The PERONOspoREyE OF Iowa. 4p 



6. P. CALOTHECA. — DcBy. 



On Galium horeale. Decorah. 



7. P. EFFUSA. — Rahb. 



On Chenopodium alhtim. Ames, Decorah, Iowa City. 

 On C. hybridum. Iowa City. 



8. P. EUPHORBIAE. Fkl. 



On Euphorbia scrpylli/olia, E. maculata, E. glypto- 

 sperma. This species was found in Hamilton county 

 in 1886. Last summer (1888) it was observed on 

 the three hosts mentioned in great abundance in all 

 parts of the state. 



9. P. FICARI^. — Tul. 



On Ranunculus repcns. Iowa City, Decorah. 



10. P. GANGLIFORMIS. DcBy. 



On Lactuca ludoviciana. Ames, Iowa City, (McBride). 



11. P. GERANii. — Peck. 



On Geranium carolinianum. Iowa City. 



On G. macidatum. Decorah, Iowa City, (McBride). 



12. P. GRAMiNicoLA. — Schrocter. 



On Seiaria viridis. Ames. 

 S, italica. Ames. 



13. P. HALSTEDii. — Farl. 



On Bidens frondosa, B. chrysanthemoides^ B. connata^ 

 B. cernua. Ambrosia trijida, A. arte^nisiaefolia Helian- 

 thus grossc-serratus, H. doronicoides, Silphium perfo- 

 liatum. Ames. Ambrosia triJida,\o\y2iQ\\.y^ (JAcB.') 



On Rudbcckia laciniata, R. triloba. Decorah, Iowa 

 City (McBride). 



14. P. LEPTOSPERMA. DcBy. 



On Artemisia biennis. Ames (Halsted), Iowa City, 

 (McBride). 



15. P. LOPHANTHi. — Earl. 



On Lophanthus scrophulariaejolius. Ames, Iowa City, 

 Decorah. 



