388 



gray tint to which he refers was caused by this abnormal scaling. I have his labeled 

 type ( (? ) before me. The specimens referred by me to sulphurea [Insect Life, ii, 

 324, (1890)] were wrongly identified; they are iadiella Chamb. 



Tischeria clemensella, Chamb. 



Tischeria clemensella, Chamb. Bull. U. S. G. G. Surv.,iv, 98-9. (1878, February.) 

 = zelleriella, Chamb. (nee. Clem.). Ciu. Qr. Jr., Sc, ii, 110. (1875.) 

 = bieolor, Frey. Stett. Ent. Zeit. xxxix, 255. (1878, September.) 

 Since I have had the type of licolor, Frey, I am convinced that this is the species 

 indicated by Chambers under the name clemensella, no other agreeing with his de- 

 scription of the hind wings. They are exactly as he writes [Bull. U. S. G. G. Surv., 

 IV, 98 (1878)]. "The hind wings are also paler and wider; though not nearly so 

 wide, and tapering much more gradually to the acute apex, than in latipennella, with 

 which it otherwise agrees, except that it lacks the yellow tint along the apical part 

 of the costa." 



Tischeria castanella, Chamb. 



I am unacquainted with this species, but it seems to be distinguished by having 

 the abdomen densely dusted beneath with brownish-yellow, a character which also 

 occurs in citrinipennella and clemensella, it is nearly one-third of an inch in expanse. 

 I should have been persuaded that Chambers's description referred to sulphurea, Frey, 

 but I am unable to distinguish any brownish-yellow dusting beneath the abdomen 

 of Frey's type. Chambers, unfortunately, omits to mention the hind wings in his 

 description of castaneceella. 



Tischeria fuscomarginella, Chamb, 



The specimens referred to /itscomar^iweZZa [Insect Life, ii, 324 (1890)] were wrongly 

 identified. The Texan specimen is a 9 of citrinipennella, while the Missouri speci- 

 mens are at present undetermined, though they seem to agree approximately with 

 Chambers's description. I have not yet seen an authentic specimen of fuscomarginella, 

 Chamb. 



Tischeria tinctoriella, Chamb. 



T. concolor, Z., clemensella, Chamb., and tinctoriella, Chamb., are distinguished from 

 the other species of this genus by the dull ochreous color of the fore wings. 



T. tinctoriella may be separated from clemensella by the normal shape of the hind 

 wings, which are not widened at the base, and sharply attenuated from the middle as 

 in the latter species; tinctoriella differs from concolor in possessing a patch of brown- 

 ish-fuscous scales on the upper side of the fore wings at the anal angle. The larva 

 feeds in a blotch mine on the upper side of the leaf, and is well described by Cham- 

 bers as containing a circular nidus streaked with ziczac purple lines, whereas that 

 of concolor strongly impresses the edge of the leaf. Its darker color at once distin- 

 guishes it from the pale hadiella, although the group of gray scales is in the same 

 position near the anal angle of the fore wings. 



I hope that the corrections contained in these notes will make some amends for the 

 too hasty publication of my previous impressions arrived at under difficulties which 

 have been greatly removed by the acquisition of Frey's types. The only three 

 described North American species now unrepresented in my cabinet are castaneceella, 

 Ch3imh., fuscomarginella, Chamb. (under-side miner), and imlvella, Chamb. 



The following tabulation of the oak-feeding species found in the United States 

 may assist collectors to identify their captures by drawing their attention to the 

 peculiarities by which most of them can be easily distinguished. 



A. Hind wings of more than normal width. 



B. Apical cilia of hind wings excised above in <? , entire in 9 . = Coptotriche, Wlsm. 



1. Hind wings broad, abruptly depressed in both 



sexes, gray or grayish = Coptotriche zelleriella, Clem» 



