There are at least two bands using the name Necrophagia:
1) A death metal band from Ohio
2) A thrash band from Los Angeles
1) Necrophagia is an american death metal band assembled in Wellsville, Ohio in 1983. They were one of the first death metal bands and were a popular group in the underground "tape trading" scene of the early-to-mid-1980s.
Featuring hard-driving metal and growling vocals, Necrophagia became a pioneer in the fledgling extreme metal genre. Their first full-length album, Season of the Dead, was recorded and released in 1987.
The band then split up due to musical differences, and lay dormant until 1997 when frontman Killjoy reformed the band with then Pantera frontman Phil Anselmo (under the pseudonym Anton Crowley) on guitars, Wayne Fabra on drums and Dustin Havnen on bass. This lineup released the album Holocausto de la Morte and the EP Black Blood Vomitorium. Havnen was then replaced by Jared Faulk, with Gorelord mainman Frediablo also joining as a second guitarist and Opal Enthroned (then Anselmo's wife) joining the band on keyboards. This line up released the Cannibal Holocaust EP in 2001 before splitting up leaving Killjoy & Frediablo as the only members for a short time.
In 2002 Killjoy announced the new Necrophagia line-up. Joining him and Frediablo would be Frediablos brother Fug on guitar, Iscariah (formerly of Immortal) on bass, Titta Tanni on drums and Mirai Kawashima of Japanese avant-garde black metal band Sigh on keyboards. This proved to be the most productive time for Necrophagia, with all members concentrating on the band rather than treating it as a side project. They released the albums The Divine Art of Torture and Harvest Ritual Vol. 1, as well as the Goblins Be Thine EP.
On June 6, 2006 Necrophagia released Slit Wrists And Casket Rot, a live album from their "Harvesting the Dead" tour.
On 22 December 2007 Necrophagia announced that Death Trip 69, will be released before Summer 2008, followed by a major tour, but the release of the album has been delayed. The exact release date is yet unknown but according to the band it will be out in 2010. Death Trip 69 will feature several guest appearances, including lead guitar parts by Mick Thomson from Slipknot. Opal Enthroned rejoined the band on 5 March 2008. Recently, Boris Randall has been announced as the new guitarist for the band. He will be a part of Deathtrip 69, scheduled to be released on October 31st, current year. Some of the song titles have been revealed, and they are as it follows:
"Suffering Comes in Sixes" "Reborn Through Blackmass" "Celluliod Screams" "Bleeding Eyes of the Eternally Damned"
2) Necrophagia was a death/thrash band from the LA area in the mid/late 80s. They released at least one demo, and one EP on Wild Rags before calling it a day. The band Nekroholocaust is a direct continuation of Necrophagia, with the same members, and even some of the same songs rearranged and played in a slightly more aggressive style. Nekroholocaust's In Memories of Fire was recorded in 1988 as a Necrophagia release, but due to internal disagreements never saw the light of day until 2005 when it was released using the new name by former Necrophagia member Jerry Battle.