78 TRIBE ANOPHELINAE [CH. 



structure are insufficient upon which to found genera. In this 

 case the Anophelinae are considered as represented by a single 

 genus (Anopheles Meigen, type species A. maculipennis Meigen) 

 containing some hundred or more species. 



These conflicting views regarding nomenclature make it 

 very difficult at present to treat of the systematic arrangement 

 of this sub-family. The most that can be done is to give some 

 classified tabulation of the species based on their more con- 

 spicuous characters, and to indicate as far as possible groups 

 of species corresponding to a particular scale structure and 

 hitherto given generic rank. In this respect use has been made 

 of the general scheme of the natural affinities of the Anophe- 

 linae given by Christophers. In this scheme the Anophelinae 

 are subdivided into three main natural divisions, the relation 

 of these divisions to the genera already mentioned being as 

 follows : 



A. Protoanopheles. 

 Stethomyia. 



Anopheles, Patagiamyia and Lophoscelomyia. 



Myzorhynchus, Cycloleppteron, Arribalzagia and Notonotncha (Coquillet). 



B. Deuteroanopheles. 

 Myzomyia and Pyretophorus. 

 Pseudomyzomyia. 

 Nyssorhynchus, Neocellia and Cellia. 



C. Neoanopheles. 

 Neomyzomyia, etc. 



In the following table the known species of Anophelinae 

 are arranged in the form of a synoptic table. In this table 

 12 groups more or less readily differentiated both by general 

 characters and by scale structure are given. The species which 

 compose these groups often so closely resemble one another that 

 they differ only in a few minute details, a generalized descrip- 

 tion serving for the chief characters of all the species in the 

 group. The chief characters of any species, therefore, to a 

 large extent can be gleaned from the table, but for a full 

 description of each species the present space is inadequate, 

 and systematic works on the Culicidae must be consulted. 



A second table is given shewing all described species of 

 Anopheles, with their synonymy if necessary, and their relation 

 as far as is known to the transmission of malaria. 



