On the surface of the water at the shore of a small lake. There wave very little insect presence else where where I was hiking, however here the sun had warmed the area enough that several insects had gathered presumably to sun themselves. This included a sarcophagid on the shore, water lily-associated delphacids both on the water's surface and a foot or two up the shore line, and a pair of Mesovelia. These minute insects were among the species present and were probably the more abundant of them.

My question is: Are these nymphs or brachypterous adults?