Cla isijicu tion of the Gw\\c\\\x. 24.} 



I No scales on the abilomeii (\ery rarely there may 

 be a few scattered and iucouspicuuus scaled on 



I the fjeuital lobes) = Anopheleg. 



i.\ Abdominal scales present, usually as a small out- 

 standing tuft on the ventral surface of the pen- 

 ultimate segment, rarely as a uniform covering 



to the terminal segment = Myzorhynchus. 



1 The predominant scales of the head are of the 



^ J " upright forked" kind (cuneiform) = Nyssorhynchus. 



" j The predominant scales of the head are not 



( " upright forked " = Chagasia. 



Tlie species of Mi/:)mia may be arranged in two iuter- 

 j^raduating series as follows : — 



a. The covering of the scutum consists mainly of 



hairs = Myzoinyia. 



b. The covering of the scutum consists mainly of 



falculate scales = "Pyretophorus." 



Tlie species of Nyssorh;jnchus may be arranged in three 

 fairly distinct series as follows : — 



a. Abdominal scales present on a few of the distal 



segments = Nyssorhynchus. 



b. Abdominal scales scattered on all the segments. . = " Neocellia.'' 



c. Abdominal scales fairly abundant on all the seg- 



ments, and also in outstanding tufts which may 



be either lateral or ventral = "Cellia." 



The following are not included in the foregoing synopsis 

 or in the sequel : — 



1. Aldrichia error, Theobald. — One specimen, from India, 

 in the British ]\Iuseum. As it stands it consists of the head, 

 tiiorax, wings, and appendages of a Myzomyia rossii^ Giles, 

 to which the scaly dark-coloured abdomen of some other 

 species of mosquito has been attached. 



2. Bironella gracilis, Theobald. — Described from three 

 males. 



The subgenus Anopheles shades into Myzorhynchus through 

 Anopheles sep(iratus,Lt<^.\c^%ie.r, Anopheles vestitipennisj Dyar 

 and Knab, and Anopheles grabhaniii, Theobald ; it also 

 shades into Myzomyia through Anopheles gigas, Giles, and 

 Anopheles wellcomei, Theobald, and })crhaps into Pyreto- 

 phorus through Anopheles atratus, Skuse. 



The subgenus Christya is essentially similar to Myzo- 

 rhynchus. 



16* 



