CHIRONOMUS. 158 



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 h. Wings 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 gi"ey, 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 Avith 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. 

 AAA. 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-fiftli. Species 



118. 

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

 b. Thorax black. Species 119-125. 

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



VOL. IV. X 



