lyDAF CURIv AND P1.UM PoCKETS. 353 



Plate VI. Exoascus farlowii Sadebeck, in carpels of Primus 

 serotina ly. Some of the carpels are not attacked and the flowers 

 form a means of comparison with the affected ones. From 

 Auburn, Ala. 



Exoascus varius Atkinson, in the leaves and shoots of the same 

 branches. The shoots are deformed and enlarged at the ends 

 but are not developing " witches' brooms." 



Plate VII. Exoascus cecidomophilus Atkinson, in fruits of 

 Prunus virginiana L. deformed by cecidomid larvae. In fig. 16 

 the strongly arched sides of the galls are the places where the 

 Exoascus is located. Midway of the raceme is a mumified fruit 

 which was deformed by Exoascus confusus Atkinson, earlier in 

 the season. In each raceme are healthy fruits. From near 

 Aetna, N. Y. 



Plate VIII. Fig. 17, Exoascus decipiens Atkinson, blacken- 

 ing the leaves and shoot of Prunus americana Marshall. From 

 Aetna, N. Y. 



Fig. 18, Exoascus sp. deforming the shoot and leaves of 

 Prunus virginiana L- From near Crowbar Point, west shore 

 Cayuga I,ake, N. Y. 



Plate IX. Exoascus communis Sadebeck. Deforming the 

 fruits of Prunus pumila L,. From Horticultural grounds, Cor- 

 nell University. 



Plate X. Figs. 20-22. Exoascus deformans (Berk.) Fuckel. 

 a. ascus, st. stalk cell, hy. cells of the hymenium, ep. epidermis, 

 m. mycelium. Fig. 20 from EaFayette, N. Y. , fig. 21, from Tem- 

 ple, N. H. Some of these asci have but four spores. Fig. 22 

 from Ames, Iowa. 



Figs. 23, 24, Exoascus insititiae Sadebeck, on leaves of Prunus 

 pennsylvanica E-, from Temple, N. H. 



Fig. 25, Exoascus cerasi (Fuckel.) Sadebeck, from leaves of 

 Prunus avium E-, Germantown, Penn. 



Plate XI. Figs. 26-32, Exoascus varius Atkinson on leaves of 

 Prunus serotina E. Eigs. 26-29 from Auburn, Ala., 30-31 from 

 Smyrna, Del., 32 from Temple, N. H. Fig. 33 E. varius? from 

 leaves of Prunus demissa Walp., Ute Pass, Colorado. 



Plate XII. Figs. 34-36, Exoascus farlowii Sadebeck, on fruits 

 of Prunus serotina L. Figs. 34-36 from Auburn, Ala., 35 from 

 London, Canada. 



