104 RUDOLF SÖDERBERG, STUDIES OF THE BIRDS IN NORTH WEST AUSTRALIA. 
the Myzomela species especially some Ptilotis forms also engaged, have a very simple 
structure. Here it needs only be mentioned that the pistil in these open flowers with 
small scaly floral envelopes projects rather far outside the ring of stamina, which 
Fig. 25. Head of Myzomela pectoralis showing 
the bare part (a) of the skin at the base of the 
upper bill caused by the pollen, during the bird”s 
work in the flowers. 
Fig. 24. The flowers of the most common Eucalyptus. 
(Drawing by the author). 
have weak shafts, while the shaft of the pistil is stiff. As a bird, because of its 
comparitively short bill, is obliged, during its attempt to reach the small insects or 
the little brown nectaries at the base of the ovule, to push the whole bill down 
