Dubiraphia brunnescens (Fall, 1925). Among submerged willow roots along 

 rocky, wave-washed shore of Clear Lake, Lake Co., California. 



Dubiraphia giulianii (Van Dyke, 1949). Described from vegetation and 



rocks in the slow part of Russian River, California. Also reported 

 from eastern Oregon and southern Idaho. 



Dubiraphia quadrinotata (Say, 1825). On submerged roots, aquatic plants, 

 or other plant material (including rocks encrusted with algae) in 

 streams, ponds, and lakes throughout the eastern and central states 

 where it is often abundant, and in scattered streams westward to 

 New Mexico, Utah, and Idaho. Sensitive to chlorides; occurs in 

 recovery zone below sewage treatment plants. 



Dubiraphia vittata (Melsheimer, 1844). As above. 



Genus Elsianus Sharp, 1882 

 (This genus is currently under revision by Dr. Howard Hinton.) 



Elsianus moestus (Horn, 1870). Beneath rocks in Arizona streams. 

 Elsianus shoemakei Brown, 1971. In gravel or beneath rocks in San 



Felipe Creek in Del Rio, Texas and the upper Rio Salado in 



Coahuila, Mexico. 

 Elsianus texanus Schaeffer, 1911. In gravel or under rocks in streams 



with a high calcium content from Austin, Texas to southeastern New 



Mexico and southward into Mexico. 



Genus Gonielmis Sanderson, 1954 



Gonielmis dietriohi (Musgrave, 1933). On submerged wood and roots in 

 sandy streams from eastern Tennessee, Georgia, and Florida to 

 Mississippi. Tolerant of moderate organic enrichment, turbidity, 

 and siltation, but sensitive to paper mill effluent. 



Genus Heterelmis Sharp, 1882 

 (A new species is being described from the Santa Rita Mountains of 

 Arizona.) 



Eeterelmis glabra (Horn, 1870) . On submerged wood and trash and under 

 stones, especially in lowland streams from southern Nevada, 

 through Arizona, much of Mexico, and in the Rio Grande River along 

 the Texas border. 



Eeterelmis obesa Sharp, 1882. On submerged wood and under stones in 



cold, fast streams of Arizona and New Mexico, especially at higher 

 elevations. 



Eeterelmis vulnerata (LeConte, 1874) . On submerged wood and debris 

 and under rocks in streams of Oklahoma and Texas. 



Genus Eeterlimnius Hinton, 1935 



Eeterlimnius oorpulentus (LeConte, 1874). In gravel and under rocks 

 in rapid mountain streams from New Mexico to California and 

 northward to South Dakota, Montana, and British Columbia. 



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