Page:Tropical Diseases.djvu/182

brackish or salt water, and each species has its own particular kind of habitat.

For those who still think it desirable to sub-divide the genus Anopheles, the following synopsis of subgenera may be serviceable:—

SYNOPSIS OF THE SUBGENERA OF ANOPHELES

Front edge of wing either not spotted or having not more than two distinct spots.	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right.}$	Abdomen without scales; palpi slender; wings not or little spotted; wing scales narrow			Anopheles.
		Abdomen with some localized scales, if only a tnft on the 7th abdominal sternum; palpi shaggy; wings always dappled; wing-scales broad			Myzorhynchus.
Front edge of wing broken into numerous alternate light and dark spots or streaks.	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	Mesothorax invested with hairs			Myzomyia.
		Mesothorax invested with narrow upstanding scales			Pyretophorus.
		Mesothorax invested with broad, appressed, white or yellow scales	$\scriptstyle {\left\{{\begin{matrix}\ \\\ \end{matrix}}\right.}$	No outstanding tufts of scales on abdomen	Nyssorhynchus.
				Tufts of scales projecting from abdomen laterally or ventrally	"Cellia."