Bioacoustics of Gryllacrididae

1 Males apterous (except Camposgryllacris ). Spurs on T1 and T2 with variable formula. T3 uniformly yellow ochre........ 2 - Males with rudiments wings presents laterally on meso- and metanotum. T1 and T2 with 5/4 spurs formula. Base of T3 darkened......................................................................... Camptonotus americanus 2 Stridulatory apparatus present. Ninth tergite of male dorsally divided in the middle by a thinner or smooth area, with processes on posterior margin. Male subgenital plate subquadrate or subrectangular, apex slightly to distinctly notched medially..... 3 - Stridulatory apparatus absent. Ninth tergite moderately inflated, with a median longitudinal carina on the distal half, posterior margin rounded. Male subgenital plate short, apex emarginate with an obtuse angle.................... Camposgryllacris 3 Face without dark brown markings. T1 and T2 with 5 pairs of spurs. Stridulatory apparatus with one row on tergite II and two rows on tergite III. Posterior margin of ninth tergite with two scapula-shaped or rectangular processes, bearing one or two apical spine-shaped. Last tergite with a bifid process on the anterior margin between the processes of ninth segment. Female subgenital plate triangular, apex rounded or bifid................................................ Fiancogryllacris - Dark brown marking below compound eyes and behind scape. T1 with 5/5 spurs formula and T2 with 4/5. Stridulatory apparatus with two rows on tergites II and III, first shorter. Posterior margin of ninth tergite with a small median process, laterally more developed as lobule, apex bearing a short spine-shaped curved downward. Anterior margin of tenth tergite with a plate-shaped process, more compressed at the center. Female subgenital plate semicircular, anterior margin rounded........ Diplospinula

Diagnosis: Size small to large ( 5–50 mm . aprox.). Slender or stout body ( Figs. 3 and 4 ); antennae significanly longer than body length; antennal space 1.5 to three times as wide as the antennal scape; eyes ovoid, ocelli with diverse degrees of development, lateral ocelli usually present; central ocellum can be present or not; if present, of varying degrees of development and color ( Figs. 5 and 6 ). Wing development variable (wingless, subapterous, brachypterous and macropterous) ( Figs. 3 and 4 ). If wings are present, tegmina and hind wings membranous (tegminal stridulation absent, femoro-abdominal stridulation does occur in some species) ( Fig. 7 ); tarsi of all legs soft and depressed ( Figs. 8–10 ), mid and fore tibiae with spines, varying in size from little developed to prominent, fore tibiae hearing organs absent ( Figs. 11 and 12 ). Male terminalia with several structural variations, in the tenth tergite, epiproctus, cerci and subgenital plate ( Figs. 16–19 ). Ovipositor elongated and with varying degrees of curvature. Taxa included: Subfamilies Hyperbaeninae n. subf. and Gryllacridinae n. sensu .