Macroscytus insularis, Lis, 2000

Macroscytus insularis sp. n.

(Figs 164­170)

DESCRIPTION

H e a d. Castaneous, lateral parts of paraclypei somewhat darker in shade; dorsal surface alutaceous, impunctate, bearing only a few punctures laterally; gular plate almost entirely coarsely punctate, except for its anterior fifth; bucculae entirely coarsely punctate; clypeus free, as long as paraclypei, subapically without setigerous punctures, each paraclypeus submarginally with two setigerous punctures bearing hair­like setae (Fig. 165); eyes dark brown, ocular index 2.40; ocelli reddish brown, distance between ocelli about 7.5 times longer than the distance between ocellus and eye, ocellar index 6.0; antennae pale brown; rostrum yellowish brown, reaching mid coxae.

P r o t h o r a x. Pronotum castaneous; pronotal disc with a row of small punctures behind head, and a band of large punctures behind calli, the latter impunctate and elevated; transverse discal impression deep, well developed, bearing row of coarse punctures interrupted medially; lateral margins of pronotum with 5 submarginal setigerous punctures bearing long hair­like setae (Fig. 164). Prosternal carinae low, punctate; anterior convexity of propleuron almost entirely punctate with numerous small punctures, posterior convexity of propleuron punctate with large coarse punctures, propleural depression with a band of coarse punctures.

M e s o t h o r a x. Scutellum castaneous, basal fourth of its disc and scutellar apex impunctate, its remaining surface punctate with numerous punctures larger than those on pronotum. Mesopleural evaporatorium with distinct longitudinal rugae, its posterior wedge­shaped polished band with over a dozen large punctures.

M e t a t h o r a x. Hemelytra castaneous, puncturation colourless; clavus with one complete and two incomplete rows of punctures; mesocorial disc almost evenly punctate, punctures smaller than those on scutellum; puncturation of exocorium dense; mesocorium and exocorium separated almost along their entire length; costa broad, flattened, separated from exocorium only in its basal half, costal margin with two setigerous punctures bearing long hair­like setae (Fig. 164); membranal suture almost straight; membrane semihyaline, somewhat embrowned, its tip slightly surpassing the posterior extremity of abdomen. Metapleural evaporatorium with longitudinal rugae; lateral area of metapleuron impunctate, except for a band of punctures close to evaporatorium margin, posterior area with a band of coarse punctures.

L e g s. Femora and tibiae castaneous, tarsi pale brown; ventral margin of hind femur with a few denticles, dorsal margin with 2­3 subapical small teeth (Fig. 166); hind tibia with several small tubercles (Fig. 166).

A b d o m e n. Sterna castaneous, distinctly punctate in lateral two thirds, punctures around spiracles and trichobothria clearly smaller than remaining ones. Ventral surface of male pygophore impunctate, its dorsal surface pilose, longitudinal sclerites on infolding of its dorsal rim well developed; penis as in Fig. 169, second conjunctival appendages as in Fig. 170, paramere as in Fig. 168, opening of genital capsule as in Fig. 167.

M e a s u r e m e n t s (in mm). Male only: body length 7.92; body width 4.55; head length 1.35; head width 1.99; pronotum length 2.02; pronotum width 4.02; scutellum length 2.95; scutellum width 2.61; antennal segments: 0.35: 0.56: 0.57: 0.75, 5 th segment missing.

TYPE MATERIAL EXAMINED

Holotype male: Comoros: Moroni, Gde Comore, Malet , Coll. E. Fleutiaux, 1919, Muséum Paris ( MNHN) .

COMPARATIVE NOTES

The new species is similar to M. fryeri , M. mayottensis and M. comorensis , but it can easily be distinguished from all of them by deep and well developed transverse impression on its pronotal disc (transverse impression is shallow or absent in the other three species), and by its almost entirely punctate gular plate of head (it is punctate only in posterior half or third in the other three species).

DISTRIBUTION

Comoros.