EXPLANATION OF PI. ATE IX. 



The figures show from left to right the upright forked scales 

 of the head, the hairs or scales on the dorsum of the thorax, 

 and the hairs or scales on the prothoracic lobes. The drawings of 

 these structures relate respectively to 



The genus Neostethopheles (Fig. i.) 



,, ,, Myzomyia (Fig. 2.) 



,, ,, Patagiamyia (Fig. 3.) 



,. Pyretophorus (Fig. 4.) 



In Fig. 2 the three thoracic scales shown are false scales ; in 

 Fig. 3 one scale is a false scale and two are true scales ; in Fig. 4 

 all are true scales. 



