Cadre

In the not-too-distant future, two men crash their ultralight flyer during a severe storm. They soon encounter Cavendish, an interpreter for the government. Cavendish tells them that they have crash-landed in the middle of a government reserve, and that they will be detained if they are caught.
Cavendish is injured, but his wound is peculiar. The two men, Wes Madson and Clark Tuttle, decide to give the wounded man help, and agree to move him in the hopes of finding someone with medical experience.
The wounded man tells his rescuers the story of the military's development of large grasshoppers, or locusts, which would devour the crops and food sources of the enemy. The creatures were large - up to one meter high and two meters long - and didn't stop at eating test vegetation. These creatures also devoured humans. This development didn't stop the military's research into developing the Carapachi - grasshopper soldiers.
The two men discover that Cavendish was also a product of the military's experiment. He was created as a member of the "Cadre de Carapachi", intended to be a liaison between humans and the Carapachi.
The two men discover that the Cadre may be much more human than they realize, in this science fiction novella by T. Whitman Bilderback, "Cadre".