Bioacoustics of Australiagraecia

Diagnosis. Head globular to slighting slanting; fastigium of vertex short but with minute median sulcus. Pronotum rather short, not covering most of male tegmina, cephalic and caudal margins about equal; lateral lobes relatively deep, the cephalic portion produced and covering half of the very large thoracic auditory spiracle. Tegmina of male macropterous, absent in females. Thorax with a pair of thick, widely-spaced spiniform processes; mesothorax bearing a prominent pair of almost erect tubular processes; metathorax with a similar but slightly larger pair of processes. Male abdomen not modified; tenth tergite with soft, shallow median incision; paraprocts short triangular projections seemingly not used in a clasping role; cerci highly species’ distinctive, ranging from incurved spiniform and needle-like to more traditional clasping organs; phallic complex almost entirely membranous, but with a pair of lightly sclerotised rods on each side; subgenital plate about as broad as long or longer than broad, apex with a shallow V-shaped incision, styles well indicated, about as long as each side of median incision, sparsely setose. Females apterous, abdomen elongate; tenth tergite short apically truncate; lateral portion of base of ovipositor with a “plate” on each side; subgenital plate varying in length and width with the species, apex narrowed and with a shallow notch. Ovipositor very elongate and gracefully upcurved, unarmed, much longer than length of body. Colour almost uniform among the species, yellow brown with dark brown median stripe running from head to apex of tenth tergite, including the tegmen in males ( Figs 2A , 4A ). Tip of male abdomen often bright orange in life, this fading on museum specimens. In addition, almost all species are identical except of characteristics of the stridulatory file and male and female genitalia.