Tachinidae: Sturmia bella parasitizes Polygonia c-album скачать в хорошем качестве

Tachinidae: Sturmia bella parasitizes Polygonia c-album

Sturmia bella Meigen, 1824, is a parasitoid fly belonging to the family Tachindae. It is an internal parasitoid, especially of vanessine nymphalid butterflies. The female’s lays minute hard-shelled, dark-brown eggs on the leaves where caterpillars feed. While feeding, the caterpillars will eat these eggs and the tachinid larva will hatch in the gut and develop inside the caterpillar and will not kill its host until the latter has pupated. In this video the maggot egresses, six day after the caterpillar has pupated, through the wing case and produces a proteinaceous strand as an ‘escape line’ to gently descend to the soil to pupariate. Some hours later, a second maggot vacated from the chrysalis. From a second chrysalis of the Comma, also two maggots egressed from the wing case. After a fortnight, Sturmia bella emerges, wings folded. The fly will move to a higher position to unfold its wings by pumping hemolymph through its veins. Once the wings are fully unfolded, the hemolymph is withdrawn from the veins. The wings will get transparent and the veins turn dark. Identification Sturmia bella Hans-Peter Tschorsnig PDF - Sturmia bella Meigen (Dipt.: Tachinidae) and the strand that is not silk http://www.filming-varwild.com/articl... For more information visit our website Filming VarWild http://www.filming-varwild.com/a- c-album.html    • The Comma (Polygonia c-album L., 1858)   http://www.filming-varwild.com