The numbers I have for losses are
B-17 - 4,754
B-24 - 2,112
From the 8th Air Force Combat Losses site these should Only cover the aircraft that did not return. However these numbers dissagree with the AAF Stasticics which count all combat losses (Again according to the 8th page Non-returns only) of 5,548 both 17s and 24s. I have seen the B-17 number shown above several times.
Bottom line, Adlers numbers are as close as anybody's.
The 9th was Tacticle air Fighters and Medium bombers. The 8th was Heavy bombers and associated Fighter escort. I'm not aware of any crossovers ie. Medium bombers in the 8th or heavies in the 9th. They did have fighters from the 9th as escorts for the 8th though. Since the first Merlin P-51s were built as long range Tac. air and assigned to the 9th (354th FG), they were available to help the P-38s fairly early in the escort role.
the 9th lost no heaveys and 815 medium bombers.
I don't know about the 15th but I'll look.
wmaxt