Tetrastichus setifer Thomson, 1878

Hansson, Christer & Schmidt, Stefan, 2020, A revision of European species of the genus Tetrastichus Haliday (Hymenoptera: Eulophidae) using integrative taxonomy, Biodiversity Data Journal 8, pp. 59177-59177 : 59177

Tetrastichus setifer Thomson, 1878

Tetrastichus setifer Thomson 1878:283. Lectotype ♀ in MZLU, designated by Graham 1961:39, examined (Fig. 88). Transferred to Aprostocetus by Graham 1961:39 and back to Tetrastichus by Domenichini 1966:91.

Description

Female see Graham (1991).

MALE. Body length 1.9 mm. Head. Width/length in dorsal view 2.6, width/length in frontal view 1.3, eye height/malar space 1.2, mouth width/malar space 1.6, widths head/mesosoma 1.0. Antenna. F1-F4 with basal whorls of setae, reaching to but not beyond apex of corresponding flagellomere, scape length/eye height 1.1, scape length/width 3.0, ventral plaque placed in central part of scape, lengths ventral plaque/scape 0.8, pedicel+flagellum length/mesosoma width 1.4, length/width F1, F2, F3, F4 1.5, 1.7, 1.8,1.6, clava length/width 4.5, lengths pedicel/F1 0.9, lengths F1/F2 0.9, F1/F3 0.9, F1/F4 1.0, lengths F1, F2, F3, F4/clava 0.4, 0.4, 0.4, 0.4.

Colour. Body with metallic blue tinges, entire antenna dark brown, tegulae dark brown, wing venation pale brown, coxae concolorous with body, trochanters and femora dark brown, tibiae yellowish-brown, tarsi yellowish-brown with T4 brown.

Diagnosis

Ovipositor retracted and does not reach apex of Gt7; cerci placed laterally; colour dull compared to other species in this group; spine of antennal claval long, 0.5 × C3; mouth opening 1.3-1.4 × malar space.

Distribution

(Former) Czechoslovakia, France, (former) Yugoslavia ( Graham 1991) and Sweden ( Thomson 1878).

Ecology

Host

Lilioceris lilii (Scopoli) ( Gold et al. 2001) and L. tibialis (Villa) ( Kenis et al. 2002) ( Coleoptera : Chrysomelidae ).

Material examined

Type material: lectotype ♀ of T. setifer (MZLU, type no. 4868:1). Additional material (27♀ 5♂): France 2♀ (GD); Sweden 25♀ 5♂ ex Lilioceris lilii (MZLU, NHM).