FOOD PLANTS OF THF APHIDS. I9I 



HYDROCHARITACEAE. FROG'S BIT FAMILY. 



HYDROCHARIS. 



H. Morsus-ranae L. 



Rhopalosiphiim nymphaeae (Linn.) Koch. Buckton, 2, p. 13. 



ELODEA. Water-weed. 



E. canadensis Michx. (Philotria canadense). 

 Rhopalosiphiim nymphaeae Linn. (Aphis aquaticus Jackson). Davis 



1910a, p. 245. 



PHILOTRIA. See Elodea. 



GRAMTNEAE. GRAvSS EAAITLY. 



Agropyron. 



A. glaucum. Colorado Blue-stem. 

 Brachycolus tritici Gillette. Gillette, 1911b, p. 441. 

 Chaitophoriis agropyronensis Gillette. Gillette, 1911b, p. 443. 



AGROSTIS. Bent Grass. 



A. plumosa. 



Tetraneitra graminis Monell. Patch, 1910a, p. 210. 

 A. alba L. Fiorin or White Bent Grass (vulgaris Thurb, Red Top). 

 Brachycolus stellariae Hardy. (holci Hardy). Schouteden, 1906a, 



p. 212. 

 Macrosiphum cerealis (Kalt.) ; Pergande, 1904a, p. 20. 

 Siphonophora avenae Fab. Williams, 1891, p. 13. 

 AIRA (in part). See Deschampsia, 



ALOPECURUS. Foxtail Grass. 



G. geniculatus L. Floating Foxtail Grass. 



Toxoptera graminum Rondani. Hunter, 1909, p. 102. 



ANDROPOGON. Beard Grass. 

 A. furcatus Muhl. 

 Schizoncura corni Fab. (S. venusta Pass.) (E. cornicola Walsh) 

 (E. fungicola Walsh )(S. panicola Thomas). 

 Hunter, 1901, p. 81. 



A. sorghum. 



Toxoptera graminum Rondani. Hunter, 1909, p. 102. 



ANTHOXANTHUM. Sweet Vernal Grass. 



A. odoratum L. 



Sipha graminis Kaltenbach. Schouteden, 1906a, p. 212. 



ARRHENATHERUM. Oat Grass. 



A. elatius (L) Beauv. (Avena elatior). Tall Oat Grass. 

 Toxoptera graminum Rondani. Hunter, 1909, p. 102. 



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