The genus Aivalykus Nixon, 1938 (Hymenoptera: Braconidae: Doryctinae) with description of a new species from India and Arabian Peninsula Author Ranjith, A. P. Insect Ecology and Ethology Laboratory, Department of Zoology, University of Calicut, Kerala, Pin: 673635, India. Author Belokobylskij, Sergey A. Zoological Institute, Russian Academy of Sciences, St Petersburg 199034, Russia. & Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, Warsaw, Poland. Author Sureshan, P. M. Zoological Survey of India, Western Ghat Regional Centre, Kozhikode, Kerala, Pin: 673006, India. Author Nasser, M. 0000-0002-6460-1839 Insect Ecology and Ethology Laboratory, Department of Zoology, University of Calicut, Kerala, Pin: 673635, India. & drnasher @ gmail. com; https: // orcid. org / 0000 - 0002 - 6460 - 1839 drnasher@gmail.com text Zootaxa 2020 2020-08-05 4822 2 269 276 journal article 8742 10.11646/zootaxa.4822.2.8 9701ad89-9445-42dd-a0f3-7876ff2c35e2 1175-5326 4401547 C8EC3407-5A03-4E8A-A438-AE7D25197DBD Key to the World species of the genus Aivalykus 1. Second metasomal tergite of female entirely smooth; antenna with 14–21 antennomeres. [Brachial (subdiscal) cell closed distinctly before recurrent vein (m-cu)]...................................................................... 2 - Second metasomal tergite of female striate at least on basal one-third or medially, sometimes entirely; antenna with 25–35 antennomeres........................................................................................ 7 2. Vertex entirely smooth................................................................................. 3 - Vertex distinctly transversely striate or micro-aciculate....................................................... 4 3. Mesoscutum completely smooth; first metasomal tergite smooth laterally, distinctly striate medially; antenna with more than 20 antennomeres; head and mesosoma dark reddish brown, metasoma light reddish brown. Body larger, its length 3.3 mm . [ Fiji ]................................................................. A. levis Belokobylskij, Iqbal et Austin, 2004 - Mesoscutum finely coriaceous; first metasomal tergite entirely and weakly striate; antenna with 16 antennomeres; body entirely honey yellow. Body smaller, its length 1.0– 1.5 mm . [ Brazil ]................................. A. flavus ( Marsh, 1993 ) 4. Vertex micro-aciculate................................................................................. 5 - Vertex distinctly transverse striate........................................................................ 6 5. First tergite short, its length 0.80–0.85 × its apical width; prescutellar depression (scutal sulcus) with three longitudinal carinae. Body length 1.5–2.0 mm. [ India , UAE ]............................................... A. microaciculatus sp. nov. - First tergite long, its length 1.0–1.2 × its apical width; prescutellar depression (scutal sulcus) with single median longitudinal carina. Body length 2.0– 3.8 mm . [ China , Indonesia ( Java )]...................... A. nitidus Belokobylskij et Chen, 2002 6. Malar space about 0.5 × eye height; mesoscutal lobes shallowly punctuate; basolateral areas of propodeum weakly punctuate; nervulus (cu-a) interstitial. Body length 1.5–2.5 mm . [ USA ]............................... A. nearcticus Marsh, 1965 - Malar space about 0.35× eye height; mesoscutal lobes coriaceous; basolateral areas of propodeum coriaceous; nervulus (cu-a) distinctly postfurcal. Body length 2.5 mm . [ Costa Rica ]..................................... A. hansoni Marsh, 2002 7. Recurrent vein (m-cu) postfurcal or rarely interstitial to first radiomedial vein (2-SR); first metasomal tergite twice longer than its apical width; third metasomal tergite at least in basal half longitudinally striate. Female longer, body length 4.5–7.0 mm. [ India , Philippines ].................................................................. A. eclectes Nixon, 1938 - Recurrent vein (m-cu) more or less distinctly antefurcal to first radiomedial vein (2-SR); first metasomal tergite 1.0–1.4 × longer than its apical width; third metasomal tergite always smooth. Female shorter, body length 3.0–4.0 mm............... 8 8. Brachial (subdiscal) cell closed apically (almost) on level of recurrent vein (m-cu).................................. 9 - Brachial (subdiscal) cell closed apically distinctly before level of recurrent vein (m-cu)............................. 10 9. Antennae with 25–26 antennomeres; sternauli completely absent; second metasomal tergite striate only basally, sometimes striation almost absent. Body length 4.0– 4.5 mm . [ India ]................................... A. sperches Nixon, 1938 - Antennae with 29–30 antennomeres; sternauli present, but shallow; second metasomal tergite costate only medially. Body length 3.0–4.0 mm. [ Costa Rica ]...................................................... A. austrinus Marsh, 2002 10. Transverse diameter of eye about twice length of temple; first flagellar segment 0.8 × as long as second segment; radial vein (r) arising almost from middle of pterostigma; brachial (subdiscal) cell apically closed distinctly before recurrent vein (m-cu); length of first metasomal tergite almost equal to or slightly larger than its apical width; hind tibia with dense dorsal setae. Body length 2.8–3.8 (female) and 6.0–7.0 (male) mm. [ Ghana ].............................. A. endroedyyoungai Papp, 1993 - Transverse diameter of eye 1.6 × length of temple; first flagellar segment 0.6 × as long as second segment; radial vein (r) arising behind middle of pterostigma; brachial (subdiscal) cell apically closed weakly before recurrent vein (m-cu); length of first metasomal tergite 1.5 × its apical width; hind tibia with sparse dorsal setae. Body length 3.0 mm (female). [ China ]............................................................................. A. bouceki Belokobylskij et Chen, 2002