By William T. Horton, 1907.  The caption reads, "They make their tongues as sharp as a serpent's; the poison of vipers is on their lips. —The Psalm"

From an 1863 issue of Fun magazine.

From an 1865 issue of Fun magazine.  This should also be of interest: How to Believe in Your Elf.

Here's a mirror imp from Judy, Or The London Serio-Comic Journal, 1875.

From Jugend, 1897.

"And these are the little things who assist him in carrying out his bad intentions."  From Judy, Or The London Serio-Comic Journal, 1879.  This should also be of interest: How to Believe in Your Elf.

Click to reveal the photo that inspired the painting.

"We might say a painting is a world; a photograph is of the world" (Stanley Cavell, Philosophy's Recounting of the Ordinary, 1999).

"A horror began to settle down upon him," from Cassell's, 1896.

"A scarlet company—devils, demons, witches."  From Pearson's, 1897.

Here's a precursor to the steady flow of demonic imagery on Tumblr.  From Jugend, 1897.

Mark Pahlow, founder of Archie McPhee, writes: "Thanks for your hard work of unearthing all the great material you post.  You are a saint, albeit from the netherworld."

From Heinrich Oraeus's Viridarium Hieroglyphico-Morale, 1619.   Speaking of which, what exactly are a snowball's chances in hell?  See A Snowball's Chance in Hell.

"Then all the spirits that swell in darkness shall obey the wearer," from "The Mystery of Precious Stones" in Cassell's, 1896.

Industrial waste used to be acknowledged with demon orifices.  From Jugend, 1896.