laterales subconniventes, oblique lanceolato-oblongi, 
1.5-1.7 mm. longi, 1.25-—2 mm. lati, marginibus leviter 
incisis; calear incurvatim dependens, cylindricum, api- 
cem versus leviter angustatum, subacutum, 7-8.25 mm. 
longum, 1.75-2 mm. diametro. Columna horizontalis, 
semiteres, 1.3-1.75 mm. longa; anthera compresse hem- 
isphaerica, antice breviter producta; pollinia subsphaer- 
oidea, stipitibus subspathulato-ligulatis deorsum angus- 
tatis 0.6—0.8 mm. longis, viscidiis separatis fere orbicu- 
laribus antice truncatis; rostellum porrectum, lobo in- 
termedio carnoso lanceolato, lobis lateralibus dimidio 
breviore leviter incurvatis obtusis; stigma quadrato- 
ellipticum. 
Ueanpa: Kigezi, Rutenga, Oct. 1940, Eggeling 4212 (Tyrer); Toro; 
Ruwenzori, Namwamba Valley, 1875 m. alt., in dense forest by river, 
Jan. 1935, Taylor 2807 a; Toro, near mouth of Mpanga River, on 
rock close to river, Sept. 1906, Bagshawe 1205; Ankole, 1 mile from 
Mbarara on shorter Kabale road, April 1944, Eggeling 5496. 
An outstanding addition to this small but interesting 
genus, and occupying an intermediate position as regards 
geographical distribution, the two other species coming 
from the Cameroons and Tanganyika Territory respec- 
tively. 8. bilobatus has a longer stem and broader leaves 
than the other species, but differs most markedly in the 
lip being deeply incised in the apical third with two large 
somewhat connivent lateral lobes and a very much small- 
er triangular middle lobe; the spur is also much longer. 
As in the other species the leaves blacken somewhat dur- 
ing drying while all three have similarly shaped tepals. 
In column and pollinarium characters the species agree 
well. 
Mystacidium tanganyikense Swmmerhayes sp. 
nov.; a M. venoso Harvey ex Rolfe foliis apice acutiori- 
bus, petalis latioribus, labelli calcari breviore, rostelli lobis 
lateralibus crassioribus haud barbatis sed tantum papil- 
[113 ] 
