i68 AGRICULTURAL EXPERIMENT STATION. 



ever conditions favor and almost any body of water, large or 

 small, clean or moderately foul, will serve to breed the pests. 

 Nevertheless, on the whole it breeds most abundantly in clean 

 water along the edges of ponds or swamp areas or in the eddies 

 of shallow streams. 



ANOPHELES MACUEIPENNIS. 



The Four-spotted Anopheles. 



This is similar to A. punetipeiinis, but much lighter brown in 

 color, and consequently the thoracic stripe, which is also more yel- 

 low, does not stand out so clear in contrast. The wing veins 

 are clothed with brown scales, some of which gather into four 

 very distinct patches a character which distinguishes it from all 

 other species at a g'lance. 



Figure 47. 



Wing of A. maculipcnnis : enlarged. (Original.) 



Description of the Adult. 



This species, as in pimctipennis, varies in size, but usually 

 measures 5 to 6 mm. ,=.20 to .24 of an inch in length, 

 excluding the beak, which is about half the length of 

 the body. The head is dark brown, with a patch of 

 yellowish white scales in the center of the occiput, near the an- 

 gle of the eyes, divided in the center by a line of brown scales; a 

 tuft of yellowish hair projects forward over the head from be- 

 tween the eyes, and there is a faint border of the same color to 

 their posterior margin. The proboscis is light brown ; the palpi 

 in both sexes are the same in shape as those of punctipennis, but 

 light brown, paler toward their apices, and with the long hairs of 

 the male yellowish. The antennre are brown, the plumes of the 

 n'?ale grayish brown. 



The sides of the dorsum of the thorax are velvety brown, the 

 intermediate area with three rows of yellowish hairs, the rows 

 more or less divided by the brown ground color of the thorax. 



