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THE CANADIAN ENTOMOLOGIST. 
MICRO-LEPIDOPTERA. 
BY V. T. CHAMBERS, COVINGTON, KY. 
Continued from Vol. IIL., page 224. 
GRACILLARIA. 
_ Tue species of this genus bear some resemblance—especially the smaller 
species—to Lithocolletis ; but they may be distinguished by the attitude 
in repose in most species, and by the developed maxillary palpi in all. 
They usually sit (especially the larger species, for I have not observed it 
in some of the smaller ones), with the anterior part of the body elevated 
upon,the anterior and middle legs, whilst the posterior legs are applied to 
the sides of the abdomen, the apex of which touches the surface upon 
which they rest. In some of the smaller species, the maxillary palpi are 
small, and sometimes almost concealed by the labial palpi. This is the 
case in Gracilaria robiniella (Parectopa robiniella Clemens), and G. lespe- 
desefoliella (P. lespedezæfoliella Clem. ), upon which Dr. Clemens erected 
the genus Parectopa, as not having any visible maxillary palpi. I have 
found the maxillary palpi distinct, though small, in G. robiniella. CG. 
lespedezæfoliella 1 have not seen ; but from Dr. Clemens’ description, it 1s 
very closely allied to G. robiniella, and no doubt has the same structure. 
But the genus is by no means a homogeneous nor a distinctly limited 
one. The species differ in many respects as to structure, as well as style 
or pattern of ornamentation, and habits of larve and pupæ. 
The genus Coriscium was erected to include certain species having the 
second joint of the labial palpi tufted. But, as Mr. Stainton has well 
remarked, there is considerable variation among the species in this re- 
spect, and the genus seems to pass almost insensibly into Gracilaria. 
The only material point of difference between Gracillaria and Parectopa 
was the supposed absence of maxillary palpi in the latter genus, and that 
was a mistake. 
Herrich-Schaffer divides the genus, constructing a new genus, //zspz/- 
apteryx, for the smaller species, (and in which no doubt he would have 
included the Parectopa of Dr. Clemens), but which does not seem to me 
to be at all a natural division. And lastly, Zeller divides the genus into 
two sections, in one of which the discal cell gives, off nine veins to the 
margin, whilst in the other it gives off only eight veins. This appears to 
