Last weekend I was lucky enough to observe a large meeting of Ichneumons (dozens at times), males and females, on a bug stressed elm tree in Prescott, AZ. Our local ‘bugman’ Carl Olson, associate Curator of the Dept. of entomology of the U of AZ, was so kind to identify them for me: Megarhyssa (I got that far with my German Insect book and your site) macrurus icerosticta (Michener). The males in the first pic are around 1", the females including the ovipositor up to 5". This all happened during an outdoor art show, so instead of selling my paintings, I found myself explaining over and over again the complex procreation of Ichneumon to lots of curious and fascinated folks.
Hi again Margarethe,
We are especially interested in the photo of the male Ichneumons since we almost always get requests to identify females.