UPON SCALE -INSECTS. 37 



Stromata small, pinkish white ; pycnidial orifices con- 

 spicuous, coral red, few in number and often arranged 

 in borse-shoe fashion: only slight development of hypo- 

 thallns. Similar to 1, except as regards hypothallus. 



3. — On a black Aleurodes, sp., on the lower surface of the 

 leaf of Ochlandra, sp. (a bamboo), figs. 31 and 32. A fine 

 lot of material collected by Macmillan at Pnssella, Feb., 

 1899. 



Stroma creamy white, much flattened with irregular sur- 

 face, large, as much as 4*5 mm. in diameter, O5-0-75 mm. in 

 thickness, neighbouring ones often fused together owing to 

 the scales being so numerous ; pycnidial orifices yellow 

 brown or greenish, inconspicuous, numerous, often crowded 

 on the central raised part of the stroma : no definite hypo- 

 thallus ; pycnidium 180/* deep, very definite in shape being- 

 oval in longitudinal section with a very short neck. 



This form differs from 1 and 2 in the paler and flatter 

 stroma and in the smaller and more numerous pycnidial 

 orifices. However some of little and perhaps younger 

 stromata more nearly resemble 1 and 2. 



4. — On a pale Aleurodes, sp., on the lower surface of the leaf 

 of Memecylon cairitellatuiu (figs. 33, 34, and 35). 



Stroma bright yellow, fades with age : pycnidial orifice?, 

 deep orange, conspicuous, often arranged in a circle or 

 horse-shoe ; a very marked hypothallus present as a rule. 

 This Aschersonia in all essential features, except colour, 

 resembles A. aleyrodis. 



Interspersed with it on the same scale were plentiful flat 

 brown circular pustules resembling Webber's sterile " brown 

 mealy-wing fungus." It is described in a later section of 

 this paper. 



5. — On a pale Aleurodes, sp., on the lower surface of the 

 leaf of Flemingia strobilifera. 



Stroma buff-yellow, averaging 1mm. in diameter ; pycni- 

 dial orifices conspicuous, orange, few in number and often 

 arranged horse-shoe fashion; hypothallus present, extending 

 05 to 1 mm. from stroma. 



