150 BETS : THE FUNGI OF THE BEE-HIVE. 
Penicillium crustaceum, Linn. 
This ubiquitous species is, as might be expected, common in 
bee-hives. It will grow on nearly any part of the contents of the 
hive, but is not usually found in great quantity until after the death 
of the stock. 
An interesting point is the occurrence of two varieties differing 
chiefly in the size of their conidia. The one, which is probably more 
Fig. 17.—Penicillium crustaceum. Conidiophore and conidia (3-5). x 1,400 
prevalent, has conidia 3-5 » in diameter. The conidia of the other 
are 2.5-3 » in diameter; this is perhaps the species studied by Brefeld 
and referred to by him as Penicillium glaucum (Lafar, 18, P- 333) 
The conidiophores are much alike in the two cases and ave of 
the usual Penicillium form (Figs. 17, 18). The stecioniats are 
TO-15 ps in length in both varieties (perhaps 10-12 mw in the form 
with small conidia). The branches bearing them are 15-17 p in 
