Female. Body orange brown (Fig. 1a); antenna with F6 yellow or light brown. Vertex, scape, pronotum, coxae, femora and tibiae with short, blunt setae. Axilla with 3 or 4 foveae. Scutellum without a row of frenal foveae. Fore wing (Fig. 1c) with 2 brown spots (modified setae of types F and G on the basal spot and normal setae on the apical spot). Propodeum (Fig. 1b) with a medial groove extending from anterior margin to base of submedial carinae at posterior margin; propodeal submedial carinae very short, not reaching half length of propodeum. Ovipositor slightly exserted (Triapitsyn and Berezovskiy 2007).<br/>

China, Thailand (Triapitsyn and Berezovskiy 2007), India (Meghalaya) (new record).

Female (Fig. 2). Body and antenna dark brown to black, legs a little lighter (except coxae). Antenna with F1 very short, much shorter than pedicel or any other funicle segment; F2 longest, almost as long as pedicel; clava 2.2–2.5x as long as wide in lateral view, about as long as combined length of 4 preceding segments. Mesoscutum with distinct notauli; anterior part of propodeum strongly sculptured with an incomplete, often inconspicuous median longitudinal carina, posterior part of propodeum smooth. Fore wing 13–14x as long as wide, its blade slightly infumated basally and almost hyaline distally, with two rows of microtrichia along margins and many additional irregularly arranged microtrichia in distal half; longest marginal cilia 4.6–5.0x greatest width of the wing (Triapitsyn and Berezovskiy 2004).

Russia, Austria, Belgium, Bulgaria, Canada, Czech Republic, Denmark, England, Finland, France, Greece, Hungary, Italy, Japan, Krygyzstan, Mexico, Moldova, Morocco, Nepal, Netherlands, Republic of Korea, Romania, Serbia and Montenegro, Slovenia, Spain, Switzerland, Turkey, USA, Wales (Triapitsyn and Berezovskiy 2004​). India (Meghalaya) (new record).

Ocypus olens (Kieffer 1913, Kryger 1950​), Staphylinus sp. (Staphylinidae) (Viggiani 1973​).

Female (Fig. 3). Body yellow, except funicle segments, club, mesopleuron, propodeum and distal half (excluding tip) of metasoma brown; eyes red. Antenna with all funicle segments cylindrical, F5 and F6 more than 2x as long as wide, F4–F6 taken together clearly longer than club, club elongate elliptical, more than 3x as long as wide, without a distinct apical digit at the tip or with a very short one; its basal segment shorter than apical one. Mesosoma a little shorter than metasoma. Fore wing about 9x as long as wide, its longest marginal cilia about 1.9x its maximum width; discal cilia irregularly scattered over apical ¼ of wing blade, anterior longitudinal line of cilia beginning beyond end of venation; hind wing almost as long as forewing, with one and a half lines discal cilia; legs slender; ovipositor longer than body length, exserted part of ovipositor at least 1.3x metasomal length (Lin and Chiappini 1996).

China (Lin and Chiappini 1996​), India (Meghalaya) (new record).

Female (Fig. 4). Body strongly flattened dorsoventrally. Antenna 11-segmented, with 3-segmented clava; funicle segments submoniliform; F5 and clava with placoid sensilla. Forehead distinctly divided into ventral and dorsal halves, former with two curved trabeculae, which extend from clypeus to antennal scrobes. Mandibles small, toothless, apparently not movable (without articular processes); gnathal aperture small, ventral, removed from occipital border. Epicranial sutures joining posterior ones before anterior ocellus so as to form X-shaped figure. Pronotum large, completely divided longitudinally. Wings with narrow discal blade, sharply pointed distally. Legs short and stout; fore tibiae with strong spines on ventral surface; hind femora distinctly swollen and compressed. Abdomen broadly sessile, ovipositor protruding (Ogloblin 1946​).

Indonesia (Java) (Ogloblin 1946​). This constitutes the first record of this genus from India (Meghalaya).

Hosts: Eggs of Tettigonioidea, Saltatoria (P. onomarchicidum recorded from eggs of Onomarchus uninotatus) (Ogloblin 1946​).

Nominate form of A. aquilonaris with a characteristic reddish coloration more or less throughout dorsal side (Fig. 5a), antenna with F1, F6 and clava brown, F2-F5 generally white (Karnataka). The following variants recorded from different parts of India: head and mesosoma orange-red, metasoma dark brown, wing infuscate to a greater degree (Fig. 5b) (Tamil Nadu); head, mesosoma and metasoma deeper orange-reddish brown, antenna with F1 black, F2 white with slight infuscation, F3 pale brown, F4 black (Fig. 5c) (Arunachal Pradesh); dorsal side slightly darker reddish brown, antenna with F1 black, F2-F3 white, all the remaining segments black (Fig. 5d) (from Meghalaya).

Fairly widely distributed in India (Andhra Pradesh, Assam, Bihar, Delhi, Jammu & Kashmir, Jharkhand, Karnataka, Kerala, Tamil Nadu, Uttar Pradesh, Uttarakhand (Universal Chalcidoidea Database; Hayat 2006). Arunachal Pradesh and Meghalaya (new record).

