\E\V DIMORPHOMYCETEAE. ' 247 



appendage G4-S4 X 12 m; secondary 100-120 X 12 m- Total length 

 275-310 M- 



On the elytra of Leiochrodes mcdiamis Westw. Nos. 2951 and 2997, 

 Auki, Solomon Islands. Xo. 2998 Fulakora, Solomons (Mann 

 Collection). 



This species is closely related to D. decumbcns, but differs very 

 clearly in the form of its perithecium and the length and character of 

 its appendages, as well as in the great elongation of the neck of the 

 antheridium in the male. One pair shows a maculation of the basal 

 cell in both sexes, similar to that seen in D. decumbeus, but there is no 

 indication of it in the other individuals. 



Dimeromyces decumbens nov. sp. 



Male iiidividual dull brown, straight, the receptacle consisting of 

 three cells, the basal transversely rather coarsely punctate, the distal 

 end free from maculation. Appendage erect, four celled, the two 

 middle cells squarish and deeply suffused or opaque. Antheridium 

 single, erect, in contact with the appendage, the stalk well developed, 

 the neck clearly distinguished and bent sidewise distally. Receptacle 

 50-60 /i. Appendage 38 /x. Antheridia 80 X IS m- ' Total length 

 125 m- 



Female individual more or less uniform dull brown. Receptacle 

 consisting of four cells obliquely superposed, the anterior face of the 

 basal maculate as in the male. Primary appendage short, four- 

 celled, the terminal cell hyaline, emerging from a cup-like base formed 

 by the partial disorganization of the blackish wall below; the three 

 other cells small, subequal; the subbasal nearly opaque, the others 

 brown. Secondary appendage single, arising from the subbasal cell, 

 very large, subsigmoid : consisting of six or seven cells, the basal long, 

 stout, and curved; the rest successivel\' shorter; the terminal one 

 tapering to a blunt end. Perithecium darker dull brown, somewhat 

 more so above the paler, rather short stalk-portion Avhich curves 

 upward at an angle, even at right angles, to the prostrate receptacle: 

 the body of the perithecium elongate, slender, asymmetrical; the 

 distal portion slightly bent outward, the tip-region distinguished by 

 slight elevations; the coarse blunt apex bent slightly inward, snout- 

 like. Perithecium 235-310 X 38-42 /x; the stalk-portion 60-80 m • 

 Receptacle 70 X 34 /x. Primary appendage 45-60 X 12-14 /x; second- 

 ary 250-290 X 20-22 m- Total length to tip of perithecium 365-380 m- 



