On Jun 30, 2009, sallyg from Anne Arundel,, MD (Zone 7b) wrote:
Quoted from the ID forum thread
:"This is a 'good guy' (or gal, as the case may be); it is Trichopoda pennipes, a fly in the family Tachinidae that parasitizes squash bugs. I often see them among our squash plants. See http://tinyurl.com/lfr726 for images and more information."
Fly lays eggs on large larva and adults of Squash bugs. Eggs will be on underneath edge of bug abdomen.