254 THAXTER. 



On the elytra and inferior abdomen, the larger at the tips of the 

 elytra, of Hyperacantha Kolbei \\s. No. 3072; and Diacanthn 

 Deusseni, Kamerun, West Africa, 



Although this common species varies enormously in size its growth 

 being apparently influenced by its position on the host, it does not 

 vary essentially in fundamental characters. It is distinguished from 

 the nearly allied D. AulacopJwraehy the absence of any peculiar modi- 

 fication of the basal cell of the primary appendage, the extraordinary 

 development of its perithecia, its fundamentally yellow color, and 

 very slender and elongate appendages. The male is almost always 

 readily distinguished by the presence of symmetrically paired antheri- 

 dia arising from the distal cell on either side of the basal cell of the 

 appendage which they enclose in a characteristic fashion. 



Dimeromyces auriculatus nov. sp. 



Male individual almost hyaline. Receptacle erect, consisting of 

 three cells, the two upper bearing superposed antheridia; the basal 

 cell of the appendage slightly longer than broad, separated from the 

 more slender free appendage by a black constricted septum. Anther- 

 idia slender with long stalk-cells, hyaline, the efferent region purplish; 

 the neck hyaline, rather stout; the whole slightly curved outward 

 throughout. Receptacle, exclusive of foot and base of appendage, 

 20 X 8 ju. Basal cell of appendage 8.5 X 4.5 /x. Antheridia 38 X 6 /x. 



Female individual rather short and stout. Receptacle erect, sub- 

 triangular, consisting of five cells; the three middle ones similar, flat- 

 tened, oblique and somewhat curved; the subterminal bearing the 

 single perithecium; the second, third and fifth, secondary appendages; 

 the latter rarely double, separated by a large black constricted sep- 

 tum, stout, hardly reaching above the middle of the perithecium from 

 the base of which they may curve outward, especially those from the 

 terminal cell: basal cell of the primary appendage, relatively small, 

 bell-shaped, producing a single terminal free appendage separated by a 

 black septum and constriction. Perithecia relatively short and stout, 

 yellow and abruptly narrower above the insertion, slightly asymmetri- 

 cal, somewhat straighter on the inner side, subfusiform, brownish 

 yellow; the stalk- and tip-regions not abruptly distinguished, the 

 former tapering rapidly to the abruptly distinguished hyaline apex, 

 which is usually symmetrical, a distal rounded protruding termina- 

 tion subtended on either side by similar ear-like appendages. Peri- 



