CHIRONOMUS. 153 



b b. Wings spotted. Species 43. 



a a a a. Fore metatarsus longer than the fore tibia by one-half. 

 b. Wings banded or spotted. Species 44, 45. 

 b b. W T ings not banded or spotted. 



c. Thorax black. Note. In the female of C. pedellus the thorax 

 is green, with three black stripes. 

 d. Abdomen black. 



e. Tarsi white towards the base. Species 46. 

 e e. Tarsi not white towards the base. Species 47-50. 

 d d. Abdomen green. Species 51, 52. 

 c c. Body blackish-green. Species 53. 

 c c c. Thorax brown or grey, with three black stripes. Species 



54, 55. 



c c c c. Thorax pale, with three black stripes. Species 56-61. 

 c c c c c. Thorax pale, with three brown stripes. Species 62-64. 

 c c c c c c. Thorax pale, with three pale stripes. Species 65-73. 

 c c c c c c c. Thorax pale, not striped. Species 74. 

 a a a a a. Fore metatarsus longer than the fore tibia by one-quarter. 

 b. Wings not spotted. 



c. Thorax black. Species 75-77. 



c c. Thorax piceous. Species 78. 



c c c. Thorax grey, with three black stripes. Species 79-81. 



c c c c. Thorax pale. 



d. Thorax with three black stripes. Species 82, 83. 

 d d. Thorax with three brown stripes. Species 84, 85. 

 d d d. Thorax with three pale stripes. Species 86-88. 

 b b. Wings spotted. Species 89. 



a a a a a a. Fore metatarsus longer than the fore tibia by one-fifth. 

 b. Thorax black. Species 90-94. 

 b b. Thorax hoary, with three black stripes. Species 95. 

 b b b. Thorax pale. 



c. Thorax with three black or brown stripes. Species 96-103. 

 a a a a a a a. Fore metatarsus longer than the fore tibia by one-sixth. 



Species 104. 



A A. Fore metatarsus and fore tibia of equal length. 

 a. Thorax black. Species 105-107. 



a a. Thorax pale, with three darker stripes. Species 108-112. 

 A A A. Fore metatarsus shorter than the fore tibia. 



a. Fore tibia longer than the fore metatarsus by one-seventh. Species 



113. 

 a a. Fore tibia longer than the fore metatarsus by one-sixth. Species 



114-117. 

 a a a. Fore tibia longer than the fore metatarsus by one-fifth. Species 



118. 



a a a a. Fore tibia longer than the fore metatarsus by one-fourth. 

 b. Thorax black. Species 119-125. 

 b b. Thorax pale, with three black stripes. Species 126-131. 



VOL. IV. X 



