158 BETTS : THE FUNGI OF THE BEE-HIVE. 
specimens; but there seems little doubt that the fungus here described 
is identical with Berkeley and Broome’s species. 
Oospora favorum is found chiefly on old brood-combs, on the 
wax of the cocoons; it sometimes also occurs on the stored pollen. 
On wax or cocoons it has the appearance described by Berkeley and 
Broome—small yellow tufts. On pollen it forms a yellow wrinkled 
growth, having a velvety surface owing to the presence of numerous 
conidiophores, which consist of a short hyphae bearing chains of 
conidia. The hyphae are septate, and have a strong tendency to 
torulose growth, particularly in damp cultures. In such cultures the 
resemblance to a yeast is striking; no true hyphae are developed, but 
only strings of torulose cells, which are often indistinguishable from 
Fig. 27.—Oospora favorum. Conidia. x 1,400. 
the conidia, save by their more irregular and elongated shape (Fig. 
26). The fusiform bodies noticed by Berkeley and Broome were 
probably cells of this kind. 
The conidia are borne in short, simple or branched chains (Figs. 
27, 28). They are spherical when young, becoming larger and sub- 
globose or oval as they grow older. The filiform conidia seen by 
Massee (22) were perhaps of that form in consequence of having been 
long dried. The size of the conidia varies. In specimens from a 
culture on pollen they measured 6 x 4 »; but on various artificial 
media they range from 8 x 6 » (or even 10 x 7 p) to 7* 5p. Owing 
to the difficulty of distinguishing between torulose hyphal cells and 
conidia, it is impossible to be certain of the maximum dimensions. 
The fungus is at first white, later yellow. In some cultures (e.g., 
some of those on pollen and on honey media) this is the final colour. 
1My thanks are due to Miss Wakefield for her kindness in searching for the type 
specimen in the Berkeley Herbarium. 
