34 PROCEEDINGS OF THE AMERICAN ACADEMY 



Heimatomyces marginatum, nov. sp. 



Long and slender, at first nearly hyaline, then yellowish. Peri- 

 thecia straight, then suddenly bent inward below the hyaline, 

 neck-like, strongly curved tip. Basal cells of the receptacle sub- 

 triangular, the sub-basal half as large as the basal, the three cells 

 at the base of the perithecium more than usually developed : the 

 terminal cells all becoming black and opaque at maturity; the ter- 

 minal one continued by a squarish outgrowth basally hyaline, at 

 first lateral and external, becoming terminal (the true apex of the 

 cell being pushed inwards and becoming lateral), hardly exceeding 

 the tip of the perithecium which it conceals. Spores 30 X 3/i. 

 Perithecia 95-110 x 22 jx. Total length to tip of perithecium 

 140-160 jx. Basal cells of receptacle 25 li. 



On Laccophilus maculosus and Hydroporus spurius, Connecticut, 

 Maine. 



A form peculiar for the modification of the terminal cells of the 

 receptacle, which makes the perithecium appear as if bordered by 

 a black band. It is found in company with H. paradoxus, and 

 recalls the supposed genus Chitonomyces, which is said to be simi- 

 larly associated on the left elytron of its host. 



CERATOMYCES, nov. gen. 



Receptacle reduced, consisting of a small number of basal cells, 

 above which it is directly continued by the basal cells of the peri- 

 thecium and antheridial appendage. Perithecia highly developed, 

 the walls composed of four longitudinal rows of superposed cells, 

 the outer row continued into a horn-like appendage. Antheridial 

 appendage arising at the base of the perithecium, composed of 

 a series of superposed cells the upper angles of which may be 

 cut off to form the base of filamentous appendages (antheridia ?). 

 Asci subclavate, 4-spored. Spores fusiform or acicular, once sep- 

 tate, involved in mucus. 



Ceratomyces mirabilis, nov. sp. 



More or less deeply suffused with yellowish brown. Perithe- 

 cium elongate, the walls composed of longitudinal rows of super- 

 posed cells, about twenty-three in each row, the cells of adjacent 

 rows alternating, their long axes transverse : the outer row con- 

 tinued below the apex of the perithecium as a curved horn-like 

 projection, basally constricted and suffused, tapering distally to a 



