_Butterfly._--This insect, which may easily be distinguished from all its allies by its peculiar markings, is found in Florida and Texas, and is widely spread over the Antilles and tropical America. We know nothing of its life-history. A number of closely allied forms, reckoned as species, are known from the Antilles and Central America. They are so closely related to each other that it is believed that they are possibly only varieties or local races. We cannot, however, be sure of this until the test of breeding has been applied. Expanse, 1.90-2.10 inches. Genus MEGANOSTOMA, Reakirt (The Dog-face Butterflies) "Let me smell the wild white rose, Smell the woodbine and the may; Mark, upon a sunny day, Sated from their blossoms rise, Honey-bees and butterflies." JEAN INGELOW. _Butterfly._--Closely resembling those of the following genus, _Colias_, from which they may be readily distinguished by the more acutely pointed apex of the fore wings and by the remarkable coloration of these wings in the male sex, the dark outer borders being disposed upon the lighter ground-color so as to present the appearance of a rude outline of the head of a dog, whence these butterflies have sometimes been called the "dog-face butterflies." [Illustration FIG. 146.--Neuration of the genus _Meganostoma_.] _Egg._--Fusiform, strongly pointed at the apex, broader at the base, the sides marked with a few delicate ridges, between which are numerous cross-lines. _Caterpillar._--Elongate, cylindrical, the head relatively small, striped on either side by a whitish lateral line, each segment having a transverse darker line. They feed upon leguminous plants. _Chrysalis._--Pointed at the head, convex on the abdominal segments on the dorsal side, with a decided hump on the thorax. The wing-covers unite to form a moderately deep carinate, or keel-shaped, projection on the ventral side, not, however, nearly as large as in the genus _Catopsilia_. But two species of the genus are found within our fauna, one widely distributed throughout the Southern and Southwestern States, the other confined to the Pacific coast. (1) =Meganostoma eurydice=, Boisduval, Plate XXXVI, Fig. 1, ♂; Fig. 2, ♀ (The Californian Dog-face).