Indomias lividus ( Marshall )

Y, R A M A M U Rt H & Ayri, Shaloo, 2010, Revision of the genus Indomias Marshall (Coleoptera, Curculionidae, Entiminae, Tanymecini) from India, Zootaxa 2357, pp. 1-49 : 35-36

12. Indomias lividus ( Marshall)

(figs. 9, 33, 60, 102, 103, 104, 174, 219, 220 and 221)

Sympiezomias lividus Marshall, 1916: 166 ; 1941: 350 [BMNH]

Description: Colour black or piceous, with dense, greyish vestiture, varied, with small, vague darker markings or else with brownish vestiture, with a pale greenish reflection or with metallic green vestiture. Head 1.1x as long as rostrum, upper surface convex, with fine, scattered punctations, frons impressed. Rostrum deeply impressed at middle dorsally, as broad as long; anterior margin 0.75x as broad as posterior margin; median furrow short, uniformly broad and rounded at either ends; lateral carinae distinct, reaching up to anterior margin of eye; scrobes much longer, 0.8x as long as rostrum, uniformly broad, smoothly rounded and parallel at either ends. Eyes dorsolateral, convex, 2x as long as broad, space between eyes as much as between scrobes (figs. 9 and 33). Antennae reddish brown; scape gradually clavate; funicle with first segment 1.1x as long as second, all funicular segments with whorl of hairs at middle; club densely hairy throughout, its joints invisible due to hairy appearance (fig. 60). Prothorax 1.04x as long as broad, breadth at middle 1.1x as that of posterior margin; sides more rounded and narrower in male than female; anterior margin only 0.83x as broad as posterior margin, truncate dorsally and acute laterally, posterior margin subtruncate; upper surface with shallow, subconfluent punctations, more or less hidden behind vestiture, with a faint zig zag stria, with broad depressions at lateral sides, due to impression. Legs with hind tibial apex without any dense, golden yellow hairs. Elytra ovate, basal margin slightly raised, humeral fold distinct, having almost the appearance of a true shoulder, so that external basal angle becomes obtuse, posterior declivity not impressed; apices not or scarcely mucronate; stria with comparatively large and deep punctations; intervals not much broader than stria, third and fifth 1.33x as broad as the others and more raised, usually alternate ones slightly raised, elongate scales on the intervals short, recumbent and inconspicuous, except sparsely at apex; elytral vestiture with three types of scales, predominant flat, circular, orange red, with irregular impressions and a hyaline outer core (fig. 104), less predominant oval, with ridges (fig. 103), the least predominant round, with ridges starting a little distance away from base (fig. 102).

Male genitalia: Aedeagus with median lobe slender apex rounded, almost uniformly broad throughout; length: breadth ratio 5.33:1, becomes broadest at its junction with apophyses; apophyses 0.62x as long as the median lobe (figs. 219–220). Tegmen with dorsal and basal pieces equally broad; parameres very long, slender, their apices indistinct; manubrium moderately long, 0.62x as long as the median lobe, more or less uniformly broad, with apex slightly deflected and rounded (fig. 221). Spiculum gastrale 1.25x as long as median lobe and 2x as long as manubrium, broadened towards base, its apex narrowed, deflected and bent; basal prongs almost equal, massive, their apices pointed (fig. 174).

Length: male, 9.40 mm; Breadth: male, 3.13 mm.

Specimens examined: 1 male, INDIA: Tamil Nadu: Nilgiris, Coll. T. V. Campbell, without date; 1 male, Karnataka: Chickaballapura, Coll. T. V. Campbell, without date.

Distribution: India: Karnataka: Chickaballapura; Tamil Nadu: Nilgirii Hills.

Taxonomic note: Marshall (1916) states that intervals are of equal height and only sometimes the alternate ones are raised but on the contrary alternate intervals are raised and intervals are not of equal height.