Copelatus brivioi Rocchi, 1976

(Figs 3, 11–12)

Copelatus brivioi Rocchi, 1976: 177 .

Type locality. “Dinajpur, Bengla-Desh” [Bangladesh, Rangpur Division, Dinajpur, ca. 25°37’N 88°38’E] .

Type material. Paratype ♂ (PMNH), labelled: “ EAST PAKISTAN / Dinajpur / XI-70 Barbe’ [p] // Ex Pontificum Institutum / Missionum Exterarum, / Detroit, Michigan; 1984. / Purch. from Carlo Brivio [p] // PARATYPUS [p, pink label with black frame] // COPELATUS / BRIVIOI / N. SP. [hw] / Rocchi S. det 19 [p] 76 [hw] // YPM - ENT / 500554 [p]” .

Additional material examined. NEPAL: 1 ♂, Sudurpashchim Province, Kanchanpur District, [ca. 9 km SE] Mahandranagar [= Bhimdatta], Shuklaphanta Nature Reserve, Dsauda river, 28°53’51’’N 80°13’39’’E, 160 m, 1.vii.2017, A. Kopetz leg. (ASCG) . INDIA: West Bengal: 2 ♂, Jalpaiguri District, Bagrakote, 200–300 m, 16.–22.xii.1985, B. Bhakta leg. (NHMB, NMPC) .

Diagnosis. TL: 5.3–5.8 mm. Head dark brown, clypeus paler, reddish; pronotum dark brown, laterally reddish, pale colouration extending anteriorly; elytra brown blackish with yellowish sides laterally from dorsal stria 6, and with variable yellowish pattern consisting of: two small basal spots anteriorly from elytral striae 2 and 5 respectively, yellowish stripes in posterior half of elytra between striae 3–5, and yellowish stripe starting at 1/5 or 1/4 of elytral length between striae 5–6. Pronotum with coarse punctures laterally. Each elytron with six discal striae and one submarginal stria: stria 1 beginning approximately at 1/5 of elytral length, ending close to elytral apex; striae 2, 3 and 5 ending subapically; stria 6 shortest, ending at apical fifth; submarginal stria long, beginning at elytral mid-length and ending subapically at level of striae 2, 3 and 5 (Fig. 3). Male longer spur on metatibia sinuate in apical third. Median lobe of aedeagus in lateral view (Fig. 11) broad in basal 2/3; apical third sickle-shaped, regularly curved to obtuse apex; at 2/3 of its length with two distinct ‘teeth’ on ventral side—a broad rectangular proximal one, and a narrower, apically broadened and truncate distal one. Parameres with distinct lobe on inner margin (Fig. 12). Female identical to male in habitus, punctation of elytra slightly coarser, disc of elytra laterally from stria 2 with striolae (Rocchi 1976).

Distribution. The species was so far only known from the type locality in north-western Bangladesh; here we present new records from western Nepal and north-eastern India (West Bengal), all from a lowland strip south of the Himalayas (Fig. 19).