Fig. 1

Side view of sharpshooter head. (a) Overview of structures described in text to show their sizes and relative positions in the functional foregut. Small box near the cibarium (cib) is enlarged in the inset. *, location of the true mouth; vm, precibarial valve muscle; large black dot, cross section of the supporting cuticular bridge (tentorium). (b) The fluid-conducting channel formed by the convergence of the stylet food canal, precibarium, and opening to the cibarium. d-s, neuron cell bodies and nerve (short line) from the distal chemosensilla; p-s, cell bodies and nerve from the proximal chemosensilla (drawing by E. Backus).