NEW DIMORPHOMYCETEAE. 255 



thecia 135-170 X 29-34 //• Receptacle 42-55 X 22-25 m- Longer 

 appendages 85 X 8 /x. Total length to tip of perithecium 190-230 /x- 

 On the mid distal surface of the right elytron of Diacantha 

 Deussenii Karsch, Xo. 3073; Kamerun, W. Africa. 

 ' This species is represented by only seven males and an equal number 

 of females; but although it is related rather closely to the other species 

 on this type of host, it seems well distinguished by the form of the 

 perithecia, and the prominent and characteristic auricles which char- 

 acterize the apex. Its comparatively short and stout appendages 

 recall those of D. Atdacophorae, but are quite unlike those of D. gemi- 

 7iatulnis which occurs on the same host. 



Dimeromyces helicoideus nov. sp. 



Male individual erect, straight, or slighth^ curved. Receptacle 

 hyaline, becoming slightly yellowish, its two cells of uniform diameter, 

 the basal cell of the appendage narrower distally, separated from the 

 free two- to three-celled appendage by a black constricted septum. 

 Antheridia normally solitary, pale purplish brown, except the hyaline 

 outcurved termination of the neck; the stalk well developed; erect, 

 appressed or but slightly divergent. Receptacle, exclusive of foot, 

 34 X 8 jLi. Appendage, above black septum, 25 X 5 /i. Antheridia 

 38 X 6 M- 



Female individual. Receptacle hyaline becoming suffused \\'ith 

 browTi except at the base; consisting of normally five cells; the three 

 middle ones somewhat flattened and oblique, the fourth producing 

 the normally single perithecium, the second, third and fifth normally 

 single secondary appendages, the lowest rarely double. Primary 

 appendage shorter but similar to the secondary which are long, 

 slender and tapering, distinguished above the basal cell by a black 

 septum. Perithecium strongly curved or recurved so that the tip may 

 touch the foot; the stalk-portion well developed but usually not dis- 

 tinguished, pale yellowish, merging into the rich dark purplish red- 

 brown of the ascigerous portion: tip usually not distinguished; the 

 apex subhyaline, short, blunt, unmodified. Perithecia 85-100 X 18 m- 

 Receptacle 42 X 12.5 /x- Appendages 50-170 m- 



Xear the margin of the right elytron of Crepidodera sp. Nos. 3061, 

 3057 and 3074. ISIetet. Kamerun, W. Africa. 



The strongly curved or helicoid habit of this species is very charac- 

 teristic. It is much smaller than a majority of the forms on related 



