Tricosa cattienensis sp. n.

(Figs 19–22)

Diagnosis: 2.70–3.10 mm long (mean = 2.98 mm; n = 5); 2.50–2.70 times as long as wide. This species is distinguished by the discal interstrial punctures confused, protibia distinctly triangular, anterior margin of pronotum with a clear row of six moderate serrations. This species is very similar to C. indochinensis but can be distinguished by the smaller size and stouter form.

Type material: Holotype, female: VIETNAM: Dong Nai prov., Cat Tien NP, 11.42232, 107.42834, 128 m, 25.ii.2017, VN103, A.I. Cognato, T.A. Hoang, ex 1–3 cm dia branch (MSUC) . Paratypes, female: CHINA: Hong Kong, Kadoorie Farm, vi.2016, J. Skelton, P. Carlson, Y. Li, J. Hulcr (IZAS, 1) . JAPAN: Okinawa Pref., Iriomotejima Island, 20.ix.2016, H. Kajimura, ex Machilus thunbergii (MSUC, 1); as previous except Okinawa, Yona, 1.xi.2011, J. Hulcr, ex Castanopsis, uffeID 7388 (UFFE, 1) . THAILAND: Chiang Mai, Doi Suthep, 7.viii.2002, R.A. Beaver, K. Koivisto (RABC, 1); Phetchaburi, Kaeng Krachan NP, Ban Krang, ex Pterocarpus macrocar- pus, x.2017, S. Sanguansub (RABC, 1); Surat Thani, Ratchaprapa Reservoir, ex cut liana, 24.ii.2012, R.A. Beaver (RABC, 1)

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Description (Female): 2.70–3.10 mm long (mean = 2.98 mm; n = 5); 2.50–2.70 times as long as wide. Body densely setose; color ferruginous; appearing moderately slender, elytra attenuate. Mycangial tufts absent.

Head. As described for genus.

Pronotum. As described for genus except: 1.05 times as long as wide. Pronotum from lateral view with disc as long as anterior slope (type 7, Hulcr et al. 2007). In dorsal view, elongate, parallel-sided, anterior margin rounded (type 7; Hulcr et al. 2007), with a row of six serrations.

Elytra. As described for genus except: 1.71 times as long as wide. Discal interstriae punctures confused.

Legs. As described for genus except: protibiae distinctly triangular with 6 large denticles present on outer margin of apical third.

Etymology: In reference to the type locality, Cat Tien National Park, Vietnam.

Distribution: China (Hong Kong), Japan, Thailand, Vietnam.

Host plants: Known only from Pterocarpus (Fabaceae), Castanopsis (Fagaceae), Machilus (Lauraceae), and an unknown cut liana.