Bioacoustics of Eusynnada

Prothorax strongly rounded laterally, with basal and weak apical constrictions. Scutellum tongue-shaped. Elytra weakly rounded laterally, separately rounded at apices; ultimate and penultimate striae very close to each other beyond metepisternum. Pygidium broadly exposed when in repose in male. Legs with front femora abruptly swollen around middle, much wider than middle and hind femora, each armed with triangular tooth, provided with erect setae along external margin, middle and hind femora similar to each other, provided with few erect setae along external margin of tooth; front tibiae curved, provided with erect setae along inner margin on basal half, dilated internally near apex, middle and hind tibiae weakly sinuate internally, similar to each other except uncus much reduced in size in hind pair; tarsi robust, claws moderately divergent, each with triangular basal process. Venter with metasternum weakly depressed in middle in male; posterior margin of second ventrite more broadly curved posteriorly at sides than third and fourth ventrites; first ventrite behind coxae and second to fourth ventrites each subequal in length. Fifth ventrite much shorter than length third and fourth ventrites combined. Tergum of abdomen with pair of scrapers for stridulation on anterior margin of seventh tergite. Terminalia as illustrated ( Figs. 18–30 ); aedeagal apodemes shorter than body, tegmen open dorsally; sternite 8 paired and narrow, spiculum gastrale symmetrical, shorter than aedeagal body; hemisternites of ovipositor with short styli, slightly longer than broad; spermatheca comma-shaped, duct and gland close to each other and invaginated into collum at bases; sternite 8 with apodeme slender.