Mr. Ashmead has written thus of the Xyelidæ: “ the imagoes appear very early in the year, or in February, March and April, Deposit their eggs and then disappear, the consequence being that very few are taken, and only a few of the common forms are known.” Of the genus Xyela, as now restricted only one North American species, X. minor, Norton, has been described.

On May 1st of the present year, as we were going up to our classes in the Normal University at Las Vegas, N.M., my wife picked a small insect off my coat. It was at once transfered to the bottle which is never absent from the entomologist's person, and upon inspection later, proved to be a new species of Xyela, herewith described: