1909.] 153 



Tt will be noticed that Meyrick (Z. c.) gives the head as "brown," 

 instead of orange-ochreous as I have found it to be, and the "dots " 

 as " darker," which is not correct of the tubercles, though it holds 

 good of the spiracles. 



My notes, made at various times, show that the larva forms a 

 perpendicular cylindrical domicile, lined with white silk, either by 

 rolling up a leaf and uniting the edges with silk, or, more frequently, 

 by joining together the several terminal leaves of a shoot of Myrica 

 gale. The tips of these leaves are often eaten off evenly all round by 

 the larva, so that the upper end of its domicile looks as though it had 

 been cut off with a pair of scissors. Not unfrequently_, in the autumn, 

 I have found either the anterior or the posterior segments of the 

 larva protruding from the upper end of its domicile in the afternoon 

 (the only period of day during which it has been searched for), 

 and my entry leads me to believe that this attitude has been observed 

 on cloudy, as well as on bright, days. The larva becomes full-fed in 

 the latter part of the summer, passing? the winter unchanged in its 

 hibernaculum of white silk, formed in the middle of a small cluster 

 of shoot-Jeaves of Myrica gale which are spun together with silk, and 

 attached to the end of the twig sufficiently firmly to prevent their 

 being dislodged by the weather or by the growing flower-spikes. It 

 constructs its cocoon of white silk inside its hibernaculum, and pupates 

 therein about April. 



Being anxious to obtain other larvfe for comparison, I collected 

 in the same locality, on April 2nd last, a further good supply of 

 habitations of G. rusticana on Myrica gale, but, when examined on the 

 following day, all were found to be empty with the exception of one, 

 which contained a larva quiescent in its cocoon, preparatory to pupa- 

 tion. This agreed in all respects with the larva described above, 

 except as to the colour of its anal plate, which, although watery pale 

 ochreous anteriorly, was dark olive-fuscous posteriorly. This plate 

 evidently varies a good deal in colour. 



Since the larva, from which my description was made, showed no 



sign of pupating (it ultimately died on April 29th, having made no 



attempt to do so), whilst the other pupated about two days after it 



was brought home, my notes on the pupa were made, on April 16th, 



from the latter, which had assumed that state about twelve days 



previously. 



PUPA. 



Length, 6'75 mm. Greatest breadth, 1'8 mm. 



Moderately broad to the end of the third abdominal segment, then tapering 

 noticeably to the end of tlie seventh abdominal, and rapidly from there] to the anal 



