( cxeni ) 
very rarely empty scales; grey or brownish seeming to be 
the pigment necessary to produce the effect of white to the 
unaided eye, this is confirmed by a reference to the genus 
Delias whose species are very solid in their whiteness, whereas 
under transmitted light I find the scales are decidedly brown 
in the one or two species I have examined. In making these 
final remarks I have no wish to dogmatise and I only state 
what my own investigations have shown me. I might further 
add that in all my many hundreds of microscopic preparations 
I have trusted to no one but myself, for I have made them all 
with my own hands, it being a subject that has occupied my 
attention for a good many years. 
