﻿AFEICAN CULICIDAE, OTHER THAN ANOPHELES. 



5 



5. Eighth segment of female abdomen slender, retractile ; male re- 

 sembling a Stegomyia ... ... ... ,,.HoWARDlNA, p. 12. 



Eighth segment of female abdomen broad, truncate (except in 



Mimomyia), not retractile* ... ... ... ... ... ... 6. 



A B CD 



Fig. 1. — Terminal segments of female abdomen (dorsal view) : — A, Culex tigripes Tar. fuscus, 

 a specimen with distended abdomen ; B, Culex tigripes, abdomen not distended ; 

 C, Mimomyia hispida ; D, Ochlerotatus cumminsi. 



6. Head without any flat scales in the middle above ; proboscis never 



swollen at tip ... ... .. ... ... ... ... 7. 



Head with at least a row of flat scales round the eye-margins, 

 usually almost entirely clothed with flat scales ; proboscis often 

 swollen at tip ... ... ... ... ... ... ... 13. 



7. Wing-scales very broad and dense ... ... ... ... ... 8. 



Wing-scales not very broad (in African species — but cf. 



Culex age?*) ... ... ... ... ... ... ... ... 9. 



8. Male palpi as long as proboscis, thin, last joint very short 



Mansonioides, p. 24. 

 Palpi similar in both sexes, very short ; middle femora with a tuft 



of scales at the tip ... ... ... ... ... Aedomyia, p. 24. 



9. Fork-cells very short ; wings nearly bare ; male palpi two-jointed 



Mimomyia, p. 35. 

 Fork-cells not very short ; male palpi three-jointed ... ... 10. 



10. Metatarsus of hind legs distinctly shorter than the tibia ; male 



palpi long, the last two joints swollen ... ... ... ... 11. 



Metatarsus of hind legs at least as long as the tibial (usually 



longer); male palpi thin (long or rather long) ... ... ... 12. 



11. Penultimate joint of male palpi thicker and somewhat longer than 



terminal one ; usually yellow species ... Taeniorhynchus, p. 25. 

 Penultimate joint of male palpi thinner but not longer than 

 terminal one ; not yellow species ; cross-veins almost in a line 



Theobaldia, p. 27. 



12. Male palpi longer than proboscis, last two joints curved upwards 



Culex, p. 27. 

 Male palpi shorter than proboscis, straight... Protomelanoconion, p. 33. 



# Taeniorhynchus has this segment rather small and narrow, but not at all retractile ; while 

 Mansonioides exhibits a very peculiar structure of the female abdomen : the eighth segment is 

 permanently retracted within the seventh, which is very short, being not longer than the eighth 

 segment of Culex ; there are two very large and broad cerci, which, however, are not prominent 

 like those of Ochlerotatus. 



f Culex argenteopunctatus is an exception to this, as it has the hind tibia slightly longer than 

 the metatarsus. 



