258 THE CANADIAN ENTOMOLOGIST. 



Third larval stage. — -Head as before; tubercles on 2, 3, 4, 5, 6, 7, 8, 

 9, 10, II and 12 are hairless and of a bright orange colour. The body 

 is brown on dorsal side and brown mottled with green on ventral side. 

 Scent organs yellow and slightly larger than before. 



September 29 — Diameter, 4.10 mm.; length, 18. mm. 



October 



Fourth larval stage. — Head as before ; body smooth, ventral side 

 light green mottled with brown ; dorsal side slightly yellowish on seg- 

 ment 2 round scent organs ; from 2 to 1 2 the segments are in colour, — 

 in the centre of each a black line in which are four yellow spots, two on 

 each side ; on each side of the black line there is a narrow bluish line ; on 

 the outside of these is a brown line, which is on the joint, and when the 

 caterpillar is not crawling these brown lines are invisible. The r2th seg- 

 ment is bluish mottled with black. Scent organs are yellow. 



-Diameter, 6.00 mm.; length, 25. mm. 



II 6.50 II 



II 6.98 II 



M 7,50 II 



II 8.00 II 



II 9.00 II 



II 10.50 II 



li 10.50 II 



From the 12th of October until the 23rd, it remains the same size, and 

 on the 23rd it attached the 12th segment to a stem of the food plant, spun 

 a web until the web was between the 6th and 7th segments, drawing itself 

 together as much as possible, it was ready to go into the next stage. 



Chrysalis. — Cylindrical, the abdomen tapering, a slight depression 

 between thorax and abdomen, a blunt trigonate thoracic prominence 

 projecting forward parallel with a similar process over each eye ; a slight 

 lateral projection at base of wing-case and a row of subdorsal abdominal 

 elevations, four of which are most distinct, also a row of openings lower 

 down on each side. Colour light green mottled with light brown ; wing- 

 cases same colour, only streaked longitudinally instead of being mottled ; 

 the end of the thoracic projection is a dark brown ; the similar processes 

 over each eye are darker brown. A narrow band of dark brown extends 

 the length of the body on both sides ; from these bands extending along the 

 base of the wing-cases are small elevations, seven of which are very dis- 

 tinct. October 25th : diameter, 7 mm.; length, 27 mm. 



