Bioacoustics of Dictyomorpha

Redescription Body relatively small. General colour ochraceous in dead specimens (probably viridescent or stramineous green in life). BL , ♂ 16.9 mm , ♀ 18.6 mm ; HL, ♂ 5.4 mm , ♀ 5.7 mm ; HW , ♂ 1.1 mm , ♀ 1.2 mm ; TL, ♂ 10.5 mm , ♀ 12.3 mm . Cephalic process ( Fig. 10A–C ) 1.9 times as long as pronotum and mesonotum combined. Vertex ( Fig. 10A ) with median carina distinct only at extreme apical part and basal one-fifth, rest of carina indistinct and sometimes slightly sutured. Frons ( Fig. 10C ) with intermediate carinae strongly elevated and blade-like, converging at eye level; median carina complete. Tegmina elongate and slender, nearly 3.5 times as long as broad; costal cell with between six and eight suboblique veins. Male genitalia with pygofer relatively large and broad, with ratio of ventral to dorsal width ∼1.4: 1.0, in lateral view posterior margin distinctly produced posteriorly near middle, with posteriorly produced part obtuse apically ( Fig. 10E ); in dorsal view dorsal margin excavated to accommodate segment X, dorsolateral margins strongly produced posteriorly ( Fig. 10F ). Gonostyles symmetrical; base narrow, expanded towards middle, then gradually narrowed towards apex; apex bluntly rounded; upper process large and blunt, directed dorsally ( Fig. 10E ). Aedeagus ( Fig. 10G–I ) with endosomal processes extended from phallotheca: in lateral view apical half membranous and inflated, turned dorsoposteriorly; relatively short, small, and slender, apex acute; phallobase relatively narrow and elongate, phallobase with two membranous lobes ventrally. Segment X in dorsal view with ratio of length to width in middle ∼2.1: 1.0 ( Fig. 10F ). Type material examined Paratype ♀ , [ Philippines ]: Mt. Banahao , Luzon , IV.1923 , Dictyomorpha hectica Hpt. [Haupt’s handwriting], Paratypoid [red label] , ♀ , Dictyomorpha hectica Haupt, 1926 , des. R. Remane 2003 (SNSD). Other material examined [ Philippines ]: 1♂ , Mt. Banahao, P.I., Baker; Dictyomorpha elongata Mel. [Melichar’s handwriting], det. Melichar; Cotypus [red label]; Collection Dr. Melichar; Dictyomorpha elongata Melichar, 1903 , ♂ , Melichar det. 1912 [Lauterer’s handwriting] (MMBC); 1 nymph, Los Banos, P.I., IX.1915 (BPBM). Distribution Philippines (Luzon, Los Banos). Remarks Liang & Song (2012) did not examine the type and other adult material of D. hectica except for a nymph from Los Banos, Luzon, Philippines , which is adjacent to the type locality. One male specimen from Mt. Banahao, Philippines , deposited in MMBC was determined as D. elongata by Melichar and designated as a co-type of D. elongata by Lauterer. In fact, Mt. Banahao was not recorded in Melichar’s dictyopharid monograph ( Melichar, 1912: 104 ); hence, the designation for D. elongata is rejected here. We redescribe this species and add the description of male genitalia for the first time.

Diagnosis The genus may be distinguished by the following combination of characters: cephalic process distinctly compressed dorsoventrally, flat and narrowing from base to apex; frons with intermediate carinae strongly elevated, median carina complete, strongly elevated at apex, and slightly keeled in middle; tegmina distinctly elongate, without dendroid secondary veins; Cu branched before Sc+R and M; costal cell with suboblique veins on apical one-third; male pygofer with an obtuse posterior process; and aedeagus with a pair of elongate, large, strongly inflated, and membranous endosomal processes. Diversity and distribution Dictyomorpha includes seven species and exhibits an Austro-Oriental distribution. Remarks This genus was recently revised by Liang & Song (2012) . Six species, except for Dictyomorpha hectica Haupt, 1926 , were described and illustrated, along with fifthinstar nymph and wax glands of parts of Dictyomorpha species.