Stilbocoris solivagus Bergroth, 1893

Kondorosy, Előd & Zámbó, András, 2021, The genus Stilbocoris in the Malagasy area (Hemiptera: Heteroptera: Rhyparochromidae), Zootaxa 5047 (4), pp. 416-430 : 419-421

Stilbocoris solivagus Bergroth, 1893

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( Fig. 1 )

Type material examined. Syntype: Seychelles Islands , Mahé (1 ♂, MNHN) .

Other material examined. SEYCHELLES ISLANDS: Seychelles / Mt. Fleuri [hw] Mahe [pr]/11: iii [hw]: 1972/ P. J. L. Roche [pr]//7168 [hw]// Stilbocoris /solivagus ♂ / BERGR./det. J. A. Slater /1975 [hw] (1 ♂, RMNH); Seychelles [pr]/ Mt. Fleuri [hw]/ Mahe [pr]/27: ii [hw]:1972/ P. J. L. Roche [pr]//7162 [hw]// Stilbocoris ♀ [hw]/so- livagus [hw]/BERGR. [hw]/det. J. A. Slater [hw]/1975 [hw] (1 ♀, RMNH); Seychelles/Mahe/27-30. X. 75/ M. Saaristo (2 ♂♂, NMWC) .

Redescription. Colour. Body brown; head and apical margin of corium fuscous; posterior lobe of pronotum pale brown; scape, labium except fuscous apex of labiomere IV, humeral angles of pronotum and legs vivid yellow; hemelytra except punctures pale yellow; distal 2/3 of distiflagellum white; membrane translucent.

Integument. Body shiny except abdomen. Head dorsally with rather strong and dense punctures, leaving area around ocelli impunctate; ventrally with fine dense confluent punctures, surface slightly rugose. Pronotum coarsely and sparsely punctate (at anterior margin mostly very densely), callar elevation very sparsely and finely punctate. Anterior part of scutellum with similar punctures as posterior half of pronotum, laterad of slightly elevated Y-shaped elevation with extremely dense and coarse punctures. Punctures of clavus and corium also rather strong (similar to punctures of pronotum), fine in row along scutellum and near apical margin of corium; exocorium and area between fracture of corium and row along vein Cu (except posterior part) impunctate. Sternum with dense strong punctures except smooth metepimeroid and sparse punctures of proepisternum. Abdominal venter finely and densely punctate.

Vestiture. Head almost glabrous dorsally, just with some inserted short decumbent setae close to eyes and moderately densely covered with short fine decumbent pubescence ventrally. Scape bearing 3–4 strong stiff erect setae thicker than other setae of antennomeres but slightly more slender than strong stiff erect setae of tibiae; all antennomeres moderately densely covered with fine semidecumbent and tiny stiff erect setae. Pronotum with some scattered erect setae not longer than diameter of pedicel at base; prosternum with short decumbent setae along anterior margin reaching over base of head. Scutellum, hemelytra and sternum glabrous. Abdominal venter densely covered with decumbent pubescence of similar length as pronotal setae. Legs covered with short semidecumbent setae, longer on tibiae and apex of each tarsal segment; coxae with some long erect setae. Femora with a pair of apical setae dorsally, profemora armed ventrally with 2 stiff erect setae on apical one-fourth and about five fine erect setae of similar length between base and stiff setae (about as long as diameter of scape in basal half), mesofemora unarmed, metafemora armed with 1 stiff erect seta in subapical position ventrally. Protibiae without stiff setae except apex; meso- and metatibiae with 4 rows of strong erect stiff setae (longer than diameter of tibiae).

Structure. Labium reaching mesocoxae, labiomere I almost reaching base of head. Callar region of pronotum slightly elevated both in lateral and dorsal view. Transverse impression of pronotum weak. Lateral margin of pronotum hardly laminate, width less than half of diameter of base of pedicel and clearly concave at level of transverse impression (pronotum somewhat campanulate), posterior margin hardly concave, almost straight; anterior lobe slightly longer posterior. Y shaped elevation of scutellum hardly developed.

Male genitalia. Pygophore subglobose, very similar to pygophore of S. slateri sp. nov. ( Fig. 5 ), only ventral sinus somewhat longer and more rounded in S. solivagus (dorsal: ventral sinuses of S. slateri 2.5:1, S. solivagus 2:1), lateral teeth of S. slateri somewhat thicker. Paramere with elongate blade, basal part subparallel, apically triangular and slightly curved inwards and about 5.17 times longer than widest part, inner projection very short triangular, outer projection somewhat longer, apically rounded, shank 2 times longer than wide.

Measurements (3 males, 1 female): Total body length: 3.21–3.32; head: length 0.45–0.63, width 0.60–0.71, interocular space 0.38–0.42; length of antennomeres: I 0.42–0.45, II 0.66–0.81, III 0.65–0.66, IV 0.69–0.72; length of labiomeres: I 0.36–0.39, II 0.40–0.48, III 0.34–0.41, IV 0.15–0.19; pronotum: length 0.72–0.80, width 1.14–1.20; scutellum: length 0.78–0.81, width 0.75–0.78.

Distribution. Endemic to Seychelles Islands (known only from Mahé).

Figures

FIGURES 1–4. Dorsal views of Stilbocoris species: 1. Stilbocoris solivagus Bergroth, 1893, 2. Stilbocoris galla Linnavuori, 1978, 3. Stilbocoris triangularis Linnavuori (Photos: authors), 1978 4. Stilbocoris scudderi sp. nov. paratype, dorsal view (Photo: Csaba Pintér).

FIGURES 5–9. Male genitalia of Stilbocoris species: 5–6: S. slateri sp. nov.: 5: pygophore (dorsal view), 6: left paramere; 7–9: S. scudderi sp. nov.: 7–8: pygophore (dorsal and caudal views), 9: left paramere. (Drawings: Szilvia Kovács).