Flower Crab Spider with Deer Fly

This is a Flower Crab Spider with what appears to be some kind of Deer Fly. The Flower Crab Spider sits on white or yellow flowers (it is white on a white flower, but slowly turns more yellow on yellow flowers) and waits for other insects to visit. Then it pounces. Here it is on Yarrow. I very nearly walked right by this little drama along side the Kennebunk Bridle Path. In fact I am not sure what caught my eye. I took a few shots with the 75-300mm zoom and then switched to the Sony NEX 5T and ZEISS Touit 50mm f2.8 macro. The spider is less than 1/4 inch long.

ISO 100 @ 1/640th @ f9. Processed in Snapseed on my tablet.