166 THE CANADIAN ENTOMOLOGIST. 



difficult to rear. It eats voraciously for a few days, and then remains 

 quiet without appearing to eat at all for several days. 



A larva precisely like it, but in a different blotch mine, inhabits the 

 leaves of the Black Oak ( Q. i/icifo/ia?). 



Another like it, but with the mine a little different from the last, 

 inhabits oaks of the Willow Oak group. Another still inhabits leaves of 

 the Beech (Fagus ferruginca). 



Still another in the leaves of the Sugar Maple (Acer saccharinum). 



Another (two others?) similar but different, mines the leaves of differ- 

 ent species of Desmodium. 



I have never known one of them to enter the pupal state, though I 

 have kept them nearly two months in the larval state, in which condition 

 they still remain alive in the dead leaves, as if they would hybernate as 

 larvae. The Black Oak species and that of the Desmodium construct 

 little circular depressed cocoons like those of L. coiyliella, &c, in which 

 the larvae are reposing. (The Desmodium larvae are distinct from the 

 others, and may possibly produce a Leucanthiza or some other allied 

 genus). I think there can be but one brood in a year, and that larvae 

 found in July continue to be larvae until the next spring. 



I have met also with the following larvae of the second (flat) group 

 and mining the upper surface of the leaves. Possibly some of them may 

 prove to be the same with species already described, but I scarcely expect 

 it. Most, if not all, are new species. One mines the leaves of the 

 Chestnut ( Casianca). 



Two species, if not three, mine those of oaks of the Willow Oak group. 

 One mines those of the Water Beech ( Carpinus Americana), and also of 

 the Hornbeam or Ironwood (Ostrya Virginica). 



Of the first (cylindrical) group there is the species (perhaps two 

 species) mining leaves of the (Helianthus) Wild Sun Flower. 



A species which may prove to be L. crataegella mining leaves of the 

 Wild Red Plum (Primus Americana). 



And a species which is probably L. basistrige/la, mining the leaves of 

 Black Oaks (Q. i/icifo/ia, &c.) The mine and cocoon are the same, with 

 those of L. basistrigella on the White and Chestnut Oaks. 



Also a mine on the upper surface of Haw leaves (Crataegus ) which 

 seems to be identical with that of L. virginiella on the Ostrya virginica. 



