410 PROCEEDINGS OF THE AMERICAN ACADEMY. 



< >n the upper mii far,- near the tip of the abdomen of a species of 

 Berlin Museum, No. 850. Tanga, Africa. 



CERAIOMYCES nov. gen. 



Structure of perithecium as in Laboulbenia, its stalk-cell united to the 



the free stalk-cell ol the appendage, which hears a well differ- 



entiated basal cell terminally, from the end of which are borne antheridial 



branches, the successive cells of which produce terminally either succes- 



ondary branchlets or antheridia or both, much as iu Laboulbenia. 



\i • ptacle two-celled. 



Ceraiomyces Dahlii nov. sp. 



Perithecium large, blackish brown, with an olive shade, becoming opaque, 

 usually Blightly curved, tapering gradually to the slender undifferentiated 

 tip; the anterior lip-cells forming two appressed hyaline-tipped finger- 

 likr projections; the base very broad, translucent, dull brownish, bulging 

 jpicuously below the venter, especially on the left side; the stalk-cell 

 small, nearly isodiametric, united on it- inner side to the base of the stalk- 

 cell of the appendage. The latter free, though often in contact with the 

 base "f the perithecium, dull blackish olive, outwardly inflated, narrower 

 terminally where it bears the characteristically differentiated basal cell of 

 tli<' appendage, which becomes almost opaque and is Bomewhal flask- or 

 bottle-shaped with a rounded extremity, from which, typically, two diver- 

 gent branches arise which in turn may branch one to three times suh- 

 dichotomously ; the long Blender flask-shaped antheridia borne, one to two 

 ther, distally from the successive cells. The basal cell of the recep- 

 tacle nearly Bpherical, penetrating the host by a long filament which is 

 Blender except for an enlargement immediately below the integument of 

 the host, Bimple at first but becoming more or less copiously branched ; 

 the upper cell very large and elongate. Spores about 30 x 3//, Peri- 

 thecium 275— 310 • 55 60/*; the base, including the stalk-cell, 68— 72 X 

 - i. Appendage 75-85// (the basal cell L8 x 12 /a), the stalk-cell 

 10-45 • 18 -22 fu Receptacle 175-240 x 3o H . (the basal cell 20-22//). 

 I Lai length to tip of perithecium I 11 " 675 /t, average 550 /t. 



On various parts of a small flower fly. Ralum, New Pomerania. 

 in Museum, Nos. 1283 and 1298. Occurring more often on the head. 

 where it might be mistaken for a dipterous antenna. 



Dimeromyces coarctatus nov. sp. 

 MaU Individual. Receptacle Dearly hyaline, consisting of usually 

 ip rposed cells the npper separated by a dark-colored constriction 



