224 THE CANADIAN ENTOMOLOGIST. 



September — just the period when A. sple?idor if erella \s cutting out its cases, 

 crawling over the leaves, and fixing its byssus to the limbs and trunks, as 

 Dr. Packard's species did. 



On the other hand, some of the minuter markings, towards the apex of 

 the wing, are not mentioned by Dr. Packard, nor shown in the figure. 

 The form of the case in the figure is by no means accurate, though that of 

 the larva is. And the alar ex. is stated to be .20 inch, whilst I have 

 never found it to exceed two lines. 



2. A. lutifiuella, Clem. Op. cit., p. 209. 



I have found the larvae mining the leaves of Hickory trees, but have 

 not yet succeeded in raising them from the mines. According to Dr. 

 Clemens' description, it is a little larger than A: sple7idorij "erella, and 

 resembles more closely the next described species. Kentucky and Penn- 

 sylvania. Not common. 



3. A. Ella. N. sp. 



Head silvery white, tinged with yellowish. Antennae pale fuscous 

 above, silvery beneath ; thorax and about the basal one-third of the wings, 

 silvery gray, remainder of the wings golden brown or dark brown, accord- 

 ing to the light, sometimes appearing reddish golden. A rather large 

 costal white streak in the dark part of the wing, just before the middle, 

 with an indistinct reddish or yellowish spot before it, within the costal 

 margin, and a triangular white dorsal streak nearly opposite, but a little 

 before, and a costal faint yellowish indistinct spot behind it. A trian- 

 gular, velvety, black, apical spot with its base towards the ciliae, a small 

 silvery spot at its apex, and a narrow silvery line on each of its sides; 

 ciliae silvery. Under surface and legs silvery white. Alar ex. about i 

 inch. (Smaller than A. splendor if erella). Larva and food plant unknown. 

 A single specimen found in its case attached to the bark of an Oak tree. 



Named in honor of a lady friend, who, like our "micro," is both "petite" 

 and pretty. 



Dr. Clemens mentions the larvae of two other species, one of which 

 mines the leaves of the Ironwood ( Ostrya Virgi/iica), and the other mines 

 different species of Willows (Salix). I have met with both mines, but, 

 like Dr. Clemens, I have never seen the imagines, unless A. Ella should 

 prove to be one of them. 



These are the only known species of the genus. 



