121 



Thirteenth segment with a similar row of black dots and a 

 terminal black line. 



All the legs green, with black tips and a black dot at the 

 base of each. 



Compared with the larva of Papilio machaon given in the 

 Butterflies of North America, the only apparent difference is that 

 whereas in Mr. Edwards' figure the transverse black lines are con- 

 tinuous and partially enclose the yellow tubercles, in the larva 

 just described the tubercles on all the segments back of the third, 

 break up the transverse line into a series of black spots. Un- 

 fortunately, the immature larva captured by Mr. Henshaw 

 escaped a few hours later, and before I found the second 

 example, but it was apparently identical. 



The particular larva raised had a hard time of it. It attached 

 itself to pupate and spun its band ; but the jolting of the wagon 

 detached it, and it was found at the bottom of the box. I glued 

 the anal segment down and supplied an artificial band. This ex- 

 periment was successful, but when the pupa emerged, July nth, 

 it of course fell to the bottom of the box, having no silken 

 attachment to seize. I again glued the pupa down when it 

 showed signs of emergence, supplying the band, and in spite of 

 all accidents secured a magnificent female imago, on July 25th. 

 Unfortunately, I could not make a drawing of the pupa, which 

 was green, shaded with yellow ; the green obtained most strongly 

 on those parts which correspond to the black markings of the 

 imago, and the yellow to the yellow markings, there being two 

 broad mottled yellowish stripes on the side of the abdomen 

 above. The wing cases were grayish green, having a striated look. 

 The right hand figure of the pupa of MacJiaon in Edwards' Btitt. 

 N. Am., gives a good idea of the pupa if green and yellow be 

 substituted for the shades of brown. The colors changed but 

 little at maturity. 



San Francisco, August 8, 1882. 



