THE SUBFAMILY LABELLULIN^. 



50. Abdomen with segments 2-4 distinctly carinated *71. Cannaphila. 



Abdomen with segments 2 and 3 carinated. (51.) 



51. Size rather small ; several cross nervures in lower basal 



_ ceU of hind ™ n S s 73. Calothemis. 



Size large ; more than one cross nervure in the lower basal 



cell of fore wings only * 43< Thermorthemis. 



52. One or more supratriangular nervures. (53.) 

 No supratriangular nervures. (63.) 



53. Sectors of the arculus separated, or rising from a point or 



very short stalk. (54.) 

 Sectors of the arculus distinctly stalked. (57.) 



54. Abdomen slender, nodal sector nearly straight, or not 



much waved beyond the middle *17. Celithemis. 



Abdomen stout or moderately thick ; nodal sector always 

 much waved beyond the middle. (55.) 



55. Wings and pterostigma long; abdomen moderately stout, 



long and tapering * 42 . Holotania. 



"Wings short or moderately long ; abdomen stout, not very 

 long. (56.) 



56. Pterostigma short or moderately long; abdomen short, 



stout, and tapering *3 9# Leptetrum. 



Pterostigma long ; abdomen shorter than the hind wings, 



only slightly tapering *40. PMhemis. 



57. Base of the pterostigma pale «53. Hemistigma. 



Pterostigma unicolorous. (58.) 



58. Triangle of fore wings free 76. Diplacina. 



Triangle of fore wings traversed. (59.) 



59. Base of triangle of hind wings lying considerably beyond 



the arculus * 4a Agrionoptera. 



Base of triangle of hind wings nearly on a level with the 

 arculus. (60.) 



60. Abdomen not distinctly thickened at base. (61.) 

 Abdomen always distinctly thickened, and sometimes in- 

 flated at base *65_ Orihetrum. 



61. Abdomen slender * 16# p seu d i eon . 



Abdomen stout. (62.) 



62. Fore wings with three rows of post-triangular cells .... 44. ProtortJiemis. 

 Fore wings with four or five rows of post-triangular cells . *43. Thermorthemis. 



63. A wide space between the last postnodal cross nervure 



and the pterostigma 30. Macrodiplax. 



Space between the last postnodal cross nervure and the 

 pterostigma hardly wider than that between the cross 

 nervures themselves. (64.) 



64. Sectors of the arculus separated, or rising from a point 



or very short stalk. (65.) 

 Sectors of the arculus distinctly stalked. (75.) 



261 



Haiti, Jamaica. 



E. Indies. 

 Africa. 



America. 



America. 



Europe, Asia, Ame- 

 rica. 



America. 

 Africa. 



Philippines. 



E. Indies. 



Old World. 

 Mexico. 



E. Indies. 

 Africa. 



Ceram, Philippines. 



