Biology and immature stages of snail-killing flies belonging to the genus Tetanocera (Diptera: Sciomyzidae). V. Biology of three additional species having larvae that prey on aquatic pulmonate snails

摘要

Information is presented on the distribution, life histories, and larval feeding habits of three species of Tetanocera Duméril (T. bergi Steyskal, T. plumosa Loew, T. stricklandi Steyskal) that prey as larvae on pulmonate aquatic snails. Tetanocera bergi is widely distributed in the western United States and Canadian provinces, T. stricklandi is known only from Alberta, and T. plumosa has a transcontinental distribution. Larvae of all three species are general feeders and consume several taxa of aquatic snails.