Fig. 19. Supraorbital bristle. Note the stiff naked projection of the 

 shaft, the rather rudimentary barbs, and the aftershaft. X 17. 



Fig. 20. Eyelash. Note the rudimentary barbs representing the after- 

 shaft. X 24. 



Fig. 21. Portion of barb from lesser wing covert, showing transition 

 from downy filamentous barbules to differentiated proximal and distal 

 barbules. X 34. 



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