Ismarus watshami sp. n. Figure 14A− E

Diagnosis .

In antenna colour pattern, Ismarus watshami sp. n. is similar to I. apicalis Kolyada & Chemyreva. The main difference between these two species is length of median longitudinal furrow on T2, radial cell/marginal vein ratio and posterior rim of scutellum shape: T2 with median furrow longer than half of length, radial cell slightly shorter than marginal vein and posterior rim of scutellum rounded in I. apicalis; T2 with median furrow shorter than half of length, radial cell distinctly shorter than marginal vein and posterior rim of scutellum slightly truncated to slightly emarginated in I. watshami .

Type material

(3♀♀4♂♂). Holotype, 1♀, BOTSWANA: Serowe Farmer’s Brigade, I.1993 (MT), R. Forchhammer leg., CJDAF010112 (deposited in CNCI). Allotype, 1♂, RHODESIA (ZIMBABWE): Salisbury, IX–XII .1975, A. Watsham leg., CJDAF010115 (CNCI). Paratypes, BOTSWANA: 1♀, Serowe, 1−20.XII.1984, R. Forchhammer leg., CJDAF010113 (CNCI); RHODESIA (ZIMBABWE): 1♀, Chishawasha, IX.1979, A. Watsham leg., CJDAF010114 (NHMUK); MALAWI: 1♂, Kasaungu, Mtunthama, VIII.1982, J. Feehan leg., CJDAF010116 (NHMUK); SOUTH AFRICA: 1♂, 75 km West South West of Natal, Eastcourt Cathedral Peaks Forest Station, 1400 m alt., 8-20.XII.1979 (MT), S. & J. Peck leg., CJDAF010117 (CNCI); 1♂, Tzaneen, 18-22.II.1983 (UV light), M. Coetzee leg., CJDAF010118 (CNCI).

Description.

Holotype (Female). Head. Head in dorsal view much wider than long (19:11), slightly wider than width of mesosoma (13:12) (Fig. 14 A–B); POL: 5; LOL: 3; OOL: 3 (Fig. 14A); ocelli large, LOL slightly longer than diameter of lateral ocellus (3:2); vertex behind ocelli nearly flat in lateral view; eye large and without setae; inner orbits, frons and temple with few sparse setae; above antennal sockets, face and cheek with few long setae; antenna much shorter than body length (8:11); scape and pedicel with scattered setae; A3-A15 with dense and short setae; antennal segments in following proportions (length:width): 16:4.5; 8:4; 10:3; 10:3; 7:3; 7:3.5; 6:4; 6:4; 6:4; 6:4; 6:4; 6:4; 6:4; 5:4; 9:4 (Fig. 14B).

Mesosoma. Pronotum in dorsal view rugose with whitish long setae; upper part of lateral pronotum distinctly rugose anteriorly, smooth and slightly concave posteriorly, lower part of lateral pronotum distinctly rugose; mesoscutum smooth and convex with pairs of long setae in front of scutellar pit; notauli present anteriorly as large pits (Fig. 14C); humeral sulcus deep and long, longer than length of tegula (17:13); scutellum smooth with sparse puncturation and slightly convex, posterior rim slightly truncated with slightly prominent posterolateral corners (Fig. 14C); anterior scutellar pit large and deep, as long as remaining scutellar disc, slightly crenulate at bottom, median keel distinct (Fig. 14C); mesopleuron smooth with deep crenulate line along posterior margin; metapleuron rugose and covered with dense whitish long setae.

Wings. Radial cell completely closed, 1.6 × as long as wide and 0.6 × as long as marginal vein (Fig. 14B).

Legs. Fore and mid legs slender; hind tibiae incrassate posteriorly, its maximum width as wide as hind femora.

Metasoma. Petiole short and distinctly expanded (5:7), punctate-rugose dorsally; tergites smooth, with scattered setigerous punctures; base of second tergite with several short costae basally and short median furrow, 0.35 × length of second tergite; sutures between tergites complete and deeply impressed.

Colour . Body black; antennae, tegulae and legs uniformly yellow except apical segment of antennae (A15) brown; wings hyaline, covered with brown setae.

Measurements. Head length 0.44 mm, width 0.78 mm; mesosoma length 0.92 mm, width 0.68 mm; metasoma length 1.08 mm; fore wing length 1.43 mm; body length 2.44 mm.

Male (Allotype). Body length 2.00 mm. Similar to female, POL: 11; LOL: 6; OOL: 7; lateral pronotum predominantly smooth except lower part punctate to rugose; anterior scutellar pit large and deep, slightly shorter than remaining scutellar disc (7:10); petiole distinctly short and expanded (8:13); base of second tergite with several short costae basally and short median furrow, 0.20 × length of second; radial cell completely closed, 0.5 × as long as marginal vein; blade-like carina on A4 percurrent (Fig. 14E); antennal segments in following proportions: 14:4; 6:3; 7:2.5; 7:3; 5:3.5; 5:3.5; 5:3.5; 5:3.5; 5:3.5; 5:3.5; 5:3.5; 5:3.5; 5:3.5; 9:3.5 (Fig. 14D).

Variation.

Body length 1.74-2.64 mm in both sexes. Posterior rim of scutellum slightly truncated to slightly emarginated; median furrow short, extending 0.20−0.35 × length of second tergite in both sexes.

Distribution.

Botswana, Malawi, South Africa, Zimbabwe.

Etymology.

This species is named after Anthony Watsham, who collected some of the type specimens.