190 Journal New York Entomological Society. [Vol. vi. 



Laterally a green stripe passing from vertex to mouth. Prothoracic horns brown, 

 covered with greenish tubercles supporting a black spine. A greenish-yellow dorsal 

 stripe, becoming triangular on joints 2 and 3 ; it becomes narrow and again widens 

 on joints 6, 7,8 and 9 into a diamond-shaped patch, constricted on joint II, and finally 

 widening on joints 1 2 and 13. A triangular brown patch in the middle of joint 3. A 

 brown spot on joint 6. Joints 7 and 8 ornamented by an oval brownish spot centered 

 green, and surrounded by a circle of minute, greenish tubercles. From the middle of 

 joints 9 to II, a brownish patch like a maple leaf. Across the penultimate joint a 

 longitudinal brownish dash. Lateral parts of larva green, of the same color as leaf 

 of Cottonwood. All legs concolorous with lateral parts. Feet whitish. The green 

 of abdominal parts a lighter tint, and last two joints almost white. Stemapods of a 

 color approachirjg a purple or lilac brown, annulated with greenish-yellow. The ex- 

 tensile part of ou f er third of " tails " of darker shade. Spinose from insertion to tip. 



Stage III. — Noted October nth, larva 15 days old. Length of larva at rest 24 

 mm., of body from head to venter, 18 mm. and of stemapods, 8 mm. The width of 

 joint 2, 3.5 mm. of joints 6 and 7, 3 mm. Head subquadrate, 3 mm. in length and 

 2.5 in breadth. Head brown, face almost oval, brown and of lighter tint at mouth 

 parts. Ground color of face a much lighter brown covered with dark spots. Lateral 

 parts of face tinted brown. Vertex light brown, the same color passing over dorsum 

 joints I and 2. A chocolate brown triangular patch on joint 5, widening on segments 

 6 and 7, and narrowing on joint 8, forming the first, anterior diamond- shaped orna- 

 mentation. The same brown dorsal patch is repeated on joints II and 12, not quite 

 so large. On joint 13 there is more of an elliptical brown dorsal patch, reaching to 

 venter. A yellow border a little broader than the width of stemapod, passes like an 

 ii regular subdorsal line below the brown ornamentation. This line starts at the head 

 and continues uninterruptedly to venter. On joints 3 and 4, this yellow line almost 

 meets with only a trace of brown between. Lateral parts of larva green, exact coun- 

 terpart of Cottonwood leaf, covered by yellowish-white and lilac purple papillse, some 

 surmounted by hairs. A few dark brown papillse on dorsal patches. Thoracic and 

 abdominal legs green like lateral parts. Feet of a lighter tint. Stemapods lilac 

 brown near venter, of liglter tint at the " flagellum," and twice annulated yellow, 

 and spinose covered with setae. Venter and abdominal parts of last three segments 

 whitish. All other abdominal parts of larva conclorous with lateral surface. The 

 spiracles light brown, edged by a tint of green and white centered. Feet quite pilose, 

 hairs fewer in number toward spiracular line. 



Stage IV. — Not observed until nearly mature. October 22d, mature larva 26 

 days old. Length at rest from head to venter, 30 mm. , while in motion 37 mm , of 

 stemapods 9 mm. when undisturbed, and during flagellation 10 mm. This gives en- 

 tire length of 39 mm. at rest. 



Length of head 3 mm. and over, width 3 mm. Width of segment 2, 5 mm., of 

 joint 7, 6 mm., of joint 10, 5 mm. Dorsal abdominal diameter of segment 7, 7 mm. 

 Head subquadrate or nearly so, a triangular patch cm vertex. Color of head lilac 

 brown with a brown spot each side of vertex. Face of lighter tint, lateral parts yel- 

 lowish. Antennae also yellowish. Mouth parts blackish. Dorsal ornamentation of 

 a triangular patch, whitish within and lilac edged, on segments 2 and 3. The median 

 dorsal surface is almost milk white, much as in C. multiset ipta, thus widely separating 



