CARL VON HEYDEN. 37 



elongate, thin, white cocoon, in which it assumes the pupa 

 state. In April I had found in the same peat-trenches some 

 larvae, which had eaten their way into the dry Typha stems. 

 Before spinning up, the larva crawls about in a very restless 

 manner. 



The perfect insects come out all through the month of 

 June. They sit with the wings flat and narrow, but slightly 

 roof-shaped. When disturbed they often slip about with 

 their backs downwards, without flying. (1862.) 



Laverna decorella, Steph., Mompha divisellaj Heyden 

 (E. Z. 1861, p. 37, 1862, p. 362). The larva lives in a 

 more or less rounded, gall-like swelling, sometimes as large 

 as a pea, on the stem of Epilobium alpinurtiy generally at 

 the base of the leaf-stalk. One often finds several galls on 

 one stem. It changes to the pupa state in an elongate, parch- 

 ment-like whitish cocoon, within the very confined space 

 of the gall ; from the upperside of the gall a portion of the 

 cocoon projects tubularly through a small hole, through 

 which the perfect insect makes its escape. A gall found in 

 the middle of October on the Bergstrasse at Auerbach, 

 produced a moth the day following. It is probably double- 

 brooded, and may also occur near Frankfort and on the 

 Taunus mountains. (1860.) 



At the beginning of August I found the larva and several 

 pupag in the former locality on the Bergstrasse at Auerbach. 

 The moths appeared from the middle to the end of August. 

 It would seem, therefore, that in this species the time of 

 appearance differs. 



I have also found empty galls in the Frankfort woods and 

 on the Taunus ; and the larvae at Badenweiler in the Black 

 Forest. (1861.) 



