Pyra4idae 
VIII. There are represented in our fauna over sixty genera and 
more than two hundred species. We can give our readers 
merely a glimpse into this corner of the field, but trust that what 
they shall see may impel them to undertake for themselves the 
pleasant task of diligent exploration, assuring them that they will 
find here a world of wonders with which to deal. 
Genus ACROBASIS Zeller 
(i) Acrobasis betulella Hulst, Plate XLVIII, Fig. 15, ?. 
This is a common species, ranging from New England to 
Colorado. There are nearly a dozen other species of the genus 
known to occur in our fauna, and no doubt many more which 
have not yet been discovered and described. 
Genus MINEOLA Hulst 
(1) Mineola juglandis Le Baron. (The Walnut Case-bearer.) 
This little moth lives in its larval stage upon the leaves of 
the hickory and walnut. It has the habit of drawing together 
two of the opposite leaves 
attached to the long peti¬ 
ole, and between them it 
builds a case, which is 
quite straight and is com¬ 
posed of silk, attached to 
which is excrementitious 
matter, which is neatly 
and closely applied to 
the whole. In this case 
the larva lives until the 
cooler airs of autumn 
warn it to leave the 
petiole of the compound 
leaf, which will fall pres¬ 
ently, and it then anchors its little case to the twig near by, anc 
in a half-grown state prepares for the cold winds and icy tem¬ 
perature of winter. When again spring sends the sap up the 
branches, and the leaves begin to unfold, it cuts the bands of silk 
which held the case in place, and completing its development 
408 
Fig. 227. — M. juglandis. a , case woven 
between leaves; b, case; c, e, wing of M. indi- 
genella and variety; d, wing of M. juglandis. 
(After Riley.) 
