale. (From Casteel) . 109 



56. Side view of worker removing wax-scale. (From Casteel ) . 109 



57. Ventral view of worker passing wax-scale forward. (From 



Casteel) 110 



58. Sideviewof worker passing wax-scale forward. (From Casteel). 110 



59. Median longitudinal section of head of worker, showing the 



glands. (From Snodgrass) Ill 



60. Alimentary canal of worker, showing glands. (From Snod- 



grass) 112 



61. Longitudinal median section of base of cesophagus. (From 



Snodgrass) 1]3 



