726 THAXTER. 



On the legs of a fly belonging to the genus Borborus, or closely 

 allied. No. 2734, Kamerun, West Africa. 



This species, although related to the group of forms which occur 

 on the borborid genus Limosina, differs in the characters of its appen- 

 dage which closely resembles that of S. Borbori, although somewhat 

 less highly dcAcloped. The nine large antheridia are closely grouped, 

 with prominent necks. The perithecium is straight, or very slightly 

 bent distalh', its axis coincident with that of the basal and stalk-cell 

 portion which diverges at a characteristic angle from that of the 

 receptacle and appendage. Ten individuals have been examined. 



Stigmatomyces contortus nov. sp. 



Hyaline; the stalk-cells, and apparently the inner basal cell, forming 

 a rather slender perithecial stalk, against which the receptacle is 

 abruptly bent, so that the foot lies near the base of the venter, the 

 appendage projecting free from the point of abrupt curvature. Basal 

 cell of the receptacle abruptly curved and tapering somewhat below, 

 the subbasal somewhat longer and stouter. Stalk-cell of the appen- 

 dage viewed endwise, its axis tinged with brown, projecting upward 

 and backward away from the receptacle and perithecial stalk: (ap- 

 pendage in young individuals borne on a stalk-cell which is rounded 

 and nearly isodiametric, strongly convex below the insertion): con- 

 sisting of four axis-cells, the basal rounded, somewhat flattened, 

 brown, bearing a small somewhat flattened androphorous cell, which 

 occupies most of its distal surface and bears three antheridia, the rest 

 of the axis diverging from it at an angle of more than 45°, the three 

 successively smaller cells very obliquely superposed, strongly convex 

 externally, and separated by deep constrictions; the lowest (sub- 

 basal) but slightly united to the basal, bearing two antheridia, the 

 second two, and the third one; which is surmounted by a normal 

 antheridium, while a small terminal cell also functions as an antheri- 

 dium by developing a neck from the middle of its inner side at right 

 angles to its long axis. The, stalk-cells, and apparently the inner of the 

 basal cells of the perithecium, forming a relatively slender perithecial 

 stalk, of nearly uniform diameter, but irregular outline, which is 

 separated by a well marked constriction from the base of the venter: 

 the latter broatlly inflated below, owing largely to the overlapping 

 basal cells; which extend upward beside it for some distance, tapering 

 to the hardly distinguished, broad, irregular, slightly curved neck; 



