142 Mr. F. Smith on the Construction of Hexagonal Cells. 
and unskilful;” I admit that the elevated portion of the cell is 
not perfectly sharp and angular at the corners, but it is sufficiently 
so to prove the truth of my assertion. I recall attention to the 
cells of Jcaria, which are exteriorly perfect in form, true hex- 
agons, and I direct attention to the cells, particularly the exterior 
ones, in the figure of the nest of Zatua morio; it is to these I 
would point, and not to the least perfect example, as proofs of the 
fact of some species of wasps finishing the exterior portions of 
their cells in a perfectly hexagonal shape.—F’. S., July, 1864. 
