(portrait of Nebiros from Le veritable dragon rouge, 1822)
Nebiros is one of the lower-ranking demons of hell. His portrait in the Red Dragon combines the body of a caterpillar with the head of a child. It is accompanied by the image of a leaf, which I have not shown above. This suggests that Nebiros may have some power over insect infestations.
A. E. Waite linked the image of Nebiros with Phul, the Olympic spirit of Monday and the Moon -- see The Book of Ceremonial Magic, plate 2, page 37.