The muscular strength, very remarkable in the insect tribes, is surprisingly great in the goat moth. The number of muscles in the human body is reckoned at 529; but in this caterpillar, not so large as a man’s finger, there are 4061! Mr. Rennie relates that he once put a goat moth caterpillar under a glass bell weighing nearly half a pound, “yet it raised it up with the utmost ease.” A book weighing four pounds was then placed over the bell, and still the creature made good his escape by raising both book and glass! The name of this insect is derived from its peculiar odor. It is not found in America, although we have several moths partially resembling it, and among others, “_Cossus Macmurtri_.” _Hummingbird Hawk-moth._—The reader is probably aware that the name of sphinx was given to one of the three divisions of insects of the butterfly tribe, from the singular habit of their caterpillars, which raise the upper portions of their bodies in an erect position, and continue thus motionless for hours at a time, resembling, as Linnæus fancied, the statues of the Egyptian Sphinx. These caterpillars produce moths of a peculiar form, not unlike birds in their shape and movement. In England, they are rather rare; but our American species are quite common in some parts of the country. This hawk-moth is one of those insects given to wandering; it has been frequently taken several miles from land in the English Channel, and is observed to take flight sea- ward of its own accord in calm, pleasant days, when there is no wind to compel a movement in that direction. _The Admirable, vanessa atalanta._—Here we have another beautiful butterfly, found on both continents. The caterpillar feeds on the stinging nettle; from the leaves of which it makes itself a little tent, or dwelling, where it leads a solitary life, until at the end of a month it passes into the chrysalis state. _Blue Argus, p. argus_, is not, we believe, found in America, nor is it very common in England. It has a broad band of crimson on its lower wings, while the general color is azure blue. _Marbled Butterfly, p. galathea_, is also, we understand, unknown in America. The wings are black, finely marked with spots of white and yellow. The caterpillar feeds on grass. _Brown Meadow Butterfly, p. janira._—Also unknown in America, it is said.