Astymachus srilankae Noyes & Higashiura 2020, sp. nov.
Creators: name: Noyes, John S.
name: Higashiura, Yoshimitsu
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Encyrtidae
Astymachus
Astymachus srilankae

description: 9. Astymachus srilankae sp. nov.   
 (Figures 3i – m)   
 Diagnosis. Female. Length, including ovipositor, 1.18 – 1.68 mm (1.57 mm). Body generally yellow to very pale orange; dorsal part of inflexion of frontovertex margined brown, more widely so near eye; antenna generally pale orange, scape brown ventrally, clava with apex dusky; fore wing (Figure 3l) generally hyaline or extremely weakly infuscate with only a small, weakly infuscate area below junction of marginal and stigmal veins that just reaches to level of apex of stigmal vein and a very faint, elongate streak parallel to posterior margin between linea calva and base of wing; head (Figure 3i) about 1.9 – 2.0× (2.0×) as long as eye; palp formula 4 – 3; antenna (Figure 3j) with F1 – F5 subequal, F1 subquadrate, F2 – F5 strongly transverse, F6 transverse, largest; linear sensilla only on F6; clava 2-segmented, suture partial; scutellum with about 9 or 10 (10) setae; wings very nearly reaching apex of gaster, fore wing (Figure 3l) about 3.3× as long as broad and 3.5 3.7 × (3.7×) as long as mid tibia; marginal vein (Figure 3m) not appearing to reach anterior wing margin and about 0.6× as long as stigmal vein; stigmal vein (Figure 3m) elongate, about 3.5× as long as depth of uncus; discal setae below apex of venation about one-half as long as distance between sockets or about 3× as long as diameter of socket; ovipositor about 2.7× mid tibia and 2.1 – 2.2× (2.1×) gonostylus. Male. Length 0.87 mm. Antenna (Figure 3k) with funicle segments subequal, subquadrate with F1 and F6 slightly larger, linear sensilla only on F6; aedeagus about 1.1× as long as mid tibia, about 13× as long as broad and slightly constricted about halfway between base of apodemes and becoming very slightly wider subapically.   
 Biology. A parasitoid of Aclerda takahashii (Hempel) (Hemiptera: Aclerdididae) on sugarcane. The record from Sacharicoccus sacchari (Cockerell) (Hemiptera: Pseudococcidae) below is probably erroneous.   
 Distribution. Sri Lanka.   
 Material examined   
 Holotype ♀. SRI LANKA, Uda Walawe and Sevangala, ex Aclerda takahashii on sugarcane, 1/97/02, January 1997, IIE 23634. Paratypes: SRI LANKA, 1♀, 1♂, Uda Walawe and Sevangala, ex Aclerda takahashii on sugarcane, No 1/97/01, March 1997; 4♀, same data as holotype; 13♀, Uda Walawe and Sevangala, ex Aclerda takahashii on sugarcane, January 1997, IIE 23634. Holotype and paratypes in BMNH.   
 Non-type material. SRI LANKA (as Ceylon), 5♀, 4♂, Peradeniya, ex Saccaricoccus scchari (H.E. Fernando) (USNM).   
 Comments. Females of Astymachus srilankae can be distinguished by the brown anterior margin to the frontovertex, relatively long head and virtually naked, hyaline fore wing with a relatively long stigmal vein.
description: Published as part of Noyes, John S. & Higashiura, Yoshimitsu, 2020, The species of Astymachus Howard (Hymenoptera: Encyrtidae) ı potentially important parasitoids of Aclerdidae (Hemiptera: Coccoidea) associated with grasses (Poaceae) ı with descriptions of three new species, pp. 665-679 in Journal of Natural History 54 (9) on pages 677-678, DOI: 10.1080/00222933.2020.1747654, http://zenodo.org/record/4290415