Besides these, there remain a number of groups most of which have in the past been included under the order Neuroptera, among which the Mayflies will be readily recognized by the lack of mouth parts and by the possession of two or three long tails; the dragon flies by the two pairs of large wings, enormous eyes, and minute bristle-like antennæ; the scorpion flies, by the possession of a rigid beak, with the mouth parts at its tip; the caddis flies, by their hairy wings and lack of jaws; the lace wings, by the exquisite regularity of the series of cross veins about the margin of their wings, etc.
Fig. 139.—May Fly. What order (see table)?
Fig. 140.—Silver Scale. (Order?)
Exercise in the Use of the Table or Key.—Write the name of the order after each of the following names of insects:—
Wasp (Fig. [122])
Weevil (Fig. [163])
Squash bug (Fig. 184)
Ant lion (Fig. [170])