Mahinda Krombein

Kimsey, Lynn S., Mita, Toshiharu & Pham, Hong Thai, 2016, New species of the genus Mahinda Krombein, 1983 (Hymenoptera, Chrysididae, Amiseginae), ZooKeys 551, pp. 145-154 : 146-147

Taxon classification Animalia Hymenoptera Chrysididae

Genus Mahinda Krombein

Mahinda Krombein, 1983:28. Type: Mahinda saltator Krombein, 1983:29. Monobasic and original designation

Diagnosis.

Female Mahinda are brachypterous with the wings reduced to small pads, unlike female Atoposega , which are fully winged. They have the lateral propodeal angles sharp and conical, or spine-like and resemble females of Atoposega and Exopapua . They differ from female Exopapua in having a strongly convex pronotum, short metanotum, lack an omaulus and have a gradually sloping propodeum. Mahinda females differ from those of Atoposega in the hindcoxa with one or no dorsal longitudinal carinae (two in Atoposega ), mesopleuron with a narrow, parallel-sided ventromedial longitudinal groove (anteriorly carinate and U-shaped in Atoposega ). In addition Mahinda females have two sharp submedial angles above the posterior propodeal declivity, which do not occur in Atoposega . Male Mahinda have the wings are fully developed and the lateral propodeal angles are not spine-like, but short and conical. Other diagnostic features include the lack of an occipital carina, no omaulus or scrobal sulcus on the mesopleuron, and a long slender stigma + R1. Both sexes have a well-developed malar sulcus.

Description.

Head: without occipital carina; eyes covered with short setulae (males) or setulae minute (females); vertical malar sulcus present; propleuron with angulate lateral ridge; scapal basin densely cross-ridged; male flagellum elongate, filiform and cylindrical; female flagellum short and fusiform, flattened on one surface. Mesosoma: pronotum subequal in length to scutum, with short posteromedial groove and pit before lateral lobe; scutum with faint parapsides and well-developed notauli; mesopleuron with (females) or without omaulus (males), without scrobal sulcus, ventromedially flattened with groove and associated U-shaped, carina edged pit (males), convex with simple sulcus or line (females); male fully winged, forewing Rs extended by dark streak in abrupt angle, medial vein arising before cu-a, R1 not clearly indicated, stigma greatly elongate and slender; female strongly brachypterous, forewing pad with several visible veins; metanotum subequal in length to scutellum along midline, with punctate medial enclosure; propodeum with long acute lateral angles in females or short, obtuse angles in males, and abruptly declivous posterior surface; hindcoxa with one (male) or without dorsobasal carina (female); tarsal claw with large medial and small subbasal teeth. Metasoma: integument dull, and densely shagreened, or highly polished and impunctate, vestiture short and decumbent. Sternum I produced into large basal keel.

Distribution

(Fig. 2). Mahinda occurs in Sri Lanka, Vietnam and on the islands of Borneo and Sulawesi. Specimens are rare in collections.