xviii Illustrations 
no. PASS 
29. Tool-box seat . 82 
30. Alley queen and drone trap * .32 
31. Bee escape board * . ... i ... . 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 . 60 
40. Capping of honey . Facing page 51 
41. Colony in the open air . Facing page 61 
42. Eggs in cells of the comb . Facing page 65 
43. Larvae in cells of the comb, almost full grown . . Facing page 55 
44. Concentric arrangement of the brood . 67 
46. Group of queen cells *. 62 
46. A swarm cluster . Facing page 66 
47. Swarm catcher . Facing page 67 
48. Capturing a swarm . Facing page 66 
49. Swarm entering a hive .Facing page 68 
60. Group of tissue cells from skin of young salamander. (From 
Nelson) . 96 
61. Three stages in the development of the embryo. (From Nelson) 97 
62. Diagram of a longitudinal median section of a bee larva. (From 
Nelson). 100 
63. Ventral, plates of the abdomen of a worker bee. (From Casteel) 108' 
64. Inner surface of the left hind leg of a worker bee showing a wax- 
• scale. (From Casteel). 108 
65. Ventral view of worker removing wax-scale. (From Casteel) . 109 
66. Side view of worker removing wax-scale. (From Casteel ) . 109 
57. Ventral view of worker passing wax-scale forward. (From 
Casteel). 110 
58. Side view of worker passing wax-scale forward. (From Casteel) . 110 
69. Median longitudiual 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 oesophagus. (From 
Snodgrass).113 
