(visi. |) 
and several of Miiller’s letters, full of interesting and 
novel observations, were communicated by the former to 
* Nature.” 
Miler did not occupy himself with entomology till after 
his removal from the sea-coast, his earliest important memoir, 
on Termites, the real complexity of whose social system he 
was the first to appreciate, appearing in the ‘‘ Jenaische 
Zeitschrift,” in 1878. His subsequent contributions, mainly 
to ‘‘ Kosmos,” include papers on the relations of insects and 
flowers, dimorphism, the life-histories of aquatic forms, the 
case-making of Phryganeide, and especially on the ‘ recogni- 
tion-characters’’ of butterflies and the more complex 
phenomena of mimicry among them. His _ well-known 
theory, which supplements that of Bates, is discussed in 
the following pages. 
In spite of losses and misfortunes, Miller continued his 
work almost to his death, which took place on May 21 in the 
preceding year. His inestimable services to science brought 
him little gain or official recognition, and this Society con- 
ferred a real honour upon itself by electing him an Honorary 
Fellow, in 1884. 
Many of his notes and papers, especially that on ‘* [tuna 
and Thyridia,”’ have appeared in our Proceedings as trans- 
lations, chiefly by Prof. Meldola, F.R.S., who has done more 
than anyone to bring Miller’s work to the notice of British 
entomologists. 
He contributed papers to our ‘‘ Transactions,’’ in 1878, 
1879 and 1895, the last, entitled ‘‘ Contributions towards the 
history of a new form of larve of Psychodide (Diptera) 
from Brazil,” being virtually written in 1881; the plates 
accompanying it are noticeable as beautiful examples of his 
powers of draughtsmanship. The number of his separate 
papers on all subjects is probably between 150 and 200. 
Grorcr CuristopHeR Dennis, F.E.S., was in business in 
York, but retired about two years ago to devote his whole 
time to natural history and outdoor pursuits. He was an 
excellent lepidopterist and made many lengthened excursions 
to different parts of the country for collecting purposes ; 
quite recently he had taken up the study of Neuroptera and 
