162 
Psyche 
[September 
The bee here considered, Anthophora abrupta also left an 
opening along the top of most of the chimneys, (figs. 4 and 
11) 1 but here it was not due to the method of building fol- 
lowed by E. taurea, for A. abrupta applied her load of mud 
wherever she happened to strike the edge, on the bottom 
or sides, and the job of spreading it was quickly done. In 
Fig. 4. A close-up view of the turrets over the nests of Anthophora abrupta. 
this species the chimney was somewhat greater in diameter, 
and it was rougher on the outside, but the interior surface 
was very smooth and neat. Sometimes in her hurry to apply 
the mud, the bee dropped it; at other times she might be 
seen brushing out loose, moist materials by kicking them 
backwards, probably the crumbs or scraps that had dropped 
1 Fig. 4 and 1 show these openings very distinctly, while Fig. 11 
does not show so many, because in the latter figure they were inverted 
when the photograph was made. In most of the turrets in Fig. 11 we 
see the bottom side. 
