70 



MORE MINOR HORRORS 



raised and lowered it seems probable that the 

 slightly movable rod would be drawn across 

 the ridged bar. 



Fig. 18. — b, Right half of thorax of Anopheles 

 maculipennis, Meig, with base of right wing and 

 right halter, magnified about 30. a, The same 

 magnified about 5, to show the area which bears 

 the stridulator. tb, The teeth which rasp on the 

 ridges borne by bl ; kn, papillae on knob ; h, distal 

 end of halter; act, chitinous thickenings. (From 

 Shipley and Wilson.) 



We have mentioned above that the mos- 

 quito's note increased in pitch as the wings 

 were shortened until a very short stump was 

 left. As long as these stumps were left a 

 note was heard, and these stumps would 

 undoubtedly include the apparatus just 



