Angynnis Hippolyta.

Male.—Expands 2 inches.

Upper side fulvous, obscured by brown at bases of wings ; the discal area of each wing lighter than elsewhere; the black markings rather heavy; the marginal lines more or less confluent; the silver spots of second row indicated on upper side by oblong spots of a pale color.

L. argentinotella Clem.

This species varies in color from very pale golden yellow to reddish saffron, and in size from about one-fourth of an inch to about one-third. Likewise as to the size and distinctness of the marginal streaks on the fore wings and as to the dark margins of these streaks.

About the last of March my friend, Mr. Allen Curtiss, a botanist, brought me some Orange twigs infested with the Orange Scale Insect (Aspidiotus Gloverii). On examining them with my pocket lens, I was surprised to see numerous small black mites running in and out of the scales, and which no doubt prey upon the eggs of the Scale Insect, and probably prevents their increase.

In the collection before me are the following species referred to Polia, but in the absence of a series of the European forms I am not clear that they are finally to be left in this genus. I have separated under the name of Pachypolia atricornis a stout and shaggy species, taken by my friend, Mr. Westcott, which has strongly pectinated antennæ, a character not accorded by Lederer to the European species, but one which is only doubtfully of generic value.

The paper relates to the development of one of the most singular and interesting of North American insects–the largest of the Order Neuroptera. In its perfect state this insect is a great, clumsy, nocturnal fly, popularly called Hellgrammite, and characterized by the jaws of the male being converted into a pair of long, curved, cylindrical and tapering prehensile organs, like the finger of a grain-cradle.