802 THE ENTOMOLOGIST. 
those who have so cordially assisted the ‘ Kntomologist’ in the 
past will kindly continue to give us their support, and, may we 
venture to suggest it, use their influence to increase the circula- 
tion of the Journal, why then it may be possible for us to give 28 
or 32 pages every month, instead of the usual 24 pages. 
In the new volume for 1893 it is proposed to make some 
alterations in the arrangement of contents. Thus, for example, 
the various items which now find a place under the general 
heading, ‘‘ Notes and Captures,” will be grouped under special 
heads. 
It will be noticed that in the present volume (and also 
in those for 1890 and 1891) the index has been considerably 
amplified, thus adding to the usefulness of the work without 
increasing the cost to subscribers. It was not thought necessary 
to index every species mentioned in the volume, but none of 
interest have been omitted. 
We are glad that the Exchange department continues to be 
useful to a large number of our readers. Lists of duplicates and 
desiderata are always welcome, and, if possible, will be inserted in 
the issue for the month following that in which they are received. 
It may be added that only notices sent to us for publication © 
appear in the exchange pages. 
THE EMERGENCE OF THE CERURAS. 
By T. A. Cuapman, M.D. 
In the ‘ Entomologist,’ vol. xxiii. pp. 91—94, I referred to this 
subject in connection with the remarkable habits of H. mil- 
hauseri, especially with a view to questioning whether some 
beginnings of the structure and habits of that species might not 
exist in the Ceruras. Last spring I obtained some pupe of C. 
vinula, in hope of learning something more; and though I 
observed little that is not well known, I may put my notes 
together, as science is so long and life so short, that a slight 
advance may be worth maintaining. I was only successful in 
observing two or three emergences, and only one of these at what 
was the critical moment, and in this case I interfered so as to 
spoil the observation, the chief further knowledge gained being 
that I had so interfered. 
Some pupe are able to turn round in their cocoons, but I 
think the majority have their backs to the tree and their fronts to 
