THE NATURAL HISTORY OF BOMBAY MALARIA. 401 



make use of a small magnifying glass and to note the following- 

 points : — 



Examine the palpi and note that they are covered with 

 black scales except at three points, the tip, at which there 

 is a broad band of white, and two other areas which show very 

 narrow white bands. (N. stephensi has two broad white 

 bands, one narrow one and a few scattered white scales on 

 each palpi.) 



Examine the legs and note that they are a uniform dark 

 brown colour except at the joints where the}r are clearly 

 banded with white. (JSf. stephensi has fine white speckles all 

 over its legs). 



N. stepjiensi. 



The adults of this species resemble M. rossi very closely at first 

 sight, and the males are not easy to distinguish except by the 

 speckling of the legs. They are slightly greyer in colour than 

 M. rossi. The female mosquito can be readily identified by the 

 following points : — 



Examine the palpi and note that they possess two broad 

 white bands, one at the tip and another close to it. A third 

 very narrow white band is present a little lower down, and 

 there are often a few irregularly scattered white scales among 

 the black scales of the palpi. Examine the legs and note that 

 they are thickly speckled with white scales which give them 

 a greyish appearance to the naked eye. 



M. barbirostris . 



This mosquito is quite unmistakable, as it is almost always a deep 

 black in colour, and suggests at once a mosquito in mourning. 

 There are a few whitish scales on the wings, but they are 

 hardly noticeable except to close examination. The palpi and 

 proboscis are very long and densely scaled, often appearing nearly 

 as long and thick as the abdomen of the insect. 



Examine the palpi and note the thick black scales and the 

 absence of white bands. Sometimes there are a few white 

 scales at the very tip but quite often they are absent. 



