EXTRA-AMERICAN LABOULBENIALES. 739 



form A-ertical series with little right and left divergence; the basal 

 cell large, darker, sterile, hardly as long as broad, the subbasal small, 

 subtriangular; the rest of the axis consisting of six cells all bearing, 

 like the subbasal, two antheridia; except the uppermost which bears 

 one, and is followed by two others which are terminal and superposed. 

 Primary stalk-cell larger than the subequal cells abo^-e it, distally 

 separated obliquely from the secondary cell, its extremity lying some 

 distance below the insertion of the appendage. Venter slightly or 

 distinctly inflated, the wall-cells describing one half to a whole turn, 

 the curved neck being turned inward in the former case and outward 

 in the latter; the base of the neck hardly distinguished from the venter, 

 and separated by a more or less sharp constriction from its distal 

 portion; which is usually narrower in the middle, swollen at either 

 end, abruptly narrowed or constricted below the tip; which is short, 

 inflated, tapering to the blunt, subtruncate apex; the lips closely 

 apposed, rather broad, not prominent. Spores about 40 X 5 ju- 

 Perithecia 1 75-280 X 30-42 m- Appendage 65-80 X 12-14 /x. Re- 

 ceptacle 60-90 X 21-24 IX. Total length 250-400 m- 



On the legs and at the base of the wings of Diopsis sp. Kamerun, 

 W. Africa. Nos. 2302, 2365, 2676, 2718 and 2719. 



The peculiarities of this species especially of the peritheciura are 

 more conspicuous in older individuals, the constrictions and curvature 

 of the neck as well as the spiral character of the wall-cells varying 

 considerably. The species is related to S. Diopsis and S. porredenSy 

 from which it is abundantly distinct. 



On Drosophilidae. 



Stigmatomyces subinflatus nov. sp. 



Straight, or the axis of the receptacle bent at a slight angle, pale 

 yellow; the receptacle nearly hyaline, the basal and stalk-cells of the 

 appendage, and the inflation below the tip tinged with reddish. Basal 

 cell of the receptacle longer, even twice as long as the subbasal, the 

 septum slightly oblique, the subbasal cell but slightly broader dis- 

 tally. Stalk-cell of the appendage twice as long as broad, faintly 

 reddish, the outer margin straight or slightly convex, rounded ab- 

 ruptly inward to the basal cell of the appendage; which is relatively 

 large, somewhat longer than broad, distally slightl}' oblique, sterile, 

 more distinctly reddish, especially the septa; the rest of the axis. 



