434 GNATS OR MOSQUITOES — CHAPTER XIII 



h. With the pale bands of the hinder segments expanded in tlie ? only. 



90. C. nigri^ies, Zetterstedt. Tarsi without distinct ornament. 



tliorax black. Venter black, with an indistinct paler median 

 line. 



<•. With the pale bands of the last two liind segments laterally expanded 

 in the $ only. 



91. C. sagax, Skuse. Abdominal pale bands sinuous, and ochreous 



in the $ . Thorax without defined ornament. Pleurag 

 spotted. 



d. With fairly broad, simple basal abdominal pale bands. 



92. C. virldivcntcr, Sp. n. Thorax without obvious adornment. 



Scales of venter colourless. Abdominal pale bands, with a 

 deltoid median expansion. 



93. C. consohrinus, Desv. Thorax with an ill-contrasted median 



stripe of darker scales. Abdominal pale bands dull white, 

 with some white scales on the sides of the dark part of the 

 segments. 



94. C. sylvcB, Theob. Thorax reddish-brown in the middle, pale at 



the sides. Tarsi black. Venter white. Wings with 4 close 

 up to 3. 



95. C. pervigilans, Bergroth. Thorax without defined ornament. 



Venter white, with median black spots. 



96. C. pusillus, Macquart. Thorax brown, with whitish lines. 



Tarsi pale yellow. Wings with 4 very close to 3. 



97. C. iiavipes, Macq. Thorax rufous, with a pair of submedian 



dusky lines. Venter pale yellow. Tarsi dark. 



98. C. ornatus, Hoffmanseg. Thorax whitish, with two black streaks. 



Tarsi nearly black. 



99. C lufcolateralis, Theob. Thorax purple-black, with broad 



lateral yellow hnes. Tarsi yellowish-brown. Venter dusky. 



100. C. pulchriv enter, Giles. Thorax golden-scaled, with fine median, 



and broader lateral black lines. Tarsi black. Venter elabor- 

 ately adorned with white, yellow and black. 



101. C Beesii, Theob. Thorax with a broad dark median line, 



separating two pale golden stripes. Tarsi dark bro^vn. 

 Venter yellow, with two black patches on the first segment. 

 c. With the pale basal abdominal bands narrow. 



102. C. linealis, Skuse. Pale abdominal bands ochreous. Thorax 



brown, with four parallel golden lines. Tarsi violet-black- 

 Ventral segments ochreous, with narrow black apical bands. 



103. C. Zomboensis, Theob. Pale abdominal bands grey. Thorax 



golden-brown, with two well separated dark longitudinal lines. 

 Tarsi brown. Venter with many white scales. 



104. C. intpudicus, Ficalbi. Abdominal bands white. Thorax dark 



grey, with two \ellow lines behind. Tarsi nearly black. 

 Venter whitisli, with black lateral spots near the bases of the 

 segments. 



