pollinia duo, sphaeroidia vel pyriformia, stipite uno sed 
raro superne diviso lineari vel ligulato apice saepe dila- 
tato, viscidio uno; stigma excavatum; rostellum modice 
vel valde productum, saepius decurvatum et columnae + 
adpressum, interdum parte distali incurvatum vel por- 
rectum, viscidio amoto+ profunde bipartitum. 
Species typica:—M. eailis Lindl. 
Characteristic features are the short stem, simple race- 
mose inflorescences with flowers arising singly, the almost 
entire lip, the short column, in which the androclinium 
is rarely horizontal being usually markedly sloping up- 
wards towards the back and sometimes very much so, 
the common stipes and viscidium and the deeply-cleft 
elongated rostellum. This latter is usually adpressed to 
the column in the lower part but may be curved upwards 
in the distal part or rarely is wholly divergent. After re- 
moval of the viscidium the two lobes are clearly evident. 
Most of the characters, such as flower size, shape of 
perianth members, size of lip, length and shape of spur, 
nature of column, shape of pollinarium and rostellum, 
exhibit more or less continuous gradations from one ex- 
treme to the other and thus indicate the entity of the 
genus. It is, however, possible to separate three groups 
or sections in each of which the floral characters are com- 
bined to give a more or less recognisable facies. [| have 
therefore arranged the species in these sections, which 
are shortly characterised, but as I have not seen all the 
species some transferences may be necessary later. 
Section I. Ku-microcornsaA Summerhayes. 
Flores parvi vel minimi; labellum parvum vel medio- 
cre; columna dorso brevis, clinandrio dorso tantum paulo 
adscendente; anthera antice vix producta; pollinii stipes 
brevis, viscidio pro rata magno = quadrato ovato vel 
orbiculari. 
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