Coilodera grandimaculata Qiu, Xu, & Chen, new species

(Figs. 15–20, 50, 60–61, 68, 75–76, 85, 94)

Diagnosis. This species can be easily separated from other members of the C. penicillata species complex by the combination of the following characters: tomentum orange; male antennal club longer (Fig. 15); scutellum tomentose (Fig. 50); elytra tomentose maculae larger; apex of mesometasternal process rounded (Figs. 60–61); parameres elongate (Fig. 75).

Holotype (male). Length: 23.0 mm; width: 9.6 mm. Tomentum on body surface orange. Head and pronotum with wine-red and green metallic reflections; length of antennal club about twice length of antennomeres 2–7 combined. Posterior margin of median tomentose area of pronotum slightly curved. Scutellum fully clad with tomentum (Fig. 50). Posthumeral maculae distinctly larger than lateral maculae. Mesometasternal process short, apex rounded (Fig. 60); mesometasternal suture engraved, with numerous long setae. Pygidium with a large macula in middle. Sides of abdominal sternites 2–6 with tomentose maculae; abdominal sternite 6 with orange, long setae on both sides. Middle of abdomen glabrous, with a distinct groove (Figs. 16–17). Protibia with 3 teeth along outer margin, proximal tooth very small. Outer tooth of metatibia evidently shorter than ventral tooth (Fig. 68). Male genitalia as Figs. 75–76.

Allotype, paratypes (8 females). Body length 22.2–23.5 mm; width 10.2–10.3 mm. Similar to male with antennal club much shorter, lateral margin of pronotum slightly angular, posthumeral macula larger, posterior margin of the median tomentose area of pronotum notched, protibia slightly wider (Fig. 18), proximal tooth of protibia and external protrusion of mesotibia much sharper, apex of mesometasternal process slightly protrudent (Fig. 61), middle of abdomen convex, abdominal sternite 6 without tomentose macula (Fig. 19), and abdominal segment 7 more exposed.

Type material. CHINA: Xizang: ♂ (Holotype, SWU), 9.VIII.2014, Yarlung Tsangpo Grand Canyon Nature Reserve, Bononggong (80K), Mêdog County, 2,100 m, Wei-Wei Zhang. Paratypes (8♀♀): 1♀ (Allotype, SWU), 17.VIII.2017, Yarlung Tsangpo Grand Canyon Nature Reserve, Bononggong (80K), Mêdog County, 2,100 m, Jian- Yue Qiu & Hao Xu; 2♀♀ (QCCC), 18.VIII.2017, Yarlung Tsangpo Grand Canyon Nature Reserve, Bononggong (80K), Mêdog County, 2,100 m, Jian-Yue Qiu & Hao Xu; 1♀ (QCCC), 13.VII.2017, Yarlung Tsangpo Grand Canyon Nature Reserve, Bononggong (80K), Mêdog County, 2,100 m, Si-Yao Huang; 1♀ (QCCC) 13.VIII.2017, Yarlung Tsangpo Grand Canyon Nature Reserve, Pailong Valley, Pailong, Nyingchi County, 2,050 m, Jian-Yue Qiu & Hao Xu; 3♀♀ (QCCC), VIII.2014, Yarlung Tsangpo Grand Canyon Nature Reserve, Hanmi, Beibeng, Mêdog County, 2,200 m, Wei Hu.

Etymology. The specific epithet derived from the Latin adjective grandis (big, large) and the noun maculata (macula), and refers to the large yellow maculae on elytra.

Distribution. China: Xizang.

Natural history. Coilodera grandimaculata occurs sympatrically with C. penicillata and C. dives in Yarlung Tsangpo Grand Canyon (Brahmaputra Valley), Tibet (Fig. 86). The male holotype was collected under a street lamp at night (Mr. Wei-Wei Zhang, personal communication), and females were found visiting flower of Zanthoxylum sp. (Rutaceae) (Fig. 94) and Hydrangea sp. (Saxifragaceae) at the type locality. Larvae and pupa were also found in decayed wood within the cockroach galleries of Salgunea sp. (Blattodea: Blaberidae: Panesthiinae).