In today's edition of The History of the Kings of Britain (from the moment when Utherpendragon, Arthur's future father, sees Igerna
for the first time to the moment when she becomes his wife and two children are born to them, Arthur and Anna) this story takes up some eighty lines (Paragraphs 137-138).
The leafhopper genus, Igerna, which belongs to the tribe Agalliini of the subfamily Megophthalminae (Hemiptera, Cicadellidae), was originally described and established in the family, Tettigoniidae, by Kirkaldy (1903) with Pachynus bimaculicollis Stal, 1855 as its type species.
In the present paper, a 15th species, Igerna tenuicaula Li, Dai & Li sp.
Igerna can be distinguished from other taxa of Agalliini by the following combined characteristics: forewings with 3 anteapical cells and 4 apical cells, claval veins clearly separate; face rather convex and polished; male pygofer usually armed with tooth-like process or caudal margin presented as a simple spine-like process or elongate dorsal lobe; and male genitalia symmetrical, less robust.
While the deception is portrayed as a necessary means to provide for the birth of King Arthur, Merlin's pandering to King Uther's adulterous longings and his deceit of the virtuous Duchess Igerna point to the ambiguous relationship of Merlin to good and evil which is to characterize numerous subsequent depictions.
Although Robert's narrator insists that Merlin is the instrument of God, the wizard's dubious dealings in helping Uther to have an adulterous relationship with Igerna and, later, to deceive her and take away her son, suggest the ambiguity that haunts this figure.