450 ENTOMOLOGICAL SOCIETY 



SPHINGIDJE. 



Dilophonota ello Linn. Not uncommon in 1890 and fully as 

 common in 1900. Larvae on Euphorbia heterophylla. In 

 1890 I met with the brown form of the mature larva only; in 

 1900 with the green form only. Moth occasionally at light. 

 (Larva, Ent, Amer., vi, 143). 



Dilophonota obscura Fab. Rare ; the larva feeds on certain 

 of the twining Asclepiadaceaa and is colored remarkably like its 

 food plants. 



Stage IV. Head rounded, flattened and held out flat, vertex under joint 

 2; clypeus low and with the paraclypeal pieces shield-shaped; green, 

 white granular; an upright whitish line from before the dark ocelli to the 

 subdorsal line of the body ; width 2.6 mm. Body long and slender, feet 

 short, uniform; cylindrical, slightly narrower posteriorly, of normal 

 shape for the genus. Horn long, directed obliquely backward. Whitish 

 green with white granules, rounded, produced, tipped with pile, making 

 the surface rough. A moderate white subdorsal line from joint 2 ante 

 riorly to the horn, which it curves up to meet. Horn whitish green, pink 

 at base where it touches the subdorsal line. Anal flap elliptical ; anal leg 

 plates long triangular, reaching far beyond the anal flap. Spiracles white 

 with black central rectangle. 



Stage V. Head round, elongate, the vertex under joint2; clypeus half 

 way to vertex, shield-shaped. Gray green, longitudinally striped with 

 fine black dots, a white band from antennae to vertex of lobe ; width 4 mm. 

 Body slender, normal, anal plate elongate and rounded, anal leg shields 

 long triangular, the lower anterior corners rounded, extending well beyond 

 the plate. Horn nearly absent, only a short, thick cone. Greenish gray, 

 finely peppered black and white on a green ground; an obscure, broad 

 flesh-colored whitish subdorsal band from joint 2 to the horn; a narrow, 

 sharp, black dorsal line on joints 2 to 4, and gray-black segmentary dots 

 on 5 to ii. Skin granules obscure. Feet neatly banded black, white 

 gray-green, black, white, except the anal pair. Later this marking 

 becomes obscure, but above it the bases of the feet are folded, the con 

 cealed part yellow, edged below by the upper black band and a bluish 

 white space with black spots, above by a narrow black line. Tho 

 racic feet pale, narrowly twice annulate with black. Horn-cone dull yellow, 

 olivaceous black at the base and surrounded by a whitish ring. Spiracles 

 brownish with a white dot above and below. With growth the larva 

 becomes very like wood, a dull mottled brown. 



The usual warning mark of the genus in the thoracic dorsal incisure is 

 absent here, but the highly-colored bases of the abdominal feet serve the 

 same purpose. A larva which I disturbed fell to the ground and rapidly 

 closed and unclosed its feet, thus exposing the yellow bands. 



Pupa under a net in the sand, brown, striped with black, much as in 

 the other species. 



