1912.] NATURAL SCIENCES OF PHILADELPHIA. 127 



Based on an unspecified number of males and females from two 

 localities. 



Single type here designated : cf ; Panamint Valley, California, 

 April, 1891; Death Valley Expedition; U. S. N. M. Collection. 



Pezotettix chenopodii. 



Insect Life, Vol. VII, p. 41, 1894. 



Based on large numbers of both sexes from a single locality. 

 Single type here designated: cf ; Grand Junction, Colorado, 

 June, [1893]; Brunei- ; Hebarcl Collection ex Bruner. 



Pezotettix hispidus. 



Can. Ent,, Vol. XVII, p. 12, 1885. 



Based on an unstated series of both sexes from one locality. 



Single type here designated: cf ; Colville, Washington, July 24, 

 1882; Hagen and Henshaw; Hebard Collection ex Bruner. 



Melanoplus fluviatilis. 



Ann, Rept. Nebr. Bd. Agr. for 1896, p. 136, fig. 34, 1897. 



Based on an unstated series from one region. 



Single type here designated : figured <? ; [Ashland, Nebraska, 

 September, 1896]; Hebard Collection ex Bruner. 



Pezotettix gracilis. 



Can, Ent., Vol. VIII, p. 124, 1876. 



Based on an unstated number of males and females from a single 

 locality. 



Single type here designated: c? ; Omaha, Nebraska, August- 

 October; Hebard Collection ex Bruner. 



Melanoplus herbaceus. 



U. S. Dept. Agr., Div. Entom., Bull. 28, p. 25, Fig. 13b, 1893. 



Based on a number of specimens of both sexes from one locality. 



Single t ype here designated : figured cf ; El Paso, Texas, [Novem- 

 ber,] 1887; Bruner; Hebard Collection ex Bruner. 



Pezotettix washingtonius. 



Can. Ent., Vol. XVII, p. 14, 1885. 



Described from a large series of both sexes from one locality. 



Single type here designated: c? ; Loon Lake, Colville Valley, 

 Washington, July 25, 1882; Hagen and Henshaw; Hebard Collec- 

 tion ex Bruner. 



