Alysia hebeiensis, Zhu & Achterberg & Chen, 2018

Zhu, Jia-Chen, Achterberg, Cornelis Van & Chen, Xue-Xin, 2018, Review of the genus Alysia Latreille (Hymenoptera, Braconidae, Alysiinae), with description of six new species from China, Zootaxa 4500 (1), pp. 1-42 : 4-7

Alysia hebeiensis sp. n.

Figs 1–2

Type material. Holotype, ♀ ( ZJUH), “ [NE. China:] Hebei, Mt. Xiaowutai, Shanxunkou , 25.?.2005, Shi Min, No. 200608372” . Paratype: 1♀ ( ZJUH), Guizhou, Mt. Leigong, Linchang, 31.?.2005, Zhang Hongying , 200605374 .

Diagnosis. Body black ( Fig. 1); 2 basal antennomeres, mandible brownish yellow ( Fig. 1); palpi yellow; third antennomere (including annellus) 1.3 × longer than fourth antennomere ( Fig. 2G ); eye in dorsal view 1.2 × as long as temple ( Fig. 2I ); eye in lateral view 1.1 × higher than wide ( Fig. 2K ); frons ( Fig. 2I ), vertex and temple smooth ( Fig. 2I ); face smooth, 2.0 × wider than high, rather convex medially and with one longitudinal ridge ( Fig. 2J ); clypeus small and semi-elliptical and smooth ( Fig. 2J ); precoxal sulcus widely crenulate, reaching middle coxa and anterior edge of epicnemial area; pleural sulcus crenulated ( Fig. 2C ); middle lobe of mesoscutum with setae; notauli incomplete, not impressed on mesoscutal disc ( Fig. 2D ); medio-posterior depression deep and dropletshaped, almost extending to middle of mesoscutum ( Fig. 2D ); surface of propodeum densely reticulate-rugose, areola absent posteriorly ( Fig. 2E ); pterostigma wide, 3.8 × longer than its maximum width ( Fig. 2A ); hind coxa smooth ( Fig. 2N ); length of first tergite 1.3 × its apical width, its surface longitudinally striate and dorsal carinae separate posteriorly ( Fig. 2E ); setose part of ovipositor sheath 0.35 × as long as fore wing (total visible sheath 0.4 times), and 1.2 × as long as hind tibia ( Fig. 2H ); metasoma except first tergite dark brown; legs (except dark brown apical part of hind tibia and hind tarsus) yellowish-brown ( Fig. 1).

Description. Holotype, ♀, length of body 3.4 mm, of fore wing 3.8 mm.

Head. Transverse, width of head 1.9 × its lateral length, and 1.6 × wider than mesoscutum ( Fig. 2I ); antenna with 34 antennomere, third antennomere (including annellus) 1.3 × longer than fourth segment, length of third and fourth antennomere 4.0 and 4.0 × their width, respectively ( Fig. 2G ); length of maxillary palp twice height of head ( Fig. 2K ); eye in dorsal view 1.2 × as long as temple ( Fig. 2I ); eye in lateral view 1.1 × higher than wide ( Fig. 2K ); frons smooth ( Fig. 2I ); vertex and temple smooth ( Fig. 2I ); OOL:diameter of ocellus:POL= 11:3:3; face smooth, twice wider than high, rather convex medially and with a longitudinal ridge ( Fig. 2J ); clypeus small, semi-elliptical and smooth ( Fig. 2J ); mandible enlarged apically, dorsal tooth enlarged and lobe-shaped ( Fig. 2L ), ventral tooth medium-sized and lobe-shaped ( Fig. 2M ), middle tooth curved and acute, with no incision between first and second tooth ( Fig. 2L ), medial length of mandible 1.3 × its maximum width.

Mesosoma. Length of mesosoma 1.4 × its height ( Fig. 2C ); pronope absent ( Fig. 2I ); medio-anteriorly pronotum crenulate, remainder of pronotum smooth; epicnemial area crenulated ( Fig. 2C ); precoxal sulcus widely crenulate, reaching middle coxa and anterior edge of epicnemial area ( Fig. 2C ); pleural sulcus crenulated ( Fig. 2C ); episternal scrobe small and deep; metapleuron reticulate-rugose ventrally, remainder smooth ( Fig. 2C ); mesoscutum with setae present at middle lobe ( Fig. 2D ); notauli incomplete, not impressed on mesoscutal disc ( Fig. 2D ); medio-posterior depression deep and droplet-shaped, almost extending to middle of mesoscutum, scutellar sulcus deep, with one longitudinal carina and some rugae, sulcus 3.0 × wider than its maximum length; scutellum smooth ( Fig. 2D ); surface of propodeum densely reticulate-rugose, areola absent posteriorly ( Fig. 2E ).

Wings ( Figs 2A–B ). Pterostigma wide, 3.8 × longer than its maximum width. r:3-SR:SR1 = 5:18:55; 1-SR+M nearly straight; SR1 straight; r 0.4 × as long as width of pterostigma; cu-a postfurcal; 1-CU1:2-CU1 = 3: 20; 3-CU1 as long as CU1b; 2-SR:3-SR:r-m = 5:4:3; m-cu interstitial, converging to 1-M posteriorly; first subdiscal cell 2.5 × as long as wide; M+CU1 largely unsclerotized. Hind wing: M+CU: 1-M: 1r-m = 20:15:8; m-cu interstitial.

Legs. Hind coxa smooth, without ventro-basal tubercle; tarsal claws slender, longer than arolium ( Fig. 2N ); length of femur, tibia and basitarsus of hind leg 4.6, 10.0 and 6.7 × their width, respectively; apical appendages of hind tarsal segments absent, segments ventrally with dense bristles ( Fig. 2N ).

Metasoma. Length of first tergite 1.3 × its apical width, its surface longitudinally striate, its dorsal carinae remain separated medially ( Fig. 2E ); dorsope distinct; convexity of upper valve of ovipositor steep basally ( Fig. 2H ); setose part of ovipositor sheath 0.35 × as long as fore wing (total visible sheath 0.4 times), and 1.2 × as long as hind tibia ( Fig. 2H ).

Colour. Black ( Fig. 1); two basal antennomere of antenna, mandible brownish yellow; palpi yellow; metasoma except first tergite dark brown; legs (except dark brown apical part of hind tibia and hind tarsus) yellowish brown; pterostigma and veins light brown; wing membrane hyaline.

Variation. Antennal segments of ♀ 34(1) or 35 (1).

Comparative diagnosis. This species is similar to A. incongrua Nees , but differs by having a wider face (twice wider than high versus 1.5–1.6 × in A. incongrua ); length of third antennal segment 4 × its width (versus 5 times); vein m-cu of fore wing interstitial (versus antefurcal); first tergite of metasoma 1.3 × as long as its apical width (versus 1.5 times); distance between base of pterostigma and vein r 4.6 × longer than vein r (versus 6.5 times).

Etymology. Named “ hebeiensis ” because of the type locality of the holotype is situated in Hebei province.

Figures

FIGURE 2. Alysia hebeiensis sp. n., ♀, holotype. A, fore wing; B, hind wing; C, mesosoma, lateral aspect; D, mesosoma, dorsal aspect; E, propodeum, first and second metasomal tergites, dorsal aspect; F, propodeum and metasoma, dorsal aspect; G, basal segments of antenna, lateral aspect; H, ovipositor and ovipositor sheath, lateral aspect; I, head, dorsal aspect; J, head, anterior aspect; K, head, lateral aspect; L, mandible, full view on first and second teeth; M, mandible, full view on third tooth; N, hind leg, lateral aspect.