NOTES ON THE DIFFERENT GENERA 427 



species coming from India and another (maculipalpis, Giles) is apparently 

 common to India and Africa. 



The thorax is covered with narrow-curved and spindle-shaped scales, 

 abdomen with small, flat or narrow-curved dorsal scales, especially on the 

 apical segments or in patches ; the legs are always banded or spotted with 

 white, and the tarsi have as a rule one or more pure white segments. (This 

 banding and spotting is of no generic value, however.) 



The species show considerable seasonal variation. The type of the 

 genus is N. maculatus, Theobald. 



Genus 9. Cellia, Theobald. 



Mono. Culicid., iii., p. 14. 



Very marked Anophelines, with densely scaly abdomens, the scales 

 irregularly disposed on the dorsum and forming dense lateral tufts ; thorax 

 with flat spindle-shaped scales,; palpi densely scaled and also the wings. 



The type of the genus is the African C. pharoensis, Theob. It is repre- 

 sented in Asia by C. kochii, Donitz ; in West Indies and South America by 

 C. argyrotarsis, Desvoidy, and C. bigotii, Theob., in Africa by C. squamosa, 

 Theob., &c. 



C. argyrotarsis, Desvoidy, and C. alpibes, Theobald, are undoubtedly 

 malaria bearers, also C. pharoensis. 



Genus 10. Aldrichia, Theobald. 



Mono. Culicid., hi., p. 353, 1903. 



A single species only occurs, represented by one specimen in the British 

 Museum.- 1 The abdomen is completely covered with large, flat over-lapping 

 scales, as in Culex ; the thorax with very narrow-curved scales, almost hair- 

 like, and the prothoracic lobes with outstanding flat scales. The single 

 species, Aldrichia error, Theob., was taken in India and placed by Giles 

 amongst his types ! of rossii 



Sub-family Megarhinina. 

 Genus n. Megarhinus, Robineau-Desvoidy. 



All large brilliant mosquitoes with long palpi in both sexes and, as a 

 rule, with a caudal fan of scales ; the proboscis is long and bent. They 

 are all sylvan species, and are not so far recorded as biting man. 



Genus 12. Toxorhynchites, Theobald. 



Mono. Culicid., i., p. 244, 1901. 



Differs from the former genus in that the ? palpi are short. 

 The Elephant mosquito of India (Toxorhynchites immiseticors), Walker, 

 bites very severely. They are sylvan species. 



Sub-family Culicina. 

 Genus Mucidus, Theobald. 



Mono. Culicid., i., p. 268, 1901. 



This genus is so far confined to Australia, West, and Central Africa, 

 East Indies and Malay Peninsula. They are all large mosquitoes, easily 



1 Others have since occurred. 



