722 THAXTER. 



is but slightly narrower at its base and distally often slightly broader 

 than the base of the subbasal cell. Stalk-cell of the appendage over- 

 lapping the subbasal cell slightly if at all, externally convex, more so 

 distally, but not abruptly distinguished from the basal cell of the 

 appendage; which is hardly more than twice as long as broad, the 

 axis curved inward, with the antheridia external, and consisting of 

 five subhyaline cells hardly longer than broad, except the basal, and 

 bearing each two closely associated antheridia, the fifth bearing but 

 one, a terminal single antheridium ending the series. Stalk-cell of 

 the perithecium broader than long, more than half enclosed by the 

 overlapping of the secondary stalk-cell on the left side and of the basal 

 cell which lies above it on the right side; the basal cells subequal, 

 somewhat prominent, as is the secondary stalk-cell; venter broader 

 and slightly inflated below, tapering slightly; the wall-cells becoming 

 finely granular; distally slightly prominent, the curved broad neck 

 of about the same length, the wall-cells of both distinguished by a 

 rather broad deep spiral furrow, continuous in the two, describing a 

 complete turn ending at the abruptly narrower tip, which is subtended 

 by a slight enlargement; apex not distinguished from the tip, the two 

 slightly inflated, distally subtruncate, with somewhat irregular lips, 

 the inner more prominent. Spores about 25 X 3.5 fx. Perithecia 

 140 X 32-35 ijl. Appendage 60 fi, its basal cell 14 X 6 ii. Receptacle 

 SO-90 X 18-21 M. Total length 225-250 m- 



On the abdomen of a fly belonging to the Anthomyidae. Kamerun, 

 No. 2639. 



Ten individuals of this form have been examined, which w^ere found 

 growing on the superior surface of the abdomen, where S. Limno- 

 phorac usually occurs, and where it reaches its most typical develop- 

 ment. The differences which distinguish the present species are thus 

 evidently not due to position of growth. The deep spreading furrows 

 which traverse the venter and neck, and the strong curvature of the 

 latter give it a very different appearance. Unlike S. Limnophorae, 

 the appendage curves inward, and the antheridia are directed out- 

 ward. The appendage is also more compact than is usually the case 

 in S. Limnophora, although it is of the same general type. 