Female (Fig. 6a, b) with very prominent antenna, head and mesosoma yellowish-orange with slight infuscation, scutellum with a characteristic, heart-shaped white patch and a bunch of elongate setae before apex (Fig. 6c), metasoma black with violet metallic reflections. Antenna (Fig. 6d) with scape yellow-orange, greatly expanded, pedicel yellow, funicle dark metallic violet and spindle-shaped, clava white, basally infuscate. Head hypognathous, in front view about as long as broad (Fig. 6c). Fore wing (Fig. 6b) infuscate.

The specimens examined by us agree with the illustrations provided by Hayat 2006 (see Figs. 1588-1591) except for the presence of the scutellar spot and the setal bunch on scutellum (lost in the holotype illustrated by Hayat). The original description indicates that C. ajmerensis is dorsally dark brown, but apparently its colour is quite variable.

Male (Fig. 6f) with head yellow with a median infuscate patch; antenna brownish with elongate whorls of setae; mesosoma dark brown except scutellum orange / yellowish with a basal yellowish-white patch as in female and a few short blackish setae near apex, lacking a setal bunch; metasoma dark brown; legs yellowish; wings more or less hyaline; scape 4.6x longer than wide; funicle segments cylindrical, subequal, each about twice as long as wide, clothed with long seta; clava entire, as long as preceding two funicle segments, base of clava with 8 scale like setae; fore wing hyaline, 2.5x as long as wide; marginal vein shorter than stigmal; postmarginal vein very short; linea calva interrupted by 4 or 5 lines of seta.

India: Rajasthan (Hayat 2006); new record for southern India (Karnataka).

Reared on Chorizococcus sorghi Williams (Sternorrhyncha: Pseudococcidae) infesting the roots of indeterminate plants (new host). Live adults look like small ants with vigorous wiggling of the antennae and can be readily distinguished by the characteristic antenna.

Female (Fig. 7a) orange-yellow, head yellow, occiput with two black patches one on either side of foramen behind each eye; antenna completely yellow; mesosoma yellow, pronotum with a wide black band across; mesoscutum with light bluish green reflection; wings hyaline; legs completely yellow; metasoma yellowish brown. Head in frontal view round, 3x as wide as frontovertex; posterior margin of mesoscutum angular and axillae produced anteriorly; fore wing 2.5x as long as wide; hind wing 4.2x as long as wide; mid-tibial spur a little longer than basitarsus. Ovipositor not exserted, more than one–quarter longer than metasoma.

Male (Fig. 7b) dorsally metallic green, antenna pale brown, side lobes of mesoscutum brownish, tegulae white, legs yellowish. Antennal scape about 3x as long as wide, flagellum clothed with whorls of setae; fore wing 2.6x as long as wide.

Reared on Aclerda sp. (Hemiptera: Coccoidea: Aclerdidae) on sugarcane, which constitutes a new host for this species. The specimens examined were collected from the states of Tamil Nadu and Karnataka on the same host.

Female (Fig. 8a, b) brachypterous, dull reddish-coppery brown with metallic reflections, mesoscutum (Fig. 8c) medially metallic green, metasoma with basal tergite having metallic green reflections; antenna pale brown, F1-F3 and clava black, F4-F6 white. Scutellum (Fig. 8c) apically acutely pointed and projecting over propodeum.

India: Originally described from Assam (Singh and Agarwal 1993; Hayat 2006). This constitutes the first record for southern India (Karnataka).

Female (Fig. 9a) robust in outline. Head orange with greenish eyes. Mesosoma reddish brown, scutellum slightly darker and medially infuscate. Legs yellowish-orange except tarsal apices darker. Antenna with scape flattened and expanded beneath, black; F1-4 brown, F5 and F6 white, clava dark brown to black. Frontovertex less than one-fifth of head width. Fore wing infuscate.

Male (Fig. 9b) with dark metallic green head, mesosoma yellowish-orange, metasoma blackish except lateral sides yellowish, legs pale yellow.

India: Assam (Hayat 2006​); new to southern India (Karnataka).

Reared from Pulvinaria polygonata Cockerell (Sternorrhyncha: Coccidae) (new host). Known hosts include Pulvinaria psidii Maskell on guava and undetermined coccids on lemon (Bhuiya 1998).

Female (Fig. 10). Body orange yellow with varying degrees of infuscation, head, abdomen, scutellum, pronotum and cephalic part of scutum at meson narrowly metallic; wings slightly yellowish throughout; scape concolorous; funicle and pedicel purple, club white; distal two funicle segments inclined to the paler; pedicel subequal to F1, F4 and F5 subequal, a little shorter, F6 still shorter, a little longer than wide; clava no wider than funicle and not quite half its length; cheeks about half the length of eyes; frons with some punctures; scutum finely scaly, scutellum glabrous; scutum with numerous obscure setigerous punctures, scutellum with only few; axillae separated for a short distance (Girault 1915).

Australia (Girault 1915). This is a new record for India (Meghalaya).