24 



NEW YORK STATE MUSEUM 



Aristida (triple-awned grass) 

 Fasciated, reduced leaves, fruit aborted (Bethel in litt.) Banks, '05, p. 140. 

 Fig. 19. Acarid. Siteroptes carnea Bks. 



Muhlenbergia 



Fusiform stem enlargement. Fig. 20. Marten '93, p. 155 



Itonid. Asteromyia agrostis O. S. 

 Fusiform stem enlargement, apparently an aborted Asteromyia agros- 

 tis gall. Dipt. Chlorops ingrata Will. 

 Orange-colored larvae at the base of the leaf sheath and associated with localized, 

 dead areas. Felt 'i8a, p. 129 



Itonid. Lasioptera colorati Felt a27 1 6 



Fig. 21. False 

 spike midge, As- 

 teromyia ? 

 agrostis. De- 

 formed head of 

 Distichlis. (Origi- 

 nal) 



Fig. 22. Sedge Psyllid vivia m a- 

 culipennis Fitch. injured head. 

 (Original) 



Reared from deformed stems. Howard '95, p. 20 



Hym. Joint- worm, Isosomorpha muhlenbergiae How. 



Phleum pratensis (timothy) 



Boring stems. Web. & Reeves '10 



Hym. Western grass stem sawfly, Cephus occidentalis 



Ril. & Marl. 

 Injuring stem at base of leaf sheath 



Itonid. C e c i d o m y i a sp. 



Alopecunis (fox-tail grass) 



Reared from seeds. Felt 'oje, p. 303 



Itonid. Grass seed midge, Itonida setariae Felt 



