Xyleborus festivus Eichhoff, 1876 Fig. 89A, B, I

Xyleborus festivus Eichhoff, 1876a: 202.

Xyleborus pinicola Eggers, 1930: 206. Synonymy: Smith et al. 2018b: 397.

Xyleborus detectus Schedl, 1975a: 458. Synonymy: Smith et al. 2018b: 397.

Xyleborus pinivorus Browne, 1980a: 374. Synonymy: Smith et al. 2018b: 397.

Type material.

Holotype Xyleborus festivus (UHZM). Holotype Xyleborus detectus (NHMW). Holotype Xyleborus pinicola (FRI), paratypes (NHMW, 1; NMNH, 2). Holotype Xyleborus pinivorus (NHMUK).

New records.

China: Fujian, Nanjing, Zhangzhou, 600 m, 3.iii.1962, Fusheng Huang, ex Pinus massoniana (NMNH, 5). Guizhou, Guiyang, Huaxi, 6.xi.2015, Y. Li, ex Pinus massoniana (UFFE, 1). Yunnan, sawmill near Ning’er, 19.vi.2010, Zhou, X-D, Pinus kesiya sawmill log (RABC, 1). Taiwan: Huisin Forest, 23.ix.2015, A. Black, J. Skelton, ex Pinus taiwanensis (UFFE, 1).

Diagnosis.

3.6-3.9 mm long (mean = 3.75 mm; n = 5); 2.85-3.17 × as long as wide. This species is distinguished by the declivity steep, appearing convex from lateral view; declivital interstriae 1-3 laterally broadened from base to declivital midpoint then narrowing towards apex; large body size; declivital posterolateral margin costate extending to interstriae 7; declivital interstriae 1 and 3 convex, interstriae 2 impressed; declivital striae feebly impressed; declivital interstriae 1 armed by 3-7 large denticles, interstriae 2 armed with denticles or unarmed (highly variable), declivital interstriae 3 armed by 4-9 large denticles, denticles on interstriae 1 and 3 uniform in height; declivital strial punctures moderately sized, fine, uniseriate, never confused.

Similar species.

Xyleborus affinis, X. cognatus, X. ferrugineus, X. perforans, X. pfeilii, X. volvulus .

Distribution.

China (Fujian, Guangdong, Guangxi, Guizhou, Yunnan), Japan, Myanmar, Taiwan, Thailand, Vietnam.

Host plants.

This species is unusual amongst Xyleborus in attacking only species of Pinus ( Pinaceae) (Wood and Bright 1992) including P. kesiya, P. massoniana, P. yunnanensis and P. taiwanensis (Li et al. 2020).

Remarks.

The Chinese host range and fungal associates of this species were recently reported (Li et al. 2020)