I appreciate your referencing the idea of insect magic and am willing to accept that the information may be rare... but all three of the examples you gave do not pan out in searches. Can you be any more forth right with useful accessible information.
Thank you.
RR.

Gu Medicine is a Chinese Medical theory that relates to specific Chong worm / parasite, conditions and treatments - sometimes refered to as invisible so maybe spirit...

Extensive searches on Li Shi Chen and various spellings of that name with Gu and insects show only his extensive listing of plants to deal with spirits, and no mention of insect spirits...

Kenneth Grant on Cult of Ku - refers to a snake but no mention of insects....

"A little known aspect of Spare, an aspect that links up with his friendship
with Thomas Burke,(20) reveals the fact that a curious Chinese occult society-
known as the Cult of the Ku- flourished in London in the nineteen-twenties.
Its headquarters may have been in Peking, Spare did not say, perhaps he did
not know; but its London offshoot was not in Limehouse as one might have
expected, but in Stockwell, not far from a studio-flat that Spare shared with
a friend. A secret session of the cult of the Ku was witnessed by Spare, who
seems to have been the only European ever to have gained admittance. He does,
in fact, seem to have been the only European apart from Burke who had so much
as heard of the Cult. Spare's experience is of exceptional interest by reason
of its close approximation to a form of dream-control into which he was
initiated many years earlier by Witch Paterson.

(20) 1886-1945.

The word Ku has several meanings in Chinese, but in this particular case it
denotes a peculiar form of sorcery involving elements which Spare had already
incorporated in his conception of the New Sexuality. The Adepts of Ku
worshipped a serpent goddess in the form of a woman dedicated to the Cult.
During an elaborate ritual she would become possessed, with the result that
she threw off, or emanated, multiple forms of the goddess as sentient shadows
endowed with all the charms possessed by her human representative. These
shadow-women, impelled by some subtle law of attraction, gravitated to one or
other of the devotees who sat in a drowsy condition around the entranced
priestess. Sexual congress with these shadows then occurred and it was the
beginning of a sinister form of dream-conrtol involving journeys and
encounters in infernal regions.

The Ku would seem to be a form of the Fire Snake exteriorized astrally as a
shadow-woman or succubus, congress with which enabled the devotee to reify his
'inherent dream'. She was known as the 'whore of hell' and her function was
analogous to that of the Scarlet Woman of Crowley's Cult, the Suvasini of the
Tantric Kaula Circle, and the Fiendess of the Cult of the Black Snake. The
Chinese Ku, or harlot of hell, is a shadowy embodiment of subconscious
desires(21) concentrated in the alluringly sensuous form of the Serpent of
Shadow Goddess."