PAPILIO III., IV., V. 



3'cllowisli ; 2 ha.s a narrow arched chitinous frontal ridge, the corners rounded ; 

 close to the back of thi.s ridge i.s the orifice through which the scent organs are 

 protruded at will, long, slender, tapering to a blunt point, when fully extended, 

 and bifurcated at base, the color orange-red ; (the larva at every stage from the 

 efff has the use of these organs) ; on either side of 4 a sub-oval or pyriform 

 o-reenish-yellow, or partly ochraceous patch, edged by a fine black line ; on the 

 outer part of this a heavy black ring, rounded or oval, enclosing a purple spot, 

 and toward dorsum a black bar ; the inner extremities of these patches are sep- 

 arated across dorsum by a space measuring .16 to .18 inch; 5 is edged on the 

 posterior side by yellow, and the front of 6 has a black band restricted to dor- 

 sum • on 4 are two purple spots or dots, one on either side dorsum near the 

 patch ; on 5 four spots in line near the posterior edge ; on 8, 9, 10, 11, four to 

 each, those on 8 small, sometimes partly or wholly obsolete ; on 12 two sub- 

 dorsal, small ; on 6 to 12 one to each segment below the spiracles, small ; head 

 rather square, flattened in front, the top a little depressed, the vertices rounded ; 

 color brownish-pink. (Figs./, III., j, f, XIII.) At about seven days before 

 pupation the green becomes more yellow and a dull shade of it covers dorsum ; 

 and within twenty-four hours the whole body changes to chocolate-brown, 

 specked and mottled with grayish on segments after 5 and along base before 5 ; 

 the purple spots retain their hue. (Fig. /'-, III.) Suspension takes place at one 

 to two days from this change of color and pupation from one to two days later. 

 From fourth moult to pupation about ten days. From laying of egg to pupa- 

 tion, in August and September, 32 to 38 daj-s. 



Chrysalis. — Length of several 1.3, 1.4, 1.45, 1.48 inch, the larger being fe- 

 male ; greatest breadth 1.3, 1.4, 1.44 inch ; cylindrical, thickest at 5 and 6, the 

 abdomen tapering rapidly ; head-case long, compressed at top transversely to an 

 edge ; the projections prominent, divergent, p3'ramidal, the edges raised into 

 corrugated and thickened ridges, the tops rounded, the incision between them a 

 right angle, with a small tooth on either side near the angle ; the small projec- 

 tions at side of head pyramidal, with thick, rough edges ; the mesonotum prom- 

 inent, but variable in length and thickness, directed forward, blunt and corru- 

 gated at end and on anterior side ; two sub-dorsal rows of tubercles from 4 to 

 13, largest on 8, 9, 10, the rest small, on 6 and 7 nearly or quite wanting ; below 

 these another row on either side, small, from 4 to 13 ; whole surface corrugated ; 

 color variable, some examples being light or wood-brown, striped longitudinally 

 on sides and dorsum with dark brown ; others ai'e very dark throughout, and 

 some are green over wing-cases, sides and entire dorsal area, the abdomen light 

 brown, or green only about the head and sides. (Fig. ff, III.) 



