A review of the Palaearctic blackfly subgenus Simulium (Rubzovia) with theemphasis on S. (R.) paraloutetense, a species confined to Gran Canaria Island (Diptera : Simuliidae)

The larval and pupal stages of Simulium (Rubzovia) paraloutetense Crosskey are described following their first discovery in a spring trickle in Gran C anaria Island where the species is endemic; data from the polytene chromoso mes of the larval silk glands are included. Subgeneric placement of the spe cies is revised in light of all the findings. A diagnosis for the subgenus Rubzovia, a discussion of its geographical distribution and habitat, and a key to the four known species are included.