Ground beetle.

Longhorned beetle.

Stink bug.

Cockroach.

Praying mantid.

19. All legs slender, similar in form; body flattened from above:

Family Blattidae (roaches) (figure 21 ).

Either the front legs or the hind legs greatly modified and very different in form from the others . . 20.

20. Front legs greatly enlarged and spined, fitted for seizing and holding prey; prothorax slender, in form of a long neck; head broad and capable of unusually free movement :

Family Mantidae (mantids) (figure 22).

Grasshopper.

Katydid.

Cricket.

Front legs normal; hind legs fitted for jumping, the femora much enlarged........................... 21.

21. Antennae short, much shorter than body:

Family Acrididae (grasshoppers) (figure 23).

Antennae longer than the body................................................................................................. 22.

22. Tarsi four-segmented Family Locustidae (long horned grasshoppers, katydids, etc.) (figure 24).

Tarsi three-segmented: Family Gryllidae (crickets) (figure 25).

23. Wings covered with minute over-lapping scales, often in beautiful color patterns : Order Lepidoptera (moths and butterflies).......................................................................................... 24.

Wings not covered with scales . ............................................................................................... 26.