Some Notes on the Early Stages, Especially the Chrysalis, of a Few American Sphingidae

E’y. Round, very light green, and perfectly snooth so far as can be seen with an ordinary lens. They are laid singly, and rarely more than one is found upon the same plant. Cateribillar. (See Psyche, v. 2, p. 73-75, for description of the larva, drawn up at the same time.) Ckrysalls. Dark reddish brmvn with a slight dark olivaceous tint on the wings, the edges of the segments darker than the middle; spiracles and tongue black. The body is deeply hollowed at the metathorax on either side of the centre, somewhat constricted at the prothorax, and has a central depressed line and a pit on either side of it upon the front of the fifth and sixth abdominal segments. Metathorax and hind wings not very conspicuous, the former with a transverse backward directed ridge. The tongue is fi’ee except at its bulbous tip, shorter than in M. quinquemaculala, and slightly incurved on its downward trend; its extreme tip is placed at one-third the distance from the head to the tip of the body and halfway between the front of the head and the tip of the wings, while in M. quinquemaculala it is at half that distance. The tind legs reach the tip or nearly the tip of the wings which extend over four abdominal segments. Before the spiracles on the 5th-7th abdominal segments there is a slit five or six times as long as the spiracles, the posterior edge raised and lipped, and the top ridged above, the whole being black, and undoubtedly serving for the movement of the pupa in reaching again the surface of the ground; precisely the same thing occurs in other species of Macrosila. The head, thorax, and appendages are quite smooth, being only faintly wrinkled, except the tongue which is roughly wrinkled; the abdominal segments are profusely punctate anteriorly, punctate or rather pitted and wrinkled in the centre and, at least on the 4th-7th segments, very minutely and delicately punctate posteriorly; the last two segments are very deeply erose; the cremaster obtusely conical, tranversely compressed, having two short points with their inner edges diverging, but their outer edges nearly parallel. Length 5 ram. breadth 4 ram.