Stiliderus rugulosicollis n. sp.

Holotype (♂): Indonesia, S. Sulawesi, Tanah Toraja, Pulu Pulu, 1700 m, 13.–16.VIII.1990, leg. A. RIEDEL (SMNS) .

P a r a t y p e: 1 ♀, same data as holotype (CRO) .

Description

Body length 5.8 mm. Proportions of paratype: length of head: 87; breadth of head: 80; diameter of eye: 25; length of antenna: 195; length of pronotum: 90; breadth of pronotum: 69; length of elytron: 92; breadth of elytra: 100; metatibia: 100; metatarsus: 55.

Black, mandibles, margins of labrum and palpi rufotestaceous; tibia and tarsi dark reddish brown, the latter more or less infuscate; holotype (teneral) with elytra and abdomen brown, antennae and legs entirely testaceous. Fore-body see Fig. 31.

Male: abdominal sternite VII unmodified; sternite VIII with a broad, very shallow emargination. Aedoeagus see Fig. 19 (the specimens are somewhat teneral; the very weakly sclerotised aedoeagus is collapsed and could not be illustrated in ventral view).

Female: [abdominal segment X missing].

Differential diagnosis

S. rugulosicollis n. sp. runs to S. conicollis from Tanah Toraja in my key to the Celebesian species (ROUGEMONT 1996: 726). It differs from S. conicollis in its coarser cephalic puncturation, coarser and more regular sculpture of the pronotum, which consists of thick, scarcely interrupted longitudinal rugae leaving the mid-longitudinal band isolated from the first longitudinal rugosity on either side by a deep groove; it differs also in the somewhat smaller and more sparsely punctured elytra, and by an almost total absence of pubescence on the fore-body (short and erect on elytra, forwardly recumbent on pronotum, and particularly conspicuous on head in S. conicollis), and in the conformation of the aedoeagus.