372 POSSIBLE STRIDULATTNG ORGAN IN THE MOSQUITO. 



EXPLANATION OF PLATE. 



Fig. 1. Eight half of thorax of Anopheles macuh'pennis, Meig, with base of right wing and right halter. 

 Magnified about 90-100. 



Fig. 2. The same magnified about 15 to show the area which bears the stridulator. This«as coloured 

 blue. 



A. Toothed bar. 



A 1 . The teeth which rasp on the ridges borne by B. 



B. Blade bearing the ridges R. 



C. Trough which limits the movements of B. 



D. Distal chitinous sclerite bearing a claw which works in. 

 D 1 . The hollow at the base of B. 



E. Intermediate sclerite between D and F. 

 E 1 . Hinge between E and F. 



F. Proximal sclerite which is inserted into the thorax beneath the scut9llurn 

 F 1 . Process on F. 



G. Thickened edge of squama. 



G 1 . Fold of squama overhanging E and D. 



H. Process of chitin which overhangs the base of the blade. 



K. Distal end of halter. 



L. Concave area covered with papillae. 



M. Knob. 



M 1 . Hinge. 



N. Papillae on knob. 







