Wings of Xyelidae from Goulet and Huber (1993, fig. 321) [1].

References

1. Goulet H., Huber J.T.
   (1993) Hymenoptera of the world: an identification guide to families. Research Branch, Agriculture Canada.

Antena of Xyela redrawn from Gauld and Bolton (1988, fig. 41)[1].

References

1. Gauld I., Bolton B.
   (1988) The Hymenoptera. Oxford University Press, Oxford.

Wings of Macroxyela. From Comstock (fig. 424) [1].

References

1. Comstock J.H.
   (1918) The wings of insects. The Comstock Publishing Company, Ithaca, N.Y.