CARL VON HEYDEN. 35 



furnished the perfect insects the beginning of August; one 

 even made its appearance in October. I also saw some of 

 the perfect insects on the wing early in July. 

 . I. thought I had collected a tolerable supply of this pretty 

 species, but many of the leaves which were folded together 

 in the same way produced only Te?'as Abildgaardana, 

 (1862.) 



CoLEOPHORA coNSPicuELLA, Zell., Hcyden (E. Z. 

 1863, p. 345). The larva, which is full fed in the middle 

 of July, occurs locally at Frankfort and Darmstadt, on 

 Centaurea Scahiosa. Before it fixes itself for its change 

 to the pupa state, it often crawls about for a long while, and 

 far away from its food plant. 



The perfect insect generally makes its appearance in the 

 first half of August ; though one may still find feeding 

 larvas singly at that time. (1842.) 



CosMOPTERYX ZiEGLERELLA, Hb., Hcydcn (E. Z. 

 1860, p. 122). The larva mines the leaves of the hop 

 {Stimulus Lu'pulus)y from the end of July to the middle of 

 August. The mines are mostly linear, but divided into 

 several branches, and are pale brown. They always run 

 along the ribs on the upper side of the leaves, and are in- 

 ternally carpeted with white silk. The larva sometimes 

 quits its mine, and enters the leaf at another spot. 



The larva passes the winter outside the mine, in a flat, 

 narrow, thin, white cocoon, and changes in the following 

 spring to the pupa state, and the imago makes its appearance 

 the beginning of June. At Frankfort it only occurs in 

 isolated localities, but is there very abundant. 



According to its habits it is never likely to become in- 

 d2 



