THE PARASITIC EXOASCEAE. 151 



T. insititiae (Johan.) on Prunus Insititia and P. domestica, 



in Europe, and P. pennsylvanic-a in North America. 

 T. decipiens (Atk.) on Pruniis amcricana in North 



America. 

 T. cerasi (Sad.) on Prunus Cerasus and P. Chamaecerasus, 



in Europe, and P. avium in North America 

 T. pruni (Tul.) on Prunus domestica and P. Padics in 



Europe and North America. 

 T. mirabilis (Atk.) on Prunus angitstifolia, P. hortulana 



and P. americana in North America. 

 T. Farlowii (Sad.) on Prunus serotina in North America. 

 T. confusa (Atk.) on Prumis virginiana in North 



America. 

 T Rostrupiana (Sad.) on Prumis spinosa in Europe. 

 T. communis (Sad.) on Prunus maritima, P. pumila, P. 



aynericatia and P. nigra in North America. 

 T. longipes (Atk.) on Prunus americana in North America. 

 T. rhizipes (Atk.) on Pruniis trijlora in North America. 



(c) On Potentilleae : 



T. potentillae (Johan.) on P. sylvestris, P. canadensis, and 

 P. geoides in Europe and North America. 



D. Aesculus-stem on Eucyclieae : asci plump, cylindrical, with 

 ilat or rounded apex. 



(a) On Sapindaceae : 



T. a^scidi (Ell. et Ever.) on Aesculus californica in 

 California. 

 (6) On Anacardiaceae : 



T. purpurascens (Robins.) on PMis copallina in North 

 America, 

 (c) On Acerineae : 



2\ acericola (Mass.) on A. campestre and A. Pseudoplatanus 



in Italy. 

 T. a-cerina (Eliass.) on A. platanoides in Sweden. 

 T. polyspora (Johan.) on A. tartaricum in Europe. 



II. Genus. Magnusiella : asci ovoid or spheroidal. 



M. githaginis (Sad.) on AgrostemrrtM. Githago in Denmark. 

 M. umhelliferarum (Sad.) on Heracleum Sphondylium, 

 Peucedanum palustre, and P. Oreoselinum in Europe. 



