Delacampius alboarcuatus, Stehlík & Jindra, 2008

Stehlík, Jaroslav L. & Jindra, Zdeněk, 2008, New taxa of the Largidae and Pyrrhocoridae (Hemiptera: Heteroptera) from the Oriental Region, Acta Entomologica Musei Nationalis Pragae 48 (2), pp. 611-648 : 613-614

Delacampius alboarcuatus sp. nov.

( Fig. 3 )

Type material. HOLOTYPE: J (brachypterous), INDONESIA: BALI: Badingkau , 300-500 m a.s.l., 10.-14.xi.1991, I. Löbl lgt. ( MHNG).

Description. Colouration ( Fig. 3 ). Blackish on head, entire antennomeres 1-3, slightly more than apical third of antennomere 4, pronotum except of lateral margins, scutellum, clavus, most of corium (except of costal and distal margin, and part of corium between corial cleft and cubital vein up to apex of scutellum), mesotergites, sternum (except of posterior pleural flange I), legs, and zygosterna. Labium brownish. Lateral margin of pronotum and posterior pleural flange I reddish, dorsal and ventral laterotergites in lateral half red, in median half darkened. Costal and distal margin of corium, hypocostal lamina, and part of corium between corial cleft and cubital vein (up to scutellar apex) whitish. Whitish colouration of costal margin continued arcuately on distal margin of corium.

Structure. Body larger. Antennomere 3 as thick as antennomere 2 apically and about as thick as antennomere 4. Callar lobe large and gibbous; pronotal lobe short and flat. Lateral margin between callar and pronotal lobe strongly concave. Corium reaching mesotergite V. Posterolateral angle of corium strongly rounded, arcuate; rudiment of membrane very small, situated on inner side of corium and not reaching posterior corial margin.

Pygophore. In lateral view, ventral part of ventral wall gibbous and delimited from dorsal part by a furrow; dorsal part also gibbous. Medially, ventral rim arcuately elevated and slightly deflected into genital chamber; submedially merging into elevated and incrassated lateral rim. Ventral rim infolding in place of rounded process on dorsal rim concave and steeply sloping into genital chamber. Apices of parameres erected sidewards, approaching each other and reaching upper margin of process on ventral rim.

Punctation. Pronotal lobe with coarse punctures (except of distal margin), scutellum with more pronounced punctation in basal half, and with rows of punctures along corial cleft; punctures on corium fading in black colouration.

Pilosity. Antennomeres 1-3 with coarse black hairs; rest of body with longer pale pubescence; pubescence on mesotergites and ventrites shorter and adpressed.

Measurements (all in mm). Male (holotype, brachypterous). Body length 6.97; head: width (including eyes) 1.39, interocular width 0.92, length 1.05; lengths of antennomeres: 1 – 1.20, 2 – 1.13, 3 – 0.68, 4 – 1.48; pronotum: length 1.40, width 2.21; scutellum: length 1.08, width 1.19; corium: length 2.70, width 1.32.

Differential diagnosis. Delacampius alboarcuatus sp. nov. differs from the related D. parvulus sp. nov. by its larger size, different colouration (especially the whitish arcuate stripe in the posterolateral angle of the corium, Fig. 1 ), and longer hemelytron that reaches mesotergite V and is arcuate apically; the hemelytron is shorter, only slightly surpassing mesotergite IV, and apically truncate in D. parvulus sp. nov. Corium in D. alboarcuatus sp. nov. is widely rounded posteriorly and possesses a rudiment of membrane (in D. parvulus sp. nov. posteriorly truncate, without any rudiment of membrane).

Etymology. The species epithet describes the characteristic whitish colouration on the costal and distal margins of the hemelytron; it is composed from the Latin adjectives albus (= white) and arcuatus (= forming an arch).

Distribution. Indonesia, Bali.

Note. The pygophores of all known species of Delacampius Distant, 1903 , are very similar and of limited value for species identification. The external female genitalia of the Largidae also have no value in taxonomy.

Figures

Figs. 1-6. 1-2 – Delacampius parvulus sp. nov. (holotype, J, 5.26 mm): 1 – habitus, 2 – pygophore, dorsal view; 3 – D. alboarcuatus sp. nov. (holotype, J, 6.97 mm); 4 – D. siberutensis sp. nov. (J, 7.50 mm); 5 – Iphita fasciata sp. nov. (holotype, ♀, 16.47 mm); 6 – I. fimbriata (Stål, 1863) (♀, 14.50 mm). Photo: L. Dembický (1, 3-6) and J. Kabíček (2).