256 THAXTER. 



hosts, and has only been seen in the position indicated; except that in 

 one instance a few smaller more nearly straight indi^•idllals were found 

 on the posterior right leg. 



Dimeromyces Hyperacanthae nov. sp. 



Male individual subhyaline to faintly brownish, relati^'ely small, 

 the foot large. Receptacle consisting of three cells, one or both of the 

 distal bearing antheridia; which are slender, erect, somewhat flaccid, 

 the neck slightly curved, relatively long; the appendage erect, dis- 

 tinguished from its basal cell by a broad black constricted septum. 

 Receptacle 30 X 12 ^u, exclusive of foot which is 16-18 /x. Appendage 

 with basal cell 42 /z. Antheridia 42 X 5.5 m- 



Female individual uniform rather dark translucent reddish brown; 

 erect. Receptacle consisting of normally five cells, the basal larger, 

 the rest slightly flattened and oblique, a single perithecium usually 

 arising from the fourth; the rest, except the basal, producing append- 

 ages the basal cells of which give rise to one or often two free branches 

 distinguished by black constricted basal septa, suberect, rigid, ap- 

 pressed or hardly divergent, the slightly tapering extremities becom- 

 ing disorganized and seldom reaching to the tip of the perithecium. 

 Basal cell of primary appendage not distinguished from those of the 

 receptacle, its outer margin enlarged and bulging so as to throw the 

 insertion of the free appendage inward; the latter short, distinguished 

 by a black septum. Perithecium quite sessile, short and stout, rarely 

 longer and more slender, the outer margin nearly straight, or less 

 convex than the inner, the tip undifferentiated, or sometimes indicated 

 by a slight depression; the apex subhyaline, its distal margin straight 

 and oblique, viewed sidewise, owing to a finger-like or tooth-like 

 protrusion upward and inward from its inner angle. Perithecia 100- 

 135 X 30-36 fi. Receptacle, excluding foot and basal cell of primary 

 appendage, 50-85 X 25 (x. Appendages 100 X 6 /z, longest 150 n. 

 Total length to tip of perithecium 160-210 //; the more slender form 

 up to 335 n, through the elongation of the perithecium. 



Forming a dense group at the tip of the free upper surface of the 

 abdomen of Hyperacantha robusta Ws. and Hypcracantka Sp., Nos. 

 3070-71, Kamerun, W. Africa. 



The more slender and elongate form of this species, above referred 

 to, was found protruding from just beneath the tips of the elytra. 

 The material is somewhat scanty and it is barely possible that it may 



