This is Fig. 25 from Cole (1919), bibliographic details here.

It dipicts an individual of the western North American species Turbopsebius diligens. This species is characterized by wing venation where either:

A) the terminal end of the anal vein (A1) meets the cubital vein (Cu) above it before reaching the wing margin...resulting in a "closed" anal cell (cup); or

B) the terminal end of the anal vein (A1) fades before meeting the cubital vein or the wing margin...resulting in a narrow opening at the end of the anal cell (cup);

The figure above illustrates the second case "B". Case "A" is shown in the 1st image of this series.

The labels in the figure are as follows:

  A1 = anal vein;
  Cu = cubital vein;
  cup = anal cell