Tracheen im imaginalen Dipterenflügel.

Abstract

It is sometimes stated in German entomological publications that cross veubs are not hollow and thus cannot contein tracheae or nerves; the wings of the dipterous imagines are said to be entirely without tracheae. Studies on the wings of several dipterous species and the evaluation of a paper by Arnold on the blood circulation in insect wings have shown that the wings of the Diptera contain tracheae and that the cross veins are hollow.