In a collection of gomphids from Cameroon the following stages are described for the first time: Ictinogomphus fraseri Kimmins – female imago, egg and larva; Paragomphus abnormis (Karsch) – female imago and larva. The larvae of Microgomphus camerunensis Longfield and Phyllogomphus montanus Fraser are redescribed. An enigmatic gomphid larva with a remarkably long siphon is described and compared with a probably congeneric larva from Uganda. The collection included a Gomphidia that is to be described by R.M. Gambles as G. nigeriensis Gambles.