﻿28 F. W. EDWARDS A SYNOPSIS OF THE SPECIES OF 



2. Thorax with pale scales on the anterior two-thirds, or at least with 



a transverse pale band behind the middle... ... ... ... 3. 



Thorax almost uniformly coloured, at most with a pair of pale 



spots ; abdominal segments with complete basal white bands ... G. 



3. Wing-scales all, or nearly all, dark ; abdomen usually almost 



unicolorous ... ... ... ... ... ... ... ... 4. 



Wings with numerous light scales ; abdomen with conspicuous 



markings ... ... ... ... ... ... ... ... 5. 



4. Femora and tibiae with rows of sharply defined white spots 1. quasigelidus. 

 Femora and tibiae marbled but not spotted ... ... 2. consimilis. 



5. Abdominal segments with complete apical yellowish bands ; wing- 



scales equally light and dark ... ... ... ... 3. ager. 



Abdominal segments with both median basal and lateral apical 

 triangular pale spots ; on the wings the dark scales pre- 

 ponderate ... ... ... ... ... ... 4. annulioris. 



6. Lateral dark lines on thoracic integument outwardly concave 5. zeltneri. 



convex ... 7. 



7. Middle tibiae with a whitish lateral stripe ; abdominal bands broadest 



in middle ; band of proboscis broad and ill-defined ... 6. duttoni. 

 Middle tibiae unstriped ; abdominal bands of equal breadth through- 

 out ; band of proboscis narrower and more clearly defined ... 8. 



8. Femora not marbled ... ... ... ... ... 7. thalassius. 



Femora marbled ... ... ... ... ... ... 8. somaliensis. 



9. Proboscis banded ... ... ... ... ... 9. ataeniatus. 



Proboscis unhanded (but compare C. tigripes and C. univittatus, both 



of which sometimes show traces of a median pale band on the 

 proboscis) ... ... ... ... ... ... ... ... 10. 



10. Thorax with four well-defined silvery spots ... 10. argenteopunctatus. 

 Thorax without silvery spots ... ... ... ... ... ... 11. 



11. Large species ; femora and tibiae spotted ... ... ... 11. tigripes. 



Medium-sized species ; legs not spotted (except sometimes in 



tipuliformis)... ... ... ... ... ... ... ... 12. 



12. Legs somewhat striped as in Ochlerotatus ochraceus (on the fore leg 



the pale stripe is more or less broken up into spots, recalling 



C. tigripes) ... ... ... ... ... ... 12. tipuliformis. 



Legs not so marked ... ... ... ... ... ... ... 13. 



13. Tibiae striped with whitish, much as in C. duttoni ; " seventh vein " 



more distinct than usual, and generally bearing a few scales 



13. univittatus. 

 Legs uniformly brownish or yellowish (except for pale knee-spots)... 14. 



14. General coloration tawny ; proboscis clear yellow ; legs tawny 



14. pygmaeus. 

 Proboscis and legs dark brown or blackish ... ... ... ... 15. 



15. Abdominal segments with pale markings basally ... ... ... 16. 



Abdominal segments with pale markings apically (sometimes hardly 



perceptible) ... ... ... ... ... ... ... ... 24. 



