148 THE CANADIAN ENTOMOLOGIST. 



days. The larva is flat, whitish ; head and sides of the first segment 

 yellowish. Maculae very indistinct and pale yellowish. All of the larvae 

 that I have examined this summer were of this character except in one 

 mine, where with several flat larvae there was one dead cylindrical one. 

 My recollection, however, is very distinct that the first mine that I 

 opened and which was gathered in March from a tree on which it had 

 hung all the winter, contained two pupae and four cylindrical larvae, and 

 the description in my notes made at the the time confirms my recollection. 

 These four larvae became pupae, and I have now by me the imagines 

 which I bred from them, and I can not conceive how my eyes could 

 have deceived me so as to mistake a flat larva for a cylindrical one. Yet 

 I am loath to believe that there are two larval forms in the species, al- 

 though it is well known that there are two in the genus. 



t t Without fascia, but with dorsal and costal streaks. 



24. — L. Argentinotella Clem. Loc. cit. sup., p. $25. 



Dr. Clemens describes the imago of this handsome species, but says 

 that he can give no account of its larva, or food plant. I have bred it 

 from a tent mine on the under side of Elm leaves ( Limits Americana), 

 The larva is cylindrical and yellowish. 



All of my specimens have the white line on the anterior margin of the 

 thorax extended back over the tegulae, and confluent with the basal streak. 

 Dr. Clemens does not mention these markings of the thorax, but they are 

 so variable in many species — sometimes present, sometimes absent — that I 

 have no doubt of the identity of my specimens with that described by 

 Dr. Clemens, as they agree in all other respects, and I have never met 

 with any species which might be mistaken for it. Alar, ex )/± in, Ken- 

 tucky and Pennsylvania. Common. 



25. — L. basistrigella Clem. Loc. cit. sup., p. 321. 



There is some variation in the disposition of the apical dusting, and 

 sometimes it is nearly wanting, and frequently the first dorsal streak docs 

 not quite attain the dorsal margin and is not produced to the base of the 

 wing. Alar. ex. % to nearly J/j in. The larva is cylindrical and makes a 

 tent mine between two veins on the under side of the leaves of White and 

 Chestnut Oaks ( Q. alba and bicolor and prinoides ). Common. Kentucky 

 and Pennsylvania. 



26. — L. Ulmetla. N. sp. 



Face and palpi silvery-white, tuft white intermixed with golden. 

 Antennae silvery-white, the apical two-thirds annulate with brownish. 



