Golden Beetle (Book3, pages 180 and 274-276)(Book10, page 31)
An insect, roughly the size of a rhinoceros, which lives in the caverns below the Nest of the Priest-Kings in the Sardar Mountains; its prey are the Priest-Kings themselves. It releases an aroma and exudate which is so compelling to the Priest_King that to die by the method is referred to as succumbing to the "Pleasures of the Golden Beetle"

Hinti
Small, flea-like insects; unlike fleas, they are not parasites

Slime worm (Book3, page 186)
A long, slow, blind worm which inhabits the caverns below the Nest in the Sardar; scavenges the remains of the Golden Beetles kills

Sting flies or needle flies (Book24, page 161)
Originate in the delta, and similar places. It's sting is extremely painful, but it is usually not dangerous, unless inflicted in great numbers.

Zarlit (Book6, page 5)(Book24, page 160)
very large, about two feet long, with four large, translucent wings, with a span of about a yard. It has large, padlike feet on which, when it alights, it can rest on the water, or pick its way delicately across the surface and feeds on small insects. Most of them are purple. Their appearance is rather formidable and can give one a nasty turn in the delta, but happily, one soon learns they are harmless, at least to humans

Insects common also to Earth (Book13, page 313)
Ants, Beetles, Centipedes, Flies, Rock spider, Scorpions, Termites