Pygolampis striata: Miller 1940: 455, New species, description and figures (Fig. 25; 10–12); Maldonado 1990: 532, catalogue; Tomokuni and Ishikawa 2008: 374, checklist.

Pygolampis sp.: Ishikawa and Miyamoto 2012: 282, description, distribution and biology. Field Guide; Ishikawa 2016: 450, catalogue; Komatsu 2016: 93, description and biology. Field Guide.

Male. Colouration. Body generally whitish-brown to pale brown on dorsal side (Fig. 1a). Head pale brown on dorsal side and ventral side (Fig. 1c); head dark brown on lateral side, with longitudinal blackish lines (Fig. 1d). Compound eyes black; ocelli reddish-brown. Antennal segment I pale brown, II-IV dark brown. Visible labial segments I–II pale brown, III dark brown. Thorax dark brown with longitudinal whitish-brown lines on lateral side and dark brown on ventral side. Hemelytra generally whitish-brown to pale brown, with blackish spot in vein of cubitus. Abdomen (Fig. 1e) pale brown on dorsal side with sparse brownish spots, dark brown on ventral side with sparse yellow spots; connexiva yellow with brownish spots on segments II-VI. Legs whitish-brown to pale brown; profemur with irregular markings on outer surface; pro- and mesotibia with dark brown annulations on basal third and apex; tarsus dark brown.

Figure 1.  

Pygolampis striata Miller, 1940. a–b: dorsal view, a. male, b. female, c–d: male head and pronotum, c. dorsal view, d. lateral view, e–f: apex of abdomen, e. male, f. female. Scale bar: a, b 5.0 mm; c–f 1.0 mm.

Vestiture. Head densely covered with whitish decumbent pubescence, interantennal tubercle with setae at apex. Eye glabrous. Antennal segment I with decumbent pubescence; segments II–IV with whitish sub-erect setae, as long as the diameter of each segment. Labium with sparse short blackish sub-erect setae, as long as the diameter of half of each segment. Pronotum with densely covered whitish pubescence, three longitudinal rows of whitish pubescence rows on lateral side. Scutellum without pubescence. Hemelytra with whitish pubescence on the corium and veins. Abdomen with fine pubescence. Hind leg tibia with setae subapically; mid- and hind leg tibia with dense setae uniformly.

Structure. Body elongate. Head (Fig. 2a, b) oblong, approximately 1.7 times long as eye width, approximately 0.8 times long as pronotum; ante-ocular portion approximately 1.25 times long as postocular portion, with glabrous lines in the basal half, diverging apically; ante-ocular part with four glabrous lines on dorsum. Compound eye protuding laterally, hemispherical; ocelli upwardly prominent. Interantennal tubercle diverging apically, upwardly prominent. Postocular tubercule and lateroventral tubercle short, irregular. Antenna (Fig. 2c) cylindrical; scape (antennal segment I) approximately 1.0–1.1 times as long as head length; approximate proportion of segments I to IV 9: 10: 1.9: 5. Labium approximate proportion of visible segments I to III 1: 0.3: 0.2; visible segment I straight, segments II and III curved. Pronotum long, trapezoidal on longitudinal sulcate in middle, widened posteriad, approximately 1.6 times as long as its maximum width; postocular lobe elevated, with six longitudinal carina dorsally; posterolateral angle elevated, obtuse; ante-ocular propleural spines short, robust, approximately 0.5 times as long as eye width. Scutellum longer than wide, with medial oval depression. Hemelytra macropterous, extending beyond base of the abdominal segment VII. Abdomen (Fig. 2d), segment V widest, posterior angle projecting backwards, weakly concave at middle. Femur longer than tibia, hind leg femur extending to level of segment VII.

Figure 2.  

Pygolampis striata Miller, 1940, a–b: head, a. dorsal view, b. lateral view, c. antennal segment I, d–e: apex of abdomen ventral view, d. male, e. female, f–h: pygophore, f. lateral view omitted on left paramere, g. caudal view, h. dorsal view, i. parameres, j–k: phallus, j. lateral view, k. dorsal view (Lettering: Bp = Basal plate; Pd = pedicel; Plb = phallobase; Plt = phallotheca), l styloides. Setae omitted in a, b, d–k. Scale bar: a–e, 1.0 mm, f–l, 0.5 mm.

