A key to species of genus Malcus Stål, with descriptions of four new species from China (Hemiptera: Heteroptera: Malcidae) Author Wang, Shujing Author Bu, Wenjun text Zootaxa 2020 2020-04-01 4759 1 31 48 journal article 10.11646/zootaxa.4759.1.2 9b5efe0b-1ca6-4468-b462-227be30ffd37 1175-5326 3735937 1C32D464-B30D-4F6E-9D1D-46C84C8316B6 Malcus bacillus sp. nov. ( Figs. 3, 4 , 11, 12 , 18 , 23, 27 , 32 ) urn:lsid:zoobank.org:act: 5DEBE5FA-5985-4544-B2FF-A8D4126948E5 Description. Head, 1 st and 4 th antennal segments black. Collar of pronotum and posterior pronotal lobe dark brown. Pronotal callar region, median line on posterior pronotal lobe and posterolateral angle black, distinctly contrasting to the other parts of pronotum. Scutellum and corial tubercle black, clavus and corium dark brown. The outer margin of the anterior half of corium and the anterior part of corial tubercle yellowish brown. Membrane yellowish brown with fused dark brown patches. Head without any erect hairs. Labium reaching between fore coxae and middle coxae. Pronotum considerably declivent, without erect hairs, with a distinct black median line, the posterior end of the median slightly emergent. Posterolateral angle significantly raised, formed as oblong tubercles ( Figs. 11 & 12 ). Abdominal laterotergite V only slightly outward expanding, triangular, lateral margin with 3–4 small teeth; laterotergite VI expanding outwardly into a hook shape, lateral margin with small teeth; laterotergite VII significant outward expanding, trapezoidal, lateral and posterior margin with small teeth ( Fig. 18 ). Anterior part of 7 th ventrite of male sublaterally with protruding paired truncate processes ( Fig 32 ). Pygophore with 2 divergent slender stick-like parandria ( Figs. 23, 27 ). Measurements. As shown in Table 1 . Type material. Holotype , ♂ , China : Yunnan : Dehong Prefecture , Yingjiang County , Tongbiguan Township , alt:1531m– 1790m , 10.v.2009 , Min Li . Paratype , 1♂ , same locality as holotype, alt: 1530m , 20.v. 2009 , Min Li . Etymology. The specific name, bacillus , refers to its stick-like parandria. Remarks. The fork-like parandria exist in M. similis , M. furcatus , M. gibbus and M. bacillus sp. nov. The whole protonum black in M. similis , but pronotum dark brown with black median line and black posterolateral angle in M. bacillus . In M. furcatus , the posterolateral angle of the pronotum is only feebly indicated, and the parandria of the pygophore are thicker. M. gibbus , is smaller ( 4.4–4.45mm ), and the parandria of pygophore are significantly shorter ( Figs. 24, 28 ). Distribution: China ( Yunnan )