Monolepta empatbulat sp. nov.

urn:lsid:zoobank.org:act: 7640433E-FB08-4E32-956A-20EE24D45BDA

Figs 45–47

Type material. Holotype: ♂ “ Brunei, Labi, Bukit Teraja 60 m, Mxt. Dipt. Forest, B.M. 1983-39, Light trap 1,75 m above ground, 21.VIII.79, S. L. Sutton, 906, 2634” (BMNH; Fig. 46). Type locality: 4º18′ N / 114º26′ E . – Paratypes: Brunei. 2 ex., same data as holotype; 3 ex., same data but 24.VIII., 26.VIII. (BMNH). – Indonesia. 1 ex., Indonesia, Borneo, Kalimantan Tengah Busang / Rekut conf., 0º03′ S / 113º59′ E, VIII.2001, Brendell / Mendel (BMNH) . – Malaysia.; 1 ex., Tawai, 1300ft., 8 m S. Telupoid, 5°30′ N / 117°24′ E, IX.1977, M. E. Bacchus (BMNH) .

Etymology. The name refers on the elytral colouration with four spots. Empatbulat means “four spots” in Malay. Description

Total length. 3.25–3.80 mm (mean 3.55 mm; n = 10).

Head. Very finely punctuated, entirely blackish and shining, also labrum and mandible blackish. Antenna long and slender, blackish and only three basal antennomeres yellowish (Fig. 47A). Second antennomere slightly shorter than third; ratio length of second to third antennomere 0.67–1.00 (mean 0.93), ratio length of third to fourth antennomere 0.29–0.43 (mean 0.34; Fig. 47B).

Thorax. Pronotum finely punctuated, broad, entirely yellow to brownish-yellow. Pronotal width 0.95–1.20 mm (mean 1.06 mm), ratio length to width 0.63–0.66 (mean 0.64). Scutellum, meso- and metathorax black. Elytra elongated and broadened towards apex. Elytron black, with four yellowish spots (Fig. 46b, 47A). Elytral length 2.50–2.75 mm (mean 2.67 mm), maximal width of both elytra together 1.80–2.00 mm (mean 1.92 mm), ratio of maximal width of both elytra together to length of elytron 0.70–0.73 (mean 0.72). Legs yellow-brownish and distal parts of femur and tibia brown to blackish (Fig. 46b).

Abdomen. Yellowish-brown, darker in the middle and apical part of the abdomen.

Male genitalia. Median lobe broad and conical towards apex. Tectum broad at base and narrowing towards apex. Median spiculae of long, slender and flattened, ventral spiculae shorter, club-shaped, jagged-like apically, lateral spiculae club-shaped, basally widened (Fig. 47C).

Female genitalia. Spermatheca with small spherical nodulus, median part and cornu long and slender (Fig. 47D). Bursa sclerites of similar size, strongly sclerotized and with strong spines (Fig. 47E).

Diagnosis. Monolepta empatbulat sp. nov. is most similar to M. mohamedsaidi sp. nov. and M. zonula in colouration and size. These species have a black head, black elytra with yellow spots, and black meso- and methothorax in common. M. zonula can be distinguished by yellow antennae (Fig. 25A) from the other two species with predominantly black antenna (Figs. 47A, 56A). The legs of M. empatbulat sp. nov. are partly brownish to black, while the other two species have entirely yellow legs. In any doubtful cases the strong differences in the genitalic morphology of both species allow a clear allocation (Figs 25C–E, 47C–E, 56C–E).

Distribution. Only known from Borneo (Brunei, Kalimantan and Sabah; Fig. 45).