While I was at it I took a few other pics of our assorted jonquils:
Earlier in the day I had given Mother's yard the once over. As we were talking in the yard Mother asked if knew what all those bugs were.
Sure enough, closer inspection of black clumps on the side of her house revealed big clusters of insects with the telltale x on their backs: true bugs, order Hemiptera.
I guessed milkweed bug.
I took lots of shots. Home again I checked Bug Guide. It looks like Eastern Boxelder Bug (Leptocoris trivittatus).