I have been unable to find records of Melville White's flying career.  I can not say how long he was with 24 Squadron or whether he saw much action.  It was customary in service squadrons to train new pilots in action, doing their best to protect them until they had learned the skills needed to survive in a hostile sky.  In Melville's case, he may not have learned them.  This account of his death is reported by the airwar19141918 site - I do not know the original source: "Elsewhere the British were not so lucky losing 8 crew including Lieutenant Eric Arthur Barltrop and 2nd Lieutenant Fergus O’Sullivan from 22 Squadron in FE2b 6929 who collided with 2nd Lieutenant Melville Arthur White from 24 Squadron in DH2 7909. Both aircraft broke into pieces and crashed."

A further search finds what might have been an eye witness to the fatal collision.  The official record of the day show a Flight Sub-Lieutenant H S Kerby, of 3 Naval Squadron, witnessing: "Albatros Scout crashed Le Pave at 17:30/18:30; collided with another Albatros."

Australian R Gannon, on "theaerodrome" forum suggests: "As to the two seen to collide by FSL Kerby, this was well south of main action and the pair were flying side by side 2,000ft below; FSL Kerby reported that one, '...attempted to warn other by crossing over him. While doing this the 2 HA collided, the undercarriage of the upper crashing into wing of the lower - both machines went down crashing through the sky.' Despite him calling them Halberstadts I have a nagging suspicion he may have witnessed the collision of 22 Sqn's 6029 & 24 Sqn's 7909."

"The Katipo," the official journal of the P&T Department, described him in their obituary as "a young man of sterling character, who enjoyed the confidence of his superiors and the regard of his comrades and friends, all of whom will greatly regret his loss and the premature close of such a promising career."
Jeancourt Cemetery, France.  NZ War Graves Project photo.
Picton Cemetery.