Abstract

<jats:p> Haemoproteus canachites n. sp. is described from stained blood smears from a spruce grouse (Canachites canadensis L.). The sporogonic cycle in Culicoides sphagnumensis Williams is described and illustrated. Infection was produced in ruffed grouse (Bonasa umbellus L.) injected with sporozoites from biting midges in which sporogony had taken place. The cycle is similar to that for Haemoproteus nettionis (Johnson and Cleland) in Culicoides. </jats:p>