ICAR - Insect

Neohydatothrips biconcavus Rachana

Nomenclature

Neohydatothrips biconcavus Rachana, 2021

Diagnosis

Female macroptera: Body bicoloured; head and pterothorax brown; pronotum yellow with blotch shaded; metanotum sharply pale at posterior third; abdominal segment I yellowish brown, II–IV brown, V–VI pale brown, VII brown except anterior 1/3, VIII–IX brown, X yellow with brown infusion; semicircular dark areas on tergites I–VI with anterior margin touching antecostal ridge on both sides; pale circular area on tergite VII with anterior margin touching antecostal ridge on both sides; sternites II–VI with circular dark patch on both sides. Fore wing brown with a pale sub-basal and feebly shaded distal third areas, basal ¾ of clavus brown; fore femora yellow, mid and hind femora brown, all tibiae and tarsi yellow. Antennae 8-segmented. Head without sculpture lines within ocellar triangle; occipital apodeme touching posterior margin of eyes; ocellar setae III close to fore ocellus on tangent between fore and hind ocelli; three pairs of postocular setae along posterior inner margin of eyes, pair I distinctly longer than others, sub-equal to ocellar setae III. Pronotum transversely reticulate without internal markings; blotch shaded brown, well defined having transverse striations with internal markings between the striae; deeply concave at anterior and posterior margins, weakly concave at lateral margins; one pair of long blotch posteroangular setae; a pair of blotch posteromarginal setae, half the length of blotch posteroangular setae. Metanotum sculptured transversely anteromedially, longitudinally at each side, irregularly reticulate at middle; median setae behind anterior margin. Fore wing first vein with short gap in setal row near apex, second vein with 2 distal setae. Abdominal tergites I–II medially without marginal microtrichia; III–VI with complete marginal microtrichia, but extremely minute medially; VII with complete marginal microtrichia, but shorter medially; VIII with complete row of marginal microtrichia; tergite I with discal microtrichia between median campaniform sensilla and laterally, II with discal microtrichia laterally only, III–VIII with discal microtrichia laterally and extending medially near anterior margin; IX–X with no discal microtrichia; tergite IX with 2 pairs of mid-dorsal setae. Abdominal sternites without marginal microtrichia; anterior portion of sternite VII forming 2 protuberances, three pairs of posteromarginal setae arising in front of posterior margin; II–VI with discal microtrichia on lateral thirds.