Macroscytus howei J.A. LIS, 2000

Macroscytus howei J.A. LIS

(Figs 157­163)

Macroscytus howei J.A. LIS, 1997a: 28 , 1999a: 471.

DESCRIPTION

Body 7.62­8.42 mm in length, 4.60­5.21 mm in width, from dark castaneous to black, apices of umbones and the posterior margin of pronotum narrowly yellowish brown (in dark castaneous specimens only the apices of umbones are slightly brightened), hemelytra usually more brownish in shade than pronotum and scutellum.

Head dorsally impunctate; clypeus subapically without setigerous punctures, each paraclypeus with a row of 3­6 submarginal setigerous punctures bearing long hair­like setae (Fig. 158); ocular index 2.00­2.60; interocellar index 5.0­6.0; length of antennal segments (in mm): 0.29­0.32: 0.42­0.56: 0.49­0.58: 0.60­ 0.66: 0.62­0.72.

Pronotal disc with a few small, hardly visible punctures; posterior half of pronotal disc with tiny and almost invisible transverse wrinkles; lateral margins with 7­10 submarginal setigerous punctures bearing long hair­like setae (Fig. 157). Propleural depression with a row of coarse punctures, anterior and posterior convexities of propleuron with few small punctures.

Scutellar disc with small, almost invisible punctures, and a few tiny transverse wrinkles.

Corium with numerous irregular wrinkles, at first sight looking almost impunctate; mesocorial disc entirely impunctate or sparsely punctate in its posterior half; exocorium broad, expanded laterally, impunctate; costa narrow, flat, almost entirely separated from exocorium, its posterior fifth fused with the latter, costal margin with 2­4 setigerous punctures bearing long hair­like setae (Fig. 157).

Femora dark brown or brown, tibiae usually paler than femora; male and female hind femora simple, spines and teeth absent (Fig. 159); male and female tibiae without denticles on inner margins (Fig. 159).

Abdominal sterna almost impunctate, bearing only rows of small punctures close to segmental sutures, and triangular patches of well visible punctures posterior to spiracles.

Male genitalia as in Figs 160­163.

TYPE DATA

Holotype male: Australia, Lord Howe Island, the Clear Place ( QMB) .

MATERIAL EXAMINED

Holotype, and 4 paratypes: Lord Howe Island: Stevens Reserve , 1 paratype ( QMB) ; The Clear Place , 1 paratype ( QMB) ; Lorhiti Lodge , 1 paratype ( QMB) ; Base of Mt Eliza , 1 paratype ( UO) .

DISTRIBUTION

Lord Howe Island.