Macroscytus loksai, Lis, 2000

Macroscytus loksai sp. n.

(Figs 189­195)

DESCRIPTION

H e a d. Black, dorsal surface alutaceous, impunctate, except for setigerous punctures; gular plate impunctate in its anterior half, the posterior part coarsely punctate; bucculae coarsely punctate; clypeus free, as long as paraclypei, subapically without setigerous punctures, each paraclypeus submarginally with 2­3 setigerous punctures bearing hair­like setae (Fig. 190); eyes brown, small, ocular index 3.70­4.35; ocelli brown, small, interocellar index 3.8­4.2, ocellar index 8.4­ 8.6; antennae brown or dark brown, apical part of 4 th and entire 5 th segment yellowish brown; rostrum brown or dark brown, surpassing mid coxae.

P r o t h o r a x. Pronotum black; its disc polished, impunctate, except for setigerous punctures and numerous small, hardly visible punctures; transverse discal impression behind calli absent; lateral margins of pronotum with 4­5 submarginal setigerous punctures bearing long hair­like setae (Fig. 189). Prosternal carinae low, weakly punctate, but coarsely striated; anterior convexity of propleuron alutaceous with small punctures apically; posterior convexity and propleural depression with coarse punctures.

M e s o t h o r a x. Scutellum black, its disc at first looking sight impunctate, bearing numerous hardly visible tiny punctures, and a few large punctures close to apex. Mesopleural evaporatorium with coarse longitudinal rugae, its posterior wedge­shaped polished band slightly dulled, impunctate.

M e t a t h o r a x. Hemelytra almost black, meso­ and exocorium blackish brown; clavus with one complete and two partial short rows of punctures; mesocorial disc sparsely punctate with small punctures; exocorium densely punctate, punctures larger than those on mesocorium; mesocorium and exocorium separated along their entire length; costa narrow, convex, almost entirely separated from exocorium, costal margin punctate, but without setigerous punctures (Fig. 189); membranal suture almost straight; membrane semihyalnie, embrowned, its tip clearly surpassing the posterior extremity of abdomen. Metapleural evaporatorium with longitudinal rugae; lateral area of metapleuron impunctate, except for a small patch of punctures close to evaporatorium margin; posterior area with a row of coarse punctures.

L e g s. Femora and tibiae dark castaneous, tarsi brown; male hind femur with a row of setae on the ventral margin, and a row of very small denticles on the dorsal margin, subapical tooth absent (Fig. 191); male hind tibiae simple, without denticles and tubercles (Fig. 191).

A b d o m e n. Sterna almost black, distinctly punctate with large and coarse punctures only around spiracles and along segmental sutures. Ventral surface of male pygophore impunctate, its dorsal surface pilose, longitudinal sclerites on infolding of its dorsal rim well developed; penis as in Fig. 194, second conjunctival appendages as in Fig. 195, paramere as in Fig. 193, opening of genital capsule as in Fig. 192.

M e a s u r e m e n t s (in mm). Males only: body length 7.37­7.68; body width 4.01­4.11; head length 1.14­1.17; head width 1.71­1.82; pronotum length 2.19­ 2.24; pronotum width 3.65­3.68; scutellum length 2.68­2.71; scutellum width 2.22­2.32; antennal segments: 0.32­0.33: 0.40­0.46: 0.47­0.49: 0.65­0.67: 0.76­0.79.

TYPE DATA

Holotype male: Papua New Guinea, New Guinea (NE), Wau , 8.IX. 1968, NG­W.R. 19, leg. Dr. J. Loksa ( HNHM) .

MATERIAL EXAMINED

Holotype, and 1 paratype: Papua New Guinea: New Guinea (NE), Wau , 8.IX. 1968, NG­W.R. 19, leg. Dr. J. Loksa ( HNHM) .

COMPARATIVE NOTES

M. loksai is at first glance similar to another New Guinean species, M. papuanus , especially in its body puncturation and the absence of setigerous punctures on costal margins. Nevertheless, the new species can easily be separated from the latter by a number of submarginal setigerous punctures on head submargins (2­3 on each paraclypeus in M. loksai , only 1 in M. papuanus ). Both species differ also in a shape of paramere and 2 nd conjunctival appendages of penis.

DISTRIBUTION

Papua New Guinea.