EXTRA-AMERICAN L.\BOULBE\lAI.ES. 709^ 



partly black foot lateral and anterior; subbasal cell distinguished by 

 a slight constriction, slightly broader, more than twice as long, dis- 

 tally but slightly broadened, the suffused portions of both cells finely 

 punctate; distinguished by a very broad oblique septum from cell 

 VI: cells III-V replaced by a single, dark olivaceous, outwartUy 

 prominent cell. Insertion-cell free on both sides, somewhat broader 

 than long, translucent olivaceous, bearing distally the outer append- 

 age: which is apparently short and simple, its basal cell suffused, 

 hardly larger than the insertion-cell; basal cell of the inner appendage 

 slightly larger, bearing two short branches once or twice branched 

 which bear a small number of large stout antheridia near the base. 

 Cell VI broad, flat, subtriangular, externally prominent; cell VII 

 small triangular, concolorous, externally prominent, both faintly 

 punctate: basal cells broad, flattish concolorous with the cells below. 

 Perithecium nearly opaque, subconical, convergent, externally slightly 

 convex; its base very broad, its apex blunt, abruptly broader; the lips 

 rounded, the outer hyaline and more prominent, the inner suffused, and 

 subtended by a small darker area lying above a rounded paler spot; 

 below which, externally, the tooth-like,, opaque, persistent base of the 

 trichogyne projects conspicuously. Perithecium about 50 X 22 ;u 

 at base X 7.5 yu distally, the apex X 9 ^t. Cell I, 30 X 15 ji, cell II 

 70 X 16 m; cell III-V, 14 X Sm- Total length about 150 /x. 



On the left wing of Stcleocerus lepidopus Beck. No. 2328, Gambia 

 River, AVest Africa. 



This peculiar species was found among a small number of flies very 

 ■kindly collected for me by Dr. Wolbach. Three specimens have 

 been examined, two of which are fully matured. The appendages in 

 all are partly broken and do not reach to the apex of the perithecium. 

 The species belongs to the Ceraiomyces-type, with which it corresponds 

 in all respects. 



Rhizomyces circinalis nov. sp. 



Basal cell constricted below and entering the host by a rhizoidal 

 apparatus; subbasal cell somewhat larger, hardly longer than broad, 

 the two tinged with brownish yellow. Axis of the appendage con- 

 sisting of about thirty cells, or less, curved inward, distally circinate or 

 helicoid; the basal cell deep reddish brown, sometimes with an abor- 

 tive branch; the rest pale yellowish, with a tinge of brown; the sub- 

 basal smaller and darker than the cells above; which are somewhat 

 longer than broad, except at the circinate extremity, thick walled,. 



