Taxonomic review of Xenorhyncocoris Miller (Heteroptera: Reduviidae: Ectrichodiinae), with description of X. attractivus sp. nov. and notes on sexual dimorphism of the genus Author Chen, Zhuo 114B2A5A-3D0F-4E06-9C81-207BA77753B6 Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing 100193, China. insectchen625@126.com Author Liu, Yingqi DB34F0CC-7DC8-4BC7-8E3D-042239CA883D Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing 100193, China. yingqiliu0720@163.com Author Cai, Wanzhi 06A808A1-3AF2-46EE-AFCF-36B6F9D6DEE7 Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing 100193, China. caiwz@cau.edu.cn text European Journal of Taxonomy 2021 2021-04-16 746 1 26 49 http://dx.doi.org/10.5852/ejt.2021.746.1315 journal article 7263 10.5852/ejt.2021.746.1315 917a7b0c-caa8-4708-9984-bdb3a552eb74 2118-9773 4700114 FE4F837A-DB93-431E-AB0D-C2DCD0987B96 Xenorhyncocoris princeps Miller, 1949 Figs 46–56 Xenorhyncocoris princeps Miller, 1949: 235 . Holotype ( ♀ ): Malaysia , Selangor , NHMUK. Xenorhyncocoris princeps – Cook 1977: 70 . — Maldonado Capriles 1990: 78 . — Putshkov & Bérenger 1999: 92 . Diagnosis Only micropterous female known. Body length about 32 mm ; brown; head 1.8 times as long as pronotum; anteocular part 1.4 times as long as postocular part; labial segment II 1.9 times as long as segment III, reaching posterior margin of eye, nearly straight, apical ⅔ of ventral surface slightly thickened; pronotum as broad as its length, anterior lobe strongly swollen, posterior lobe as broad as width of anterior lobe; prosternum reaching anterior margins of mid coxal cavities; scutellum suberect; fore wing reaching apical ¾ of scutellum. Material examined Holotype MALAYSIA • ♀ ; Selangor , Ulu Tinggi ; 3.49240° N , 101.51658° E ; Feb. 1941 ; Goolden leg.; NHMUK 013587631 . Redescription Micropterous female MEASUREMENTS [in mm, n = 1 ( holotype )] ( Figs 46–48 ). Length of body (to apex of abdomen) = 31.80; length of head = 9.50; length of anteocular part = 4.10; length of postocular part = 2.90; greatest width of head = 4.60; width across eyes = 3.80; interocular space = 1.70; length of antennal segments I–IV = 4.10, 4.80, 1.50, 2.20; length of labial segments II–IV = 6.15, 3.20, 2.40; length of pronotum = 5.30; length of anterior pronotal lobe = 3.50; length of posterior pronotal lobe = 1.80; width of anterior pronotal lobe = 5.50; width of posterior pronotal lobe = 5.60; median length of scutellum = 1.50; basal width of scutellum = 3.00; apical prongs space = 1.35; length of fore femur, tibia, tarsus = 7.50, 7.00, 1.70; length Figs 46–49. Xenorhyncocoris princeps Miller, 1949 , holotype, ♀ (NHMUK 013587631), habitus. 46 . Dorsal view. 47 . Same, lateral view. 48 . Same, ventral view. 49 . Labels. Scale bar: 46–48 = 5.00 mm. of mid femur, tibia, tarsus = 7.20, 6.60,? (missing); length of hind femur, tibia, tarsus = 9.80, 9.70,? (missing); length of fore wing = 1.50; length of abdomen = 15.40; maximum width of abdomen = 11.40. COLORATION. Body generally brown; basi- and disti- (except apical ⅓) flagellomeres and posteromedian margin of valvifer I yellowish brown. Other body parts as in generic description. STRUCTURE. Body shape and vestiture as in generic description. Head ( Figs 50–53 ) 1.8 times as long as pronotum, 2.1 times as long as its maximum width; anteocular part 1.4 times as long as postocular part; antennal scape as long as anteocular part; labial segment II 1.9 times as long as segment III, reaching posterior margin of eye, nearly straight, ventral surface far remote from ventral surface of head, apical ⅔ of ventral surface slightly thickened ( Fig. 51 ); labial segment III moderately inflated ( Figs 51–52 ). Pronotum ( Figs 50–51 ) as broad across humeral angles as its length; anterior lobe 1.95 times as long as posterior lobe; posterior lobe as broad as width of anterior lobe; prosternum ( Fig. 52 ) reaching anterior margins of mid coxal cavities; scutellum ( Fig. 54 ) broad, suberect, with apical prongs short. Fore wing ( Fig. 54 ) scale-like, reaching apical ¾ of scutellum. Abdomen ovoid, 1.35 times as long as its maximum width. Figs 50–56. Xenorhyncocoris princeps Miller, 1949 , holotype, ♀ (NHMUK 013587631). 50 . Anterior part of body, dorsal view. 51 . Same, lateral view. 52 . Same, ventral view. 53 . Head, dorsal view. 54 . Scutellum, dorsal view. 55 . Posterior part of abdomen, ventral view. 56 . Same, caudal view. Scale bars: 50–52, 55–56 = 3.00 mm; 53–54 = 2.00 mm. FEMALE GENITALIA ( Figs 55–56 ). As in generic description. Male Unknown. Distribution Malaysia ( Selangor : Ulu Tinggi).