Review of the Nearctic species of Leiophron and Peristenus (Hymenoptera Braconidae: Euphorinae) parasitizing Lygus (Hemiptera: Miridae: Mirini:) Author Goulet, Henri Author Mason, Peter G. text Zootaxa 2006 2006-09-28 1323 1 1 118 https://biotaxa.org/Zootaxa/article/view/zootaxa.1323.1.1 journal article 10.11646/zootaxa.1323.1.1 1175­5334 5071178 071E8D92-514B-4E2B-9F3F-E085CACA976A Peristenus Foerster Diagnosis: Head with medial carina between antennal socket and median ocellus ( Fig. 79 ). Metasomal tergum 2 sharply folded above spiracle, separating tergum into medio­ and laterotergites (the fold caused by break in the cuticle not only by a change in cuticle thickness) ( Figs. 4–9 , 77, 78 ). Hind wing subbasal cell large: vein 1M 0.9–1.7 times as long as vein cu­a ( Fig. 66 ). The following characters apply to specimens of almost all species. Metasomal tergum 1 with lateral margins meeting ventrally in basal 0.1–0.5 ( Fig. 70 ). Fore wing with radial cell more than 0.5 times maximum width of stigma ( Figs. 52, 57–63 ), and wing densely pubescent ( Figs. 52, 54 ). The occipital carina development mentioned in Shaw (1997) is variable and is not used further. This is a large worldwide genus. All reared specimens are from Miridae . Peristenus digoneutis group. Adults show a wide range of colour patterns, but all have the occipital carina widely interrupted dorsally (this character may be hidden in some specimens with the head inclined upward) ( Fig. 32 ). The three included species, P. digoneutis , P. relictus (Ruthe) and P. rubricollis (Thomson) , were intentionally introduced and established for biological control of Lygus and Adelphocoris plant bugs.