Subject: Black fly, yellow stripe on head
Geographic location of the bug: Westfield, MA, USA
Time: 01:47 PM EDT
Your letter to the bugman: We have a hybrid hydrangea that blooms through July. Some days there are many dozens of insects enjoying the blooms. I cannot identify this one.
How you want your letter signed: Steveb
This is one of the parasitoid Tachinid Flies in the genus Trichopoda which are known as the Featherlegged Flies, and it is probably Trichopoda lanipes which is pictured on BugGuide. According to BugGuide, it preys on Leaf Footed Bugs in the family Coreidae.