THE CANADIAN ENTOMOLOGIST. 327 



appearance are now deep black, with reddish bristles from lower lateral 

 and ventral tubercles. The dorsal stripe is pale bluish, indistinct in most 

 specimens. The tubercles are large (i small), shiny black, bristles 

 barbed ; all tubercles about same proportion as before, ii has a shining 

 base. The bristles from i and ii are mostly pure black, but there are a 

 few pale rust-red bristles intermingled. Those from tubercles iii and iv 

 are mostly pale rust-red, but there are also a few black bristles mixed with 

 these. The bristles from the tubercles below the spiracles are pale rust- 

 red. Spiracles small, black. The dorsal tubercles on the two posterior 

 segments bear a few very long bristles as before. Thoracic feet shiny jet 

 black ; prolegs, upper half concolorous with venter, lower half pale, all 

 bearing sparse short hairs. As the larv* increase in size during this 

 stage, the skin loses its deep black colour, becoming more of a blackish- 

 brown, with the venter rather paler than the dorsum. 



On the 1 2th July about ten specimens passed the fourth moult; 

 others on the 13th and 14th. 



Stage V. — Length, 16 mm. Head, 1.5 to 1.6 mm. wide, indented at 

 vertex as before, whole front of face shiny black, with exception of margin 

 of clypeus at sides, which is brown; space on sides of cheek, just above 

 ocelli, pale brownish as before, but now spotted with darker brown ; 

 ocelli black, antennte as before, mouth-parts blackish. Skin of body 

 wholly velvety black. The dorsal stripe has disappeared and is not 

 present in any of the specimens (50). In most of the larvae the bristles 

 from tubercles i and ii are all black, but in a few specimens many of 

 these bristles are dark reddish. Tubercle iii bears mostly black bristles, 

 with some reddish ones intermingled. From tubercle iv all the bristles 

 but one or two are bright rust-red. Bristles from tubercles v and vi are 

 all bright rust-red, as well as those from ventral tubercles. Spiracles 

 small and black as before, almost touching anterior edge of tubercle iv. 

 Thoracic feet and prolegs as in last stage, seta? on all feet short and 

 concolorous with bristles from ventral and lower tubercles. 



On the 1 6th July one larva passed the fifth moult, and on the 17th 

 and 1 8th many others moulted. 



Stage VI. — Length, 25 mm. Head, 2.0 to 2.2 mm. wide, same as 

 last stage, only the pale space above ocelli has larger spots. Body as in 

 Stage V, with no markings. The reddish bristles from tubercle iv and 

 those from tubercles below spiracles are very bright. The bristles from 



