DILOI'Hosi'oKA. 479 



Dilophospora. 



Dilophospora graminis I'esm. il'.ritain.i Tin- attack- rye, 

 wheat, and various grasses. < >hlong li-ht .-pots art- pr< "liu-ed 

 and Lear the pycnidia ; when these occur in the tlower heads, 

 stunting of the grain takes place. (See also l)ili>lii'i, p. L'L'L'.i 



2. FAM. NECTROIDEAE. 



The fungi of this family are chiefly pycnidial forms of the 

 Ascomycetes, and as such have already been considered. 



3. FAM. LEPTOSTROMACEAE. 

 HYALOSPOKAK. 



Leptothyrium. 



I'ycnidia black and discoid. Spores ovoid or spindle-shaped, 

 unicellular, and hyaline. 



Leptothyrium periclymeni <l>e-m. ). < Mi living leaves of 

 specie.- of Lonicera. (Britain.) 



L. alneum (l/v.) produces roundish leaf-.-pots on species of 

 J/////.S. (liritain and Aniciica.) 



L. acerinum i Ivunze) causes spotting of the leaves of .1 

 campestre and J. iil<itini<inl,-. (liritain.) 



- veral other species occur hotli in Kuropr ami America. 



Melasmia. 



The lilack pycnidia occupy black extended stromata. < 'miidia 

 >imple and unieellulai-, borne on roil-like conidioplioiv-. 



Melasmia berberidis Tlmm. et. Wint. < MI living leaves 

 of barberry. l'.ro\vn spot- are pioduced, bearing the py.'iiidia 

 black points; the spots CEUSB total ol 1 partial death ol' the 

 le;i\-.-<, i'reipieiitly cudiirj in def')li;iti..n of the >hriibs. 



M. empetri Ma-n. ( I'.ritain.) This species \\as ol,vei\,-d by 

 Magnus 1 can-ing an epidemic disease n ero\\ bei i \ . The 

 -vmploins were abiioi'iual elongation "I \"UIIL; tuiu-, and the 

 leave- remained -mailer than usual. The rind of the -|em \\a- 

 foiind to be jiernieated by a m\celium \\hidi produced black 



/; ,,//'. il. i/'iif^-/,, lininii, '('-//.. ISM!, \\iili illu-t i .it i- 



