84 THE ENTOMOLOGIST. 



The spike noted in the cocoons of H. piceus is absent from 

 those of H. fuscipes, its place being taken simply by the material 

 of which the nest is composed, being continued from the under 

 side of the grass leaf, round the edge, and then spread over the 

 upper surface of the leaf. From their position these cocoons of 

 H. fuscipes must be peculiarly liable to be submerged by the 

 rising of the water through floods. I find, however, that the eggs 

 in these pouches will hatch if kept entirely under water. Thus 

 cocoons submerged on April 24th had, for the most part, 

 hatched out by May 19th ; there were, however, some of the nests 

 which, on being opened out, were found to contain larvae evidently 

 alive, but not matured. 



The larvae appear to emerge, under ordinary circumstances, 

 about ten to nineteen da3^s after the cocoons are first made, but I 

 expect the period varies according to the warmth of the water, 

 and with other conditions. 



I have, by opening various egg-pouches, had an opportunit)^ of 

 observing that the larvae of //. fuscipes develop gradually, and are 

 capable of motion some time before they are ready to emerge 

 from the nest. The cocoons are also not water-tight, as there is 

 always a considerable amount of moisture in the nests. 



No doubt these cocoons serve as a protection to the larvae, 

 and as the individual eggs are not covered with any strong 

 integument, and the process of development is gradual, the nest 

 must act as a shelter to the young larvae and j)reserve them from 

 their enemies until they acquire sufiicient activity to go in search 

 of food. 



4, Endwell Road, Brockley Rise, Brockley, Oct. 25, 1880. 



PYRALIS LIENIGIALIS, Zell. : A PYRALE ADDED TO 

 THE BRITISH FAUNA. 



By W. Thompson. 



It is with great pleasure I have to record the addition of a 

 new Pyrale to the British fauna. In August, 1879, I captured a 

 moth at light, which I put aside for a dark variety of Pyralis 

 farinalis. In August and September of last season I captured 

 three others, also at light. Feeling convinced they were some- 

 thing new I sent a specimen to Mr. Barrett, who kindly wrote 



