74 



less disturbance is caused, and the more readily are 

 larvae removed. 



2. By Dipping. Choose any water with grassy 

 or weedy edges, e.g., the edges of rivers, streams, 

 ditches, lake margins, swamps, etc. 



With the least possible disturbance, dip out water 

 from the most sheltered positions, and as close to the 

 vegetation as possible, bringing up water and weeds in 

 the can. Allow the specimen of water to remain a few 

 seconds, and remove any larvae or nymphae as they 

 appear on the top with the spoon. 



Fig. 26. Larvae of an dnopbeline (left} and Culex (right) 



Anopbeline larvae should not be mistaken for any- 

 other mosquito larvae. 



I. When undisturbed they lie flat along the top 

 of the water, and on every segment certain hairs 

 (palmate hairs) actually indent the surface film. 

 Observe that when viewed in certain lights from one 

 side these indentations can be plainly seen. The 

 appearance may even be as though the dorsum of the 

 larvae projected from the water. This, however, 

 is not the case. 



