CARL VON HEYDEN. 31 



Cedestis Gysseleniella, Kuhlvv., Heyden (E. Z., 

 1865, p. 105). This is not scarce on fir trees (Pinus syl- 

 vestris) at Frankfort, in the middle of May. 



The moth makes its appearance the beginning of June. 

 (1828.) 



OcNERGSTOMA piNiARiELLA, Z.j argentellaf Heyden (E. 

 Z. 1860, p. 122). The larva feeds in April and the beginning 

 of May, in the needles of the fir {Pinus syhestrls)^ which it 

 eats out from the tip downwards, leaving its excrement be- 

 liind it. Generally, the inner substance of one needle is 

 sufficient for it; but if this is not the case, it enters another 

 needle. At the spot where it leaves off feeding it makes a small 

 hole in the needle for its exit, and then spins some fresh 

 needles firmly and tubularly togethei', forming between them 

 a thin white cocoon, in which it changes to the pupa state. 

 The imago is developed in the middle of June, and we often 

 find it sitting motionless on the needles. 



At the beginning of August I have taken perfect insects, 

 probably of a second brood. Although the larva sometimes 

 occurs very plentifully about Frankfort, it is not all inju- 

 rious. It feeds only on the needles of the previous year. 

 Many years ago I distributed many specimens amongst 

 other Entomologists, under the name of Tinea lowjiven- 

 trella. (1818.) ^ 



Gracilaria hemidactylella, S. v., Heyden (E. Z. 

 1862, p. 360). The larva feeds at Darmstadt on Acer pla- 

 ianoides and Paeudo plat anus, more rarely on Ace?' cam- 

 pestre, at the end of August and beginning of Sep- 

 tember, in a cone formed at the edge of a leaf; when the 

 larva is full grown this cone is fully an inch long. 



Either on the upper or under surface of a leaf in a small 



