Chorebus (Etriptes) huangi, Zheng & Chen, 2017

Zheng, Min-Lin & Chen, Jia-Hua, 2017, The dacnusine genus Chorebus Haliday (Hymenoptera: Braconidae: Alysiinae) from China, Zootaxa 4294 (2), pp. 170-180 : 175-177

ChorebuS (EtripteS) huangi , sp. nov.

( Fig. 3 A–I)

Type material. Holotype: female: Tongyu County, Baicheng , Jilin Province, China, 14.viii. 2011, coll. Fen Huang . Paratypes: 1 male, Tongyu County, Baicheng , Jilin Province, China, 14.viii. 2011, coll. Fen Huang ; 1 male, Saihantala , Baotou, Inner Mongolia, China, 2. ix. 2010, coll. Chunguang Chang ; 1 female, Xiligeng , Baotou, Inner Mongolia, China, 2. ix. 2010, coll. Chunguang Chang .

Description. Holotype, female. Body 2.2 mm long.

Head. Antenna with 25 flagellomeres; first flagellomere 1.3× and 1.4× as long as second flagellomere and third flagellomere respectively; first and penultimate flagellomeres 3.7× and 1.9× as long as wide, respectively. In dorsal view ( Fig. 3 B), head 1.6× as broad as long. Eye 1.5× as high as broad, eye and temple almost equal in length. OOL: OD: POL=13:4:6. Occipital almost glabrous. Face ( Fig. 3 A) densely setose and distinctly punctured except a smooth and glabrous median longitudinal area, its width 1.5× its median height. Clypeus ( Fig. 3 A) 1.8× as wide as high, smooth and sparsely pubescent. Mandible ( Fig. 3 C) with 4 teeth, first tooth not expanded dorsally; second tooth distinctly longer than other teeth, pointed; third tooth (additional tooth) on the ventral edge of second tooth, only forming a small weak protrusion. Maxillary palp relatively short.

Mesosoma. Mesosoma 1.7× as long as high. Sides of pronotum glabrous, strongly rugose. Mesoscutum ( Fig. 3 D) densely and finely setose all over, distinctly punctured; notaulus complete, finely crenulate; medio-posterior depression of mesoscutum about 0.3× as long as mesoscutum, relatively deep on its posterior half. Scutellum relatively wide, somewhat protruding dorsally, densely setose and finely punctured. Mesopleuron shining, mainly glabrous; precoxal sulcus wide, extends virtually for the entire length of the mesopleuron, strongly crenulate. Propodeum sparsely pubescent, evenly rugose, with a median longitudinal carina extending posteriorly to the half of propodeum. Metapleuron ( Fig. 3 F) with a strongly rugose swelling on its lower half, densely pubescent but hardly forming a rosette.

Wings. Pterostigma 6.7× as long as wide. Vein 1-R1 relatively short, about 0.5× as long as pterostigma. Length of vein r equal to width of pterostigma, vein r 0.4× as long as vein 1-SR+M. Posterior half of vein 3-SR+M very slightly curved ( Fig. 3 F).

Legs. Hind coxa largely and finely rugose. Hind femur 4.2× as long as broad. Hind tibia 0.8× as long as hind tarsus. Second tarsomere of hind tarsus 0.6× as long as its basitarsus. Third tarsomere and telotarsus of hind tarsus equal in length ( Fig. 3 I).

Metasoma. First tergite ( Fig. 3 E) evenly widened towards its apex, 1.5× as long as its apical width, its apical width 1.5× its basal width, irregular striation, almost glabrous. Second tergite glabrous, finely sculptured and granulated on its transverse median area ( Fig. 3 E), remainder smooth. Third to the last tergite smooth. Ovipositor slender and short, hardly projecting beyond the apical tergite in the retracted position.

Colour. Head mainly black; antenna brown except scapus and pedicellus brownish-yellow; mandible brownish-yellow except edge of teeth reddish-brown; clypeus dark brown; labrum yellow; maxillary and labial palp pale yellow. Mesosoma black; tibiae mainly yellowish-brown, tarsi dark brown, femorae and coxae yellow. First metasomal tergite brownish-black; second and third tergites yellowish-brown; remaining tergites dark brown; ovipositor sheath brownish-black.

Variation. Body length 2.0– 2.2 mm; antenna with 24–25 flagellomeres; in dorsal view of head, 1.4–1.6× as wide as long.

Male. Similar to female. Body length 2.1–2.2 mm, antenna with 24–26 flagellomeres.

Biology. Unknown.

Etymology. The specific name “ huangi ” refers to the family name of the person who collected the female holotype.

Distribution. Known from Jilin, Inner Mongolia (Northeast and North Palaearctic China)

Remarks. This new species is similar to Chorebus (Etriptes) talaris (Haliday) , but differs as follows: 1) second tergite with sculpture on its transverse median area (sculptured only on its basal part in C.(E.) talaris ); 2) precoxal sulcus wide and strongly crenulate (relatively narrow and slightly sculptured in C.(E.) talaris ); 3) notaulus extend to the posterior part of mesoscutum (almost restricted to declivous fore part of mesoscutum in C.(E.) talaris ); 4) second and third tergite hardly setose (distinctly setose in C. (E) talaris ).

Figures

FIGURE 3 (A – I). Chorebus (Etriptes) huangi, sp. nov., ♀, A. head (frontal view); B. head (dorsal view); C. mandible; D. mesonotum (dorsal aspect); E. first and second metasomal tergite (dorsal aspect, arrow indicates the sculptured and granulated area); F. mesosoma (lateral aspect); G. fore wing; H. antenna (scapus, pedicellus, 1 st – 3 rdand last five flagellomeres); I. hind tarsus