720 THAXTER. 



surmounted by two additional ones, the upper with a stout spine; 

 the whole appendage relatively short and stout, diverging from the 

 perithecium and free to its base; the antheridia turned sidewise, and 

 distinctly tinged with brownish yellow, like the cells which bear them. 

 Stalk-cell of the perithecium broader than long, the secondary stalk- 

 cell much smaller, as are the basal cells; venter of the perithecium 

 longer than the distal portion, its base hardly lower than the insertion 

 of the appendage, evenly inflated, or more convex externally, merging 

 distally with the neck; which is not abruptly distinguished, its outline 

 more or less concave on both sides; the tip rather abruptly distin- 

 guished, tapering to the undifferentiated apex, which is five-lobed, 

 the lobes rather prominent and somewhat irregular. Spores about 

 25 X 3 M- Perithecia 155-170 X 42-50 fx. Appendage 42-48 X -i /jl. 

 Receptacle 80-100 X 28 fx. Total length 250-280 m- 



On the head and at the base of the wing of a small dull fly belonging 

 to the Agromyzidae. No. 2730, Kamerun, West Africa. 



Although this species is not otherwise peculiar, it seems well dis- 

 tinguished by its somewhat divergent, short, stout appendage, the 

 base of which is so narrow as to appear constricted, the basal cell dark 

 colored and narrow, the cells above it much broader. It is perhaps 

 more nearly related to S. Drapctis than to any other described form. 



On Anthomyidae. 



Stigmatomyces macrandrus nov. sp. 



Long and slender, straw-colored above the hyaline receptacle, with 

 faint brownish shades near the base of the venter. Receptacle 

 usually curved, of nearly uniform diameter throughout, the basal cell 

 sometimes slightly broader, less than half as long as the subbasal, its 

 base broad and rounded beside the small sublateral foot. Stalk-cell 

 of the appendage slightly misplaced laterally on the right side, nearly 

 twice as long as broad, externally rounded, distally, below the rather 

 broad insertion. Appendage very slightly divergent, very long, 

 reaching some distance beyond the venter, slender, tapering, slightly 

 curved outward at the extremity ; its axis consisting of seven or eight 

 successively smaller cells; the basal cell slightly tinged with brown, 

 somewhat longer than broad, the terminal cell minute, bearing a 

 single antheridium, which is surmounted by a second terminating the 

 appendage; all the remaining cells bearing two, obliquely superposed; 



