white (Colinus virginianus) (Stabler and Kitzmiller, 1976, loc. cit.); scaled quail (Callipepla squamata) (Herman, in Campbell and Lee, 1953, loc. cit.); Gambel's quail (Callipepla gambelii) (Herman, In Campbell and Lee, 1953, loc. cit.; Stabler and Kitzmiller, 1976, loc. cit.); California quail (Callipepla californica) (Herman, In Campbell and Lee, 1953, loc. cit.); and mountain quail (Oreortyx pictus) (Stabler and Kitzmiller, 1976, loc. cit.). The tinamou, gray partridge, sage grouse, greater prairie-chickens, northern bobwhite, and mountain quail were from Colorado; the blue grouse was from Montana; the lesser prairiechicken from New Mexico and Texas; the sharptailed grouse from North Dakota and Colorado; the scaled quail were from New Mexico; the Gambel's quail from New Mexico, California, and Colorado; and the California quail from California. Plasmodium pedioecetii has thus far not been associated with morbidity. By comparison, 1 apparently healthy prairie-chicken from Texas presented a parasitemia of 189 parasitized red cells per 1,000 examined. Of 500 parasitized cells, 426 contained 1 parasite, 67 had 2, 5 had 3, and 1 each contained 4 and 5 plasmodia, respectively, or a total of 584 plasmodia in the 500 cells (Stabler, 1978, loc. cit.). This work was supported in part by the Nongame Research Program, Project N-l-R, of the Colorado Division of Wildlife. We acknowledge the encouragement of C. E. Braun and the reviews of R. W. Hoffman and M. R. Szymczak.