Bioacoustics of Letana infurcata

1990 . Letana infurcata Ingrisch, Ent. Scand . , 21 (3): 249. 2007. Letana infurcata, Chandra et. al., Zoos΄ Print Journal, 22 (5): 2684. Material examined : Chhattisgarh , Raipur , Barnawapara WLS; Bafra , 22.vii.2011 , 1( ♀ ,DC); Barnawapara camp, 01.viii.2011 , 1( ♂ ,NC). Koriya, Gurughasidas NP; Sonhut RH, 24.iv.2013 , 1( ♀ ,NC) coll. S. K. Gupta & party. Diagnostic characters : Body size rather small, green, tegmina rather broad and hind wings hardly protruding. Radial sector of tegmen unforked. Male : Stridulatory file short, almost straight to subarcuate, with comparatively large pegs, ninth tergite rather weakly projecting behind, apex broadly rounded, truncate, or even slightly concave. Supra-anal plate with concave lateral margins, surface shallowly depressed in the middle, apex very slightly convex to subtruncate. Cerci rather short, arcuate. Subgenital plate lateral lobes with apical part slender, apex rounded. Phallus sclerite small, hardly sclerotised, bulging, lamellate, teeth minute. Female: Supra-anal plate circa semicircular, with a shallow medial longitudinal groove or furrow in basal half. Cerci short, stout, apex subacute to obtuse. Subgenital plate circa pentagonal, with a baso-medial, longitudinal fold almost over the whole length. Distribution : India : Chhattisgarh (Koriya and Raipur), Madhya Pradesh , Pondicherry and Tamil Nadu .

Description. Male: A rather small, green, parapterous species, tegmina rather broad and hind wing hardly protruding; radial sector of tegmina unforked, but with an additional radial vein branching directly from radius; stridulatory field length 2.55mm and width 1.40mm ; hind wing 3.25mm longer than tegmina; stridulatory file small, anterior margins sub-straight, but posterior margins L-shaped at base with about 105 teeth; 9th tergite rather weakly projecting, apex broadly rounded, truncate or even slightly concave; supra-anal plate with concave lateral margins, surface shallowly depressed in the middle, apex very slightly convex to sub-truncate; subgenital plate lateral lobes with apical part slender, apex rounded; phallus sclerite small, hardly sclerotised, bulging with lamellate minute teeth.