Fore wing of Hartigia nigra (earlier Macrocephus satyrus) (a), Janus femoratus (earlier J. cynosbati) (b), J. abbreviatus (c), Orussus abietinus (d), Pelopoeus cementarius (e), Apis mellifera (f).
From Comstock (fig. 397) The wings of insects,
, Ithaca, N.Y., (1918)
[1].