induces an auriculate aspect. Furthermore, much depends 
on the angle at which the labellum is held when it is ob- 
served. If descriptions and drawings are made from dried 
specimens, allowances have to be made for changes ensu- 
ing after the flowers are crushed or flattened by pressure. 
Fortunately aspecimen of S. ovatilabia collected by Mar- 
ston Bates in Guatemala and preserved in alcohol has 
made it possible to represent the species with an ap- 
proach to its aspect when alive. 
Stelis ovatilabia Schltr. drawn in part from the type and from 
Shannon 3670, 1, flower enlarged about eleven times. 2, column (an- 
ther removed) enlarged about twenty-one times. 3, labellum enlarged 
twenty times. 4, labellum from the type enlarged about twenty times. 
5, petal enlarged twenty-four times. 6, column and petal enlarwed 
about eighteen times. 
Drawn with the aid of the camera lucida from a dried specimen 
by BLrancue AMES 
GvuatemaLa, April 1878. Bernoulli & Cario 583: Department of 
Chimaltenango, Tecpam at 8,500 feet altitude. In mixed pine and oak 
forest. May 17,1931. Marston Bates 19; Chichavac. At 8,000-9,000 
feet altitude. Flowers greenish white. In pine and oak woods. July 
[ 165 ] 
