Big-Eyed Bugs Of The Malagasy Region (Hemiptera: Heteroptera: Lygaeoidea: Geocoridae) Author Tang, Jin Author Zhang, Gongaote Author Guo, Junqi Author Luo, Lingxuan Author Jiang, Jiamei Author Pan, Hongbo text Acta Zoologica Academiae Scientiarum Hungaricae 2023 2023-08-25 69 3 247 264 http://dx.doi.org/10.3389/fmicb.2023.1259653 journal article 10.17109/AZH.69.3.247.2023http://zoobank.org/D76B85CE-96F8-40D4-BB4F-DC2856887319 2064-2474 10272316 Hypogeocoris violaceus ( Signoret, 1881 ) ( Fig. 20 ) Material studied: m, MNHN: “Maroantsetra / Ambodivoangy // INSTITUT / SCIEN- TIFIQUE / MADAGASCAR ”. Diagnosis. Colouration mostly dark brown or black. Clypeus, surroundings of antenniferous tubercles, antennomeres, prothoracic, and legs collar infuscate ochraceous. Margin of exocorium narrowly semi-hyaline ochraceous. Integument of dorsum shiny with dense, fine pubescence. Punctuation of pronotum and scutellum fine and dense. Only submacropterous morph of this species is known; hemelytron with claval fold of hemelytron developed, clavus and corium distinct; membrane reaching genital plate, but not surpassing it. Peritreme vesiculiform auricle with dorsal margin of terminal lobe slightly indented. Distribution. The species is known to be endemic to Madagascar ( Slater, 1964 ; present study). Remarks. The species greatly resembles H . alluaudi in general facies and colouration. Especially, because the extent of ochraceous of decoration of H . violaceus is variable. However, there are three characters which provide secure basis for separation of the two species: integument of vertex and thoracic dorsum with fine, dense pubescence in H. violaceus (pubescence missing in H . alluaudi ); pronotum with fine, dense punctuation in H. violaceus (punctuation of pronotum is rather coarse and sparse in H . alluaudi ); terminal lobe of peritreme indented dorsally in H . violaceus (terminal lobe indented anteriad in H . alluaudi ).