Notes in 1887 upon lepidopterous larve, dc. 599 
to this easy means of distinguishing the sexes, I wanted 
to test my conclusions by experiment. 
Mr. Sidney T. Klein brought a large number of the 
larve of Ephestia kiihmiella to one of our meetings in 
the autumn of 1887. I saw that the supposed testes 
were very distinct, being of a dark brown colour in 
_ these larve. Mr. Klein kindly gave me a large number 
of the larve, and from these I selected a considerable 
number with, and about an equal number without, 
the brown organs. They were separated, and eventually 
males were alone produced from the former and females 
from the latter, so there was no doubt about the validity 
of the conclusion. 
This fact will doubtless be of use to entomologists in 
breeding experiments with certain species. The appear- 
ance of the testes of the larval HE. kiihmiella, from above 
and from the side, is shown in Plate XVIL., figs. 10 and 
9 (both x 9). It will, however, be found that the organs 
are often somewhat asymmetrical, one being rather 
behind the other. In the movements of the larva the 
skin glides backwards and forwards over them to a very 
considerable extent, producing a very peculiar and 
characteristic appearance. The testes in fig. 10 are 
rather more separated than in the normal larva, owing 
to the application of slight pressure. 
The presence of these bodies must have been observed 
by every entomologist ; while every morphologist knows 
that the testes oceupy such a position, although unaware 
that the organs are visible in many living larve. The 
object of this note is to bring together the knowledge 
obtained by two different classes of observers. 
EXPLANATION OF Puates XV., XVI., & XVII. 
Illustrating Mr. E. B. Poulton’s paper, ‘ Notes in 1887 
upon lepidopterous larve, &c., including a complete 
account of the life-history of the larve of Sphinx 
convolvuli and Aglia tau.’ 
Puarte XV. The ontogeny of SPHINX CONVOLVULI wp to the end 
of the 3rd stage :— 
Fie. 1, x 9. The ovum of S. convolvuli, as seen from above. 
This ovum appears to have been somewhat smaller than the 
