Melvoin’s death is the latest in a disheartening series of drug incidents. Stone Temple Pilots canceled their summer tour because of lead singer Scott Weiland’s addiction and court-ordered rehab. Shannon Hoon of Blind Melon died of an overdose in October. Sublime, Skinny Puppy and Hole have lost band members, purportedly to heroin, since 1994. Melvoin’s death stung the industry: his sister is Wendy Melvoin, half of Prince’s former backing duo Wendy & Lisa, and his father is a prominent jazz keyboardist. ““We called him Mr. Perfect,’’ said Stan Lee of the punk band the Dickies, with whom Melvoin played from 1990 to 1994. ““He was well cultured, he knew what kind of wine to drink with what fish. It’s a tragedy. It’s a drag.''