40 IN" MEMORIAM. 



on the Taiinus in September: the entire mine is of irregular 

 form and about half an inch across. The larva winters in a 

 whitish cocoon in the lenticular portion of the mine. Some- 

 times the so different-looking mines of Complanella and 

 Dodoncea occur in the same leaf. The imago makes its 

 appearance in the first half of May. 



Although I have been unable to find any satisfactory 

 character to distinguish the perfect insect from T, com- 

 planella, there can be no doubt that it is really a distinct 

 species. Dodoncea is always smaller than the average size 

 of Complanella y though individual specimens of the latter 

 may be found just as small. 



I have for many years distributed this species amongst 

 Entomologists under the name of T. Frausella, and it is 

 also mentioned under that name in the Entomologist's 

 Weekly Intelligencer for 1858, vol. iv. p. 175. (1846.) 



Lyonetia frigidariella, Heyden (E. Z. 1861, p. 38). 

 I found the larva at the end of July on smooth leaved 

 willows by the Lake of St. Moritz in the Upper Engadine; 

 it mines lai-ge, long, brown blotches in the leaves. 



When full fed it spins on the underside of a leaf a cocoon 

 similar to that of Cemiostoma scitellaj but larger, which it 

 places along the mid-rib, and the tip and base of the leaf are 

 slightly drawn towards each other. The elongate pupal 

 cocoon has a large four-lobed covering, which is not so 

 thick, and therefore more transparent than in (7. scitella. 

 The perfect insect makes its appearance the beginning of 

 August. 



As the pupa state is not passed in a hammock as in 

 Lyonetia j)r^''nifolieUa and L. ClercheUa, but as in Ce- 

 miostoma scitella, Laburnella, and Susinella, beneath a 



