74 PROCEEDINGS OF THE ACADEMY OF [1881. 



Fig. 32. Honey-bearer fallen from her perch, being cleansed by 

 a worker, who reaches down from the wall. Page 40, 



Fig. 33. Ilonej'-bearer with (apparently) morbid abdomen. 

 Page 58. 



Fig. 34. Worker nurses feeding and cleansing larvfe. Page 43. 



Fig. 35. Yiew of vertical section of a nest, showing galleries 

 arranged in stories. See PI. V, fig. 16. G, location of gate ; a — ^, 

 e — z, k — Z, galleries ; R, R, sections of honey-rooms. Page 36, and 

 foot-note. 



Fig. 36. A worker dragging a honey-bearer up a perpendicular 

 surface into a galler}^ Page 39. 



Plate YII. 



Fig. 37. Yiew of the under side of the head of Myrmecocystus 

 hortus-deorum, showing the mouth organs. X 20, Page 20. 



The letter-references in this and subsequent anatomical figures 

 are imiform throughout. The Key to References, therefore (p. 

 70), will apply to all figures. 



Fig. 38. Face sculpture of same. X 20, Page 20. 



Fig. 39, Side view of head of worker to show parasitic mites 

 clinging thereto. The mites are about natural size. Page 63. 



Fig. 40 Dorsal view of mites greatly enlarged. 



Fig. 41. Yentral view of same. 



Fig. 42. One of the suckers, su, contracted. 



Figs. 43 and 44, the same further drawn out. 



Fig. 45. Muscles of the honey crop, showing their netted and 

 branched character. X 30, Page 54. 



Fig. 46. The same, from margin of the crop. G. ws, crop 

 muscles ; b. ms, branched muscles. 



Fig. 47. Third leg of 31. 7ior^us-(?eorwm, worker-minor. X 10. 



Fig. 48. Section of segmental plate of abdomen of honey ant, 

 showing hexagonal cells of epithelium, and a bristle-like hair, or 

 seta, arising therefrom. 



Fig. 49. Profile view of segmental plates of Camponotus vijlatus, 

 showing the overlapping of the same, and the imbricated epithelial 

 cells, forming a rachet-like structure which suggests the possibility 

 of a sound-producing organism, e. ab. pl^ exterior abdominal plate ; 

 i, ab. pi, interior ditto. Page 61. 



Fig. 50. Profile view of abdominal plate of M. hortus-deorum^ 

 to show, the same. 



