90 THE CANADIAN ENTOMOLOGIST. 



L. Fitchella Clem. 



This species makes a mine on the under side of leaves of various 

 species of Oaks, which is scarcely, if at all, distinguishable from the mines 

 of L. basistrigella Clem. It is roomy, tentiform, elliptical or nearly cir- 

 cular, and pale ochreous yellow. 



Formerly, before I had seen L. quercitorum Frey & Ball, and' trusting 

 to the published description of that species, I suggested that it was pro- 

 bably identical with Fitchella. I have since then bred it, and though 

 they are more closely related than either is to any other known American 

 species, yet they are quite distinct. Fitchella connects argentinotella Clem, 

 with quercitorum, though the resemblance of the species is by no means 

 close, and it is nearer quercitorum. It is less golden than argentinotella, 

 less brownish golden than quercitorum; argentinotella has four, quercitorum 

 three, and Fitchella two silvery white dorsal streaks ; in all three the first 

 dorsal is the largest, but it is much larger in Fitchella than in argentinotella 

 and still larger in quercitorum ; in argentinotella this first dorsal is nearly 

 triangular, in the other two species its upper or anterior edge is rounde d 

 and the apex produced backwards so that the posterior edge is concave. 

 The mine of quercitorum is larger and of more irregular shape than that 

 of Fitchella, which resembles that of argentinotella, but is larger. Fitchella 

 and argentinotella are of about the same size and smaller than quercitorum. 

 There are other differences, and I have only alluded to the most striking. 

 In each there are five silvery white costal streaks similarly placed and of 

 nearly the same size. Dr. Clemens bred it in Pennsylvania, and I have 

 bred it in Kentucky, and have also received it from Texas. Argentinotella 

 is very abundant in Kentucky, but quercitorum I have met with only in 

 Colorado. 



L . coryliella C h am. 



Either by a slip of the pen or by a typographical error, the name of 

 this species is sometimes mis-printed — sometimes coryliella, sometimes 

 corylisella. Coryliella is the name intended, though perhaps it is too near 

 corylella H. Sc, coryli Nic, and coryifoliclla Haw. The statement in the 

 original account, Vol. 3, that it only differs from guttifinitclla Clem, by 

 having one more dorsal streak near the base is too broad. That is the 

 most striking difference, but there are others more minute. This dorsal 

 streak is there said to be dark margined internally ; it should read 

 externally. The species mentioned v. 3, p. 166, as mining leaves of Water 



