Bitru

Bitru: Otherwise called Sytry, a great Prince of Hell, according to the demonographer Wierius.  He appeared in the form of a leopard with the wings of a griffin.  But when he adopted a human appearance for the nonce it was invariably one of great beauty.  It is he who awakes lust in the human heart.  Seventy legions obey his commands.  (b)

Sytry, a great prince with the head of a leopard and the wings of a griffin.  He stimulates passion between the sexes, in part by encouraging women to display themselves naked. (c)

Sitri, alias Bitru, is a great prince, appeering with the face of a leopard, and having wings as a griffen: when he taketh humane shape, he is verie beautiful, he inflameth a man with a womans love, and also stirreth up women to love men, being commanded he willinglie deteineth secrets of women, laughing at them and mocking them, to make them luxuriouslie naked, and there obeie him sixtie legions. (g)

SITRI. - The Twelfth Spirit is Sitri. He is a Great Prince and appeareth at first with a Leopard’s head and the Wings of a Gryphon, but after the command of the Master of the Exorcism he putteth on Human shape, and that very beautiful. He enflameth men with Women’s love, and Women with Men’s love; and causeth them also to show themselves naked if it be desired. He governeth 60 Legions of Spirits. His Seal is this, to be worn as a Lamen before thee, etc. (h)

The Names of Some of the Good and Bad Spirits Solomon Made Use of which are mentioned in Enoch's Seven Tables, with a true account of their shapes, powers, government and effects, with their several seigniories* and degrees.

58 SITRI, is a great Prince appearing with the face of a Leopard having wings as a Griffin.  When he taketh human shape he is very beautiful, he inflameth a man with woman's love, and stirreth up women to love men, being commanded he willingly destroyeth secrets of women laughing at them and mocking them to make them luxuriously naked.  And there obey him sixty Legions.  (s)

*this is the spelling in the text

Resource List - all entries are taken verbatim from the original source:

(b) "Encyclopaedia of Occultism" by Lewis Spence. ©1959

(c) "Fallen Angels...and Spirits of the Dark" by Robert Masello ©1994. 

(h) The Lesser Key of Solomon.  GOETIA.  Compiled and Translated By S.L. "MacGregor" Mathers.  Editing and Additional Material By Aleister Crowley

(g) Pseudomonarchia daemonum - Johann Wier (1583)

(s) "A Treatise on Angel Magic, Being a Complete Transcription of Ms. Harley 6482 in the British Library."  Edited & Introduced by Adam McLean.  Phanes Press.  ©1990.  First published in 1949.