Smithsonian Report, 1921. — Melander. 



Plate 4. 



A. Field of Basket Grass (Xero- 

 phyllum texax). the large 

 Fly Pocota Hovers Over the 

 Flowers. 





B. Fire Weed (Epilobium angusti- 

 folium) in the old burn near 

 Narada Falls. 



C. A Close-up View of Avalanche Lily and Paint Brush. Notice the 

 Fly Sericomyia Visiting the Lily. 



422 — 4 