Male genitalia. Pygophore (Fig. 2f–h) elongate, rounded dorsal view; dorsally membranous, anteroventral surface granulated; median process short, robust, lateral side depressed; parameres (Fig. 2i) symmetrical, apical portions relatively broad, weakly curved, twisting; phallus shown as Fig. 2j–k; phallobase membranous, boundary with pedicel unclear; phallotheca oval when viewed from above in dorsal view, approximately 1.8 times as long as pedicel, struts invisible from outside.

Female. General aspect as in male (Fig. 1b), but different as follows: ventral posterior margin of abdominal segment VI with strongly incised middle, abdominal apical segment strongly produced (Fig. 1f, Fig. 2e); styloides (Fig. 2l) incised in half of the apical part, with setae on margin; posterior femur extends beyond abdominal segment VI, apex of posterior femora not reaching abdominal segment VII.

Measurements: [in mm, male (n = 7)/female (n = 9)]. Body length 15.80–16.50/17.50–19.50; head length 2.05–2.25/2.00–2.35; length of anteocular part 0.85–0.90/0.85–1.00; length of postocular part 0.65–0.75/0.65–0.75; lengths of antennal segments I 2.25–2.35/2.40–2.95, II 2.25–2.60/2.30–2.80, III 0.40–0.50/0.40–0.60, IV 0.80–1.30/0.90–1.25; lengths of visible labial segments I 1.35–1.60/1.50–1.75, II 0.45–0.55/0.40–0.50, III 0.35–0.40/0.30–0.40; length of pronotum (including propleural spines) 3.00–3.30/3.10–3.75; maximum width of thorax 1.75–1.95/1.75–2.10; length of scutellum 0.75–1.00/0.80–1.05; maximum width of scutellum 0.50–0.60/0.50–0.75; length of the hemelytron 9.1–10.0/10.0–11.5; length of fore leg femur 3.00–3.20/3.00–3.20, tibia 2.70/2.70, tarsus 0.65–0.70/0.70; of mid-leg femur 3.40–3.50/3.20–4.00, tibia 2.75/2.75–3.20, tarsus 0.75–0.80/0.65–0.80; of hind leg femur 7.50–8.00/7.50–8.00, tibia 7.50–8.00/7.50–8.00, tarsus 0.90–1.00/0.90–1.00.

This species can be distinglished from other species of Pygolampis by the following set of characters: body length 15.80−16.50 mm in the male, 17.50−19.50 mm in female, generally whitish-brown to pale brown, with densely covered whitish decumbent pubescence on dorsal side; pronotum with three longitudinal rows of whitish pubescence on lateral side; abdomen dark brown on ventral side with sparse yellow spots; abdominal segment VII posterior angle shown as Fig. 1e.

In general appearance, Pygolampis striata Miller, 1940 is very similar to P. bidentata (Gozze, 1977), but can be distinguished from the latter by a combination of the following characters: generally whitish-brown to pale brown (in P. bidentata, generally dark brown); thorax with three longitudinal rows of whitish pubescence on lateral side (in P. bidentata, thorax without three longitudinal rows); abdomen dark brown on ventral side with sparse yellow spots (in P. bidentata, abdomen without sparse yellow spots ventrally). Additionally, similar distribution to P. foeda Stål, 1859 in Japan, but can be distinguished from the latter by a combination of the following characteristics: pale brown body and thorax with three longitudinal rows of whitish pubescence on lateral side. (in P. foeda, generally reddish-brown-dark brown, thorax without three longitudinal rows of whitish pubescence on lateral side); scape approximately 1.0–1.1 times as long as head length (in P. foeda, scape approximately 1.2–1.4 times as long as head length); posterior angle projecting backwards, weakly concave at middle. (in P. foeda, posterior angle projecting backwards, slightly deep concave at middle).

Japan: Honshu, Kyusyu, Ryukyus [Amami-ôshima Is.], Indonesia [East Kalimantan], Malaysia [Sandakan].

In Honshu, Japan, there is no specimen of the collection since 1981, indicating the likelihood that the species might be extinct in the region.