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structure of the sipho, and many details with regard to the anatomy 
and biology of the larva are unknown. It may be added, that no 
larva is known from the old world. We know, however, a pupa of 
Mansonia uniformis Theobald (figured by Theobald vol. III 1903 
p. 270). Its home is Central-Africa. It is characteristic on account 
of its fvery peculiar long curved siphos ending acuminately", a 
feature which is characteristic just in the American Mansonia-pupæ. 
We may suppose, therefore, that the same peculiar structure 
of the siphos will be found in the pupa of the European species. 
Head and mouthparts. 
Figs. 9 and 10. Dorsal and ventral view of head of a fullgrown larva., 
