Taeniorhyncbur, etc., and observe that to the naked 

 eye they are very similar. 



1. Note that the nymphae of Anophelines lie 

 less vertically in the water than those of Culex. 



2. Observe that the nymphs of Anofhelines are 

 more elongated antero-posteriorly and compressed 

 laterally than those of Culex and Taeniorhynchus. 



Fig. 31. Nymphal Syphon Tubes 



3. Observe the very large nymphs of some 

 common species of Taeniorhync bus and the great length 

 of air syphons which are directed straight forwards in a 

 very characteristic manner. 



