Macroscytus lobatus SIGNORET

Macroscytus lobatus SIGNORET

(Figs 182­188)

Macroscytus lobatus SIGNORET, 1883a: 470 ; LETHIERRY & SEVERIN 1893: 71; DISTANT 1913: 140; LIS 1999d.

DESCRIPTION

Body 11.32­11.61 mm in length, 6.43­6.63 mm in width, from dark castaneous to almost black.

Head dorsally at first sight looking impunctate, bearing small hardly visible irregularly scattered punctures, lateral parts of paraclypei slightly wrinkled, sometimes with a few large punctures; clypeus subapically without a pair of setigerous punctures, each paraclypeus only with 2 primary setigerous punctures, submarginal setigerous punctures absent (Fig. 183); ocular index 2.30­2.45; interocellar index 3.5­5.7; length of antennal segments (in mm): 0.51­0.55: 0.88­ 1.01: 0.78­0.93: 1.15, 5 th segment missing.

Pronotum with clearly visible puncturation, especially behind calli, punctures large and coarse; transverse discal impression behind calli well developed, deep, bearing large coarse, crowded punctures; lateral margins of pronotum without submarginal setigerous punctures, primary setigerous punctures on pronotal disc also absent (Fig. 182). Anterior and posterior convexities of propleuron coarsely punctate, punctures on the posterior convexity larger than those on the anterior, propleural depression with numerous coarse and deep punctures.

Scutellar disc densely coarsely punctate, punctures almost of the same size as those on pronotum, antero­lateral parts and apex impunctate.

Clavus with one almost indistinct and two well visible rows of punctures, its basal part with punctures between rows; mesocorial disc densely and almost evenly punctate, punctures smaller than those on scutellum; exocorium broad, densely and evenly punctate; costa broad, almost totally flatt, separated from exocorium only basally, costal margins punctate, but without setigerous punctures (Fig. 182).

Dorsal margin of male and female hind femur with a row of small, usually dark denticles (Fig. 184); male hind tibia with a few small denticles on its inner margin (Fig. 184); female hind tibia without denticles on the inner margin.

Abdominal sterna distinctly coarsely punctate in lateral two thirds.

Male genitalia as in Figs 185­188.

TYPE DATA

Lectotype male (designated by LIS, 1999d): Bourbon ( NHMW).

MATERIAL EXAMINED

Lectotype, and 2 other specimens: Réunion: La Réunion, Ile Bourbon , 2 exx. ( MNHN, UO) .

DISTRIBUTION

Réunion (Bourbon Island).