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.

Under side of primaries pale orange-fulvous at base, and in the Pshaped spot of cell; also along the branches of median; rest of wing pale buff, except hind margin and apical area, which are ferruginous ; on the sub-apical patch two silver spots, and the four or five uppermost submarginal spots are silvered.

This species varies in color from very pare 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. Sometimes only the second dorsal and costal will be dark margined, and these not very distinctly; and sometimes all, including the basal streak, will be distinctly dark margined.

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 numerons smail 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. Since then I have been enabled to examine them with a more powerful microscope,and I think they are entirely new to science.

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 lelt 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. To distinguish these species from Hadena is certainly difficult.

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 charecterized 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. In the larva state it is aquatic and much esteemed as fish-bait by fishermen, who call it a “crawler,” “dobson,” etc. Indeed, one of the most popular artificial fish-baits is a patent india-rubber imitation of it.