group never assume the cylindrical form ; and if they assume 

 what I have called the intermediate form, it is still very distinct 

 from that of the cylindrical larva, and is assumed only in the 

 later stages of larval life. Indeed L. cincinnatiella is the only 

 species which, so far as I have been able to learn, assumes a 

 subdepressed or thickened form ; for L. coryliella always retains 

 the flattened, mammilated form, and only approaches L, cincin- 

 natiella in the structure of the head and mouth parts. (See 

 Figs. 1-4). I have always found the larvae of iy. cincinnatiella 



Fig. 1. 



Fig. 1. 

 Fig. 2. 

 Fig. 3. 

 Fiff. 4. 



Fig. 2. Fig. 3. 



Explanation of the Figures. 



Fig. 4. 



Larva of the flat group — ordinary form. 



Head of the same larva. 



Larva of " secondary " form of flat group, L. cincinnatiella. 



Head of same. 



in the winter and early spring, that is, the latest fall brood 

 having the intermediate form, and have had many specimens 

 from such larvae. Usually I have found the larvae of the sum- 

 mer broods in the ordinary flat form ; but occasionally, in the 

 summer, the same mine contains larv« of both forms, for the 

 larvae of this species are gregarious. The only specimens of 

 the larvEe of L. coryliella that I have found in the intermediate 

 stage were found in the fall, and belonged to the last brood of 

 the year. This subject needs further investigation, and I pro- 

 pose to look more closely into it next summer. 



I have not seen the larva3 of any exotic species. Mr. Stain- 

 ton, in his very valuable edition of Dr. Clemens' papers on the 

 Tineina, states, " I doubt much whether we have in Europe 

 anything resembling this second (flat) group." But, if I am 

 not mistaken, Prof. Frey has somewhere stated that it is found 



