THE CANADIAN ENTOMOLOGIST, T 



of the head. Width 1.3 mm. Body rough and tuberculated, a pair of 

 short subdorsal tuberculated processes on each joint except joint 2, those 

 on joints 3, 12 and 13 the largest, those on joints 4, 6 and 11 next in 

 size, the others all smaller ; other similar smaller tubercles in a double 

 dorsal line and two lateral lines, besides numerous small granulations. 

 Colour black with a dorsal white patch on joints 8-10, reaching down the 

 sides on joint 9. All the tubercles and granulations are dull yellowish, 

 more especially on joints 2-4. The larva builds no perch in this stage. 



Fou7-th stage.— Yi&di.^ as before, densely tuberculate, the tubercles 

 larger laterally and especially so at the vertex. Colour blackish-brown, 

 darker centrally, the tubercles pale. Width 1.8 mm. On the body are a 

 series of round wart-like prominences covered with tubercles, the sub- 

 dorsal ones on joint 3 produced into a pair of horns i mm. long, while 

 those on joints 4, 11, 12 and 13 are larger than the others. Body 

 densely tuberculate, black with a dorsal white patch as before. All the 

 tubercles are pale brown. Some dorsal cream coloured shades on joints 3 

 and 4 and a black dorsal dot on joints 8 and 9 each. Indications of a 

 white substigmatal band, especially on joints 11-13. 



Fifth stage. — Head bilobed, the apices produced, rough and tubercu- 

 lated as if covered with warts, higher than wide and depressed along the 

 median suture. Colour dull olive-brown, the excresence paler ; ocelli 

 black ; mouth dark. Width 2.8 mm. The body is enlarged dorsally at 

 joints 3, 4 and 6 ; on joint 3 is a pair of subdorsal horns, roughly 

 tuberculated, 2 mm. long. On joints 4, 6, 11, 12 and 13 are small sub. 

 dorsal tubercles, the largest on joint 13, and close together. A number 

 of small, round, smooth, elevated bluish dots, most conspicuous dorsally 

 on joints 5-7 and 11- 13. General colour olive-brown, shading into pale 

 pinkish on joints 2-4, but still partly mottled with the ground colour. 

 On the hump on joint 6 it is pale olive-yellow, except in a dorsal band 

 where the ground colour prevails. A large patch, nearly white on joints 

 8-10 dorsally, but on joint 8 posteriorly and joint 9 laterally, it contains 

 a few streaks of the ground colour. An irregular, broad, white, substig- 

 matal band on joints 5-13. Spiracles black, pale centrally and encircled 

 by v,'hite. The processes on joint 3 and tubercles on joint 13 are 

 blackish-brown ; venter mottled with whitish with a medio-ventral nearly 

 white line. 



Anal feet elevated in repose and the body humped, the head turned 

 to one side. The larva usually rests on the stems of its food-plant. 



