Derocrania (Derocrania) schaumi Horn, 1892

Abeywardhana, Lakmini, Mallawarachchi, Yashas & Dangalle, Chandima Deepani, 2021, The arboreal tiger beetles (Coleoptera: Cicindelidae) of Sri Lanka recorded from recent investigations, Zootaxa 5068 (3), pp. 378-398 : 390

Derocrania (Derocrania) schaumi Horn, 1892

Material examined: ♀ (n = 1), ( DOZE / UOCSL / LA023 ), 9.1865°N, 80.1501°E, Vellankulam , Mannar District, Northern Province, Sri Lanka, 23.4 m, 5 August 2018, D.L. Abeywardhana, on trunks and branches of mango and cashew trees of a fruit farm .

♀ (n = 1), ( DOZE / UOCSL / LA034 ), 6.4323°N, 80.7231°E, Waulpane , Ratnapura District, Sabaragamuwa Province, Sri Lanka, 342 m, 27 June 2019, D.L. Abeywardhana, amongst a cinnamon and pepper cultivation .

Measurements: BW 46.5 – 46.7, BL 14.49 – 15.73, HL 1.80 – 1.85, HW 2.06 – 2.07, ML 1.40 – 1.50, PL 4.10 – 4.13, PW 1.54 – 1.56, PI 2.64 – 2.66, EL 8.58 – 9.76, EW 3.17 – 3.20.

Diagnosis and description: Diagnosed at the generic level by small and slender body, large head that is always wider than the elytra in males and more or less equal in females, neck that is not parallel sided, frontal excavation not deep so that there is a very visible separation between the occiput and the neck, prominent eyes, narrow labrum with outward protruding lateral teeth, thin and sharp mandibles, significantly long and thin antennae that are brown in colour with the first two segments black, pronotum slender and narrow with a length/ width ratio of 2.0 to 3.0, elytra are welded but separable and elytral apex is truncated, aedeagus very thin and bent dorsally at the apex. Included in the subgenus Derocrania , as body length is greater than 14 mm, body robust with a long head, long vertex behind the eyes, transverse sculpture on pronotum. The species is defined by the bright black smaller body, smooth collum that is not sub-parallel sided, elytra that is wider than the head with sculpture formed by regular polygonal pits over entire surface. Very similar to D. scitiscabra , but differs by the smaller body length and apex which is curved dorsally ( Fig. 8 ).

Distribution: Species known only from Sri Lanka. Kekirawa ( Horn 1904); Trincomali, Hambantota, Kandy (National Museum Colombo).

Figures

FIGURE 8. Derocrania (Derocrania) schaumi Female