220 ROCHESTER ACADEMY OF SCIENCE. 



when young smoky hyaline, nuceolate or granular, becoming brown, 

 23-28 X 6-10 1'., and uniseptate. On smooth areas on bark of hemlock, 

 Tsuga canadensis Cam, in woods, Lyndonville, N. Y. , Nov., 1905. 

 This species is ambiguous between Z)/^w<?i/'//^r/<2 and Aniphisphcrria. 

 At first it is covered and wholly like Didymospha'ria but with age 

 becomes more superficial, and is partially denuded, with sporidia not 

 broadly elliptical, nor as dark as Didymosphaeria, but narrow-elliptical 

 and smoky-hyaline to brownish in color. 



363, Diaporthe ailanthi megacerasphora Fairman, n. van 

 Perithecia in a yellow stroma, formed of the scarcely altered sub- 

 stance of the wood or bark, valsoid, black, with very long, 2-4 mm., 

 black, simple or branched, spreading, flexuous or contorted, tuberculate 

 roughened, sub-spinous ostiola, which are sometimes knobbed, but 

 generally narrowed to a sub-acute, translucent, light brown tip, and 

 which pierce the bark singly, or in erumpent fascicles of i to 20 ; asci 

 clavate oblong, 45 x 11-12 />. ; sporidia irregularly biseriate, hyaline, 

 oblong fusoid, acute or rounded at the apices, at times sub-constricted 

 (at length, uniseptate?), 4-guttulate, usually with one half a little 

 larger than the other, 10-13 ^ 3 P-. 



Etym. from Greek, megas, long, and cerasphora, horn-bearing, 

 from the fungus bearing very long ostiola. On dead and rotting 

 limbs of Ailanihus glandulosiis Desf. , Lyndonville, N. Y. , Oct., 1905. 

 The perithecia leave a deep excavation in the wood when picked 

 out, and the contents are white, and waxy when fresh, and sometimes 

 push up the bark above them and underlie it. No distinct black cir- 

 cumscribing line was noticed around the stroma. In the description 

 of Diapoi-the ailanthi Sacc. , in North Am. Pyrenomycetes, Ellis and 

 Everhart say the ostiola are quite variable and are "sometimes J^ 

 mm. long." In our variety they are very much longer. In the 

 Sylloge, Vol. I, p. 621, it is stated that the nucleus is yellow, that of 

 var. megacerasphora is white. The peculiar tuberculate-roughened 

 ostiola, with hyaline to light brown apices, and great length of the 

 ostiola render this a well marked variety. The surface of the wood is 

 covered with a thin, plane black crust. An interesting phenomenon 

 was noticed in this species in the ejection of the sporidia. Normally 

 these are ejected through the ostiola, at the apex, after escaping from 

 the ascus during rupture, or ascorhexis (askos, a sac or ascus, and 

 rhexis, a rupture of a vessel or organ). The ejaculation of the 

 sporidia has received various names, according to the language of 



