Baeus striatus Veenakumari, 2020

Kamalanathan, Veenakumari, Mohanraj, Prashanth, Samuel, D. K. & Reddy, M. Krishna, 2020, Revision of Indian species of Baeus Haliday (Hymenoptera: Platygastroidea: Scelionidae), Journal of Natural History 54 (13 - 14), pp. 813-917 : 894-896

Baeus striatus Veenakumari , sp. n. ( Figure 30 (a–d))

http://www.zoobank.org/ urn:lsid:zoobank.org:act:CB0717A8-C756-4975-B4FB-9CC16E014763

Holotype. Female; body length = 0.68 (0.65–0.71) mm; n = 4

Colour ( Figure 30 (a)). Head, mesoscutum and metasoma brownish black, except for paler mesoscutellum, propodeum and posterior tergites; hyperoccipital carina black; mesoscutellum with a yellow markings on posterior margin; antenna brown; legs brown with uneven patches of yellow and black.

Head ( Figure 30 (a–d)). Head as wide as high; IOS 0.52 (0.49–0.55)× width of head, and 1.32 (1.30–1.33)× eye length; eye (L: W = 10.7:9.7) touching hyperoccipital carina posteriorly; head height 1.86 (1.81–1.90)× eye length; POL>LOL in ratio of 13.2:7.8; lateral ocellus contiguous with orbit; distance from posterior margin of lateral ocellus to hyperoccipital carina 1.27 (1.25–1.29)× MOD; pilosity of moderate density, setae shorter than those on mesonotum and metasoma; interantennal process triangular, predominantly smooth with a rugose patch dorsally; length of central keel 0.43 (0.40–0.46)× distance from interantennal process to median ocellus; facial striae very long extending up to base of lower orbit; malar striae sparse; frons with semicircular striae on either side of central keel; upper frons and vertex imbricate; vertex dome shaped; gena predominantly smooth with sparse vertical striae basally, 6.43 (6.41–6.47) × as long as wide; anterior margin of gena in contact with 0.52 (0.50–0.55)× length of ventral margin of eye; length of A1 subequal to that of clava; length of A2 0.44 (0.41–0.46)× that of A1.

Mesosoma ( Figure 30 (a,b,d)). Mesoscutum and mesoscutellum 0.53 (0.49–0.58)× and 0.16 (0.15–0.18)× as long as wide, respectively; mesoscutum and mesoscutellum imbricate with smooth posterior margin; metascutellum not visible; propodeum smooth dorsally, 0.63 (0.60–0.67)× the length of mesoscutellum; pilosity of moderate density, setae of medium length; lateral pronotal area dorsally foveate, remainder smooth except for sparse weak transverse carinae postero-ventrally; postero-dorsal margin of lateral pronotal area with two short weak projections; ventral margin of lateral pronotal area extending as a blunt projection; transverse carinae on dorsal mesopleuron extend below the level of dorsal metapleuron, ventrally with a foveate-reticulate patch, remainder smooth; mesopleuron extending as a narrow, projection ventrally; mesopleural pit small; metapleuron smooth with weak foveae antero-ventrally beneath an oblique carina; posterior suture of metapleuron straight and curves abruptly dorsally towards mesopleuron meeting the posterior mesopleural suture; dorsal level of posterior metapleural suture ventral to level of antero-lateral margin of T 2; sculpturing of propodeum anterior to spiracle transversely carinate, region posterior to spiracle smooth with two short carinae at base; region ventral to spiracle with two oblique carinae branching distally into short carinae; remainder of lateral propodeum smooth with sparse transverse carinae antero-ventrally; propodeal spiracular opening tear-drop shaped.

Metasoma ( Figure 30 (a,b,d)). Metasoma as long as wide; pilosity sparse, setae of medium length; T 2 anteriorly imbricate and posteriorly smooth; remaining tergites smooth.

Material examined. Holotype: Female ( ICAR / NBAIR / P2867 ), INDIA: Karnataka: Bengaluru, Attur , 13 ° 05 ʹ 48 ʹ ’ N 77 ° 33 ʹ 59 ʹ ’E, 936 m, PFT, 26.XI.2013 ; Paratypes: 1 female ( ICAR / NBAIR / P2868 ), Tamil Nadu: Dindugul , Thandikudi, RCRS, 10 ° 18 ʹ 34 ʹ ’ N 77 ° 38 ʹ 34 ʹ ’E, 1305 m, YPT, 29 . XI .2016; 1 female ( ICAR / NBAIR / P2869 ), Karnataka: Bengaluru, Hebbal, National Bureau of Agricultural Insect Resources ( NBAIR), 13 ° 01 ʹ 38 ʹ ’ N 77 ° 35 ʹ 03 ʹ ’E, 927 m, YPT, 07 .X .2013; 1 female ( ICAR / NBAIR / P2870 ), same as holotype, YPT, 05 .IX .2011; 1 female ( ICAR / NBAIR / P2871 ), Karnataka: Tumkur, Kunigal , 13 ° 02 ʹ 01 ʹ ’ N 77 ° 03 ʹ 48 ʹ ’E, 784 m, SN, 19 .IX .2014; 2 females ( ICAR / NBAIR / P2872 , P2873 ), Tamil Nadu: Udagamandalam, IISWC, 11 ° 24 ʹ 00 ʹ ’ N 76 ° 40 ʹ 13 ʹ ’E, 2224 m, YPT, 06 . VI .2015; 1 female ( ICAR / NBAIR / P2874 ), Assam: Titabar, Regional Agricultural Research Station , 26 ° 29 ʹ 30 ʹ ’ N 94 ° 09 ʹ 56 ʹ ’E, 103 m, YPT, 25 .II .2017; 1 female ( ICAR / NBAIR / P2875 ), Assam: Dibrugarh , Krishi Vigyana Kendra ( KVK), 27 ° 47 ʹ 28 ʹ ’N 94 ° 91 ʹ 19 ʹ ’E, 109 m, YPT, 07 .XI .2014; 1 female ( ICAR / NBAIR / P2876 ), Uttar Pradesh: Mainpuri, Nagla Daudpur , 27 ° 05 ʹ 45 ʹ ’ N 79 ° 15 ʹ 43 ʹ ’E, 149 m, SN, 16 .IX .2007; 1 female ( ICAR / NBAIR / P2877 ), Great Nicobar: Campbell Bay , 7°00 ʹ 77 ʹ ’N 93°91 ʹ 47 ʹ ’E, 13 m, SN, 20 .III .2016.

Etymology. This species is named ‘striatus’ because of the fine striae present on frons. The name is treated as an adjective.

Diagnosis. B. striatus sp. n. is closer to B. pygmaeus sp. n. and the diagnosis is mentioned under the latter species.

Figures

Figure 30. Baeus striatus sp. n. (a) Habitus (colour); (b) Habitus; (c) Frons; (d) Habitus (lateral view).