In my own collection I labelled a form in which a slight dentation of the terminal band on primaries was perceptible (and which in this respect agreed with Boisduval's figure in the Species General, and with Abbot's of fuciformis) as H. diffinis. It differed from tenuis by a greater breadth of band, a perceptible apical stain, a somewhat brighter or ore yellow haired body. Whether this was Mr. Strecker's Aettira, I Knew not, since I was unacquainted with this author's work, having seen only his numbers on occasion.