Davis — A Provisional List of Parasitic Fungi. 849 



EMPUSA APHIDIS Hoffman 

 On various aphides 



EMPUSA CULICIS A. Braun 

 On Chironomus, 



EMPUSA MUSCAE Conn. 

 On house flies 



EMPUSA RHIZOPHORA Thaxt. 

 On caddis flies 



EMPUSA SCIARAE Olive* 



On Sciara 

 EMPUSA GRYLLI Fres. 



On Caloptenus 



SAPROLEGNIACEAE 



SAPROLEGNIA THURETII DBy. 

 On dead flies 



PERONOSPORACEAE 



ALBUGO BLITI (Biv.) 0. Kuntze 

 On Amaranthus retroflexus 

 hybridus 

 blvtoides 

 Acnida tuberculata 



ALBUGO PORTULACAE (DC.) O. Kuntze 

 On Portulaca oleracea 



ALBUGO CANDIDA (Pers.) O. Kuntze 

 On Lepidium virginicum 

 Capsella Bursa-pastoris 

 Cakile edenitiila 

 Raphanus sativus (cult.) 



caudatus (cult.) 

 Brassica alba (cult.) 



nigra 

 Sisymbrium officinale 

 Radicula palustris 

 Cardamine douglassii 



