328 THE CANADIAN ENTOMOLOGIST. 



tubercles i and ii in most specimens are all black, but some have one or 

 two reddish bristles also. Tubercle iii has mostly black bristles, but also 

 a few reddish ones. Tubercles all black as before, bristles barbed. 

 Spiracles black. Thoracic feet black, setae mostly pale; prolegs pale 

 reddish, setae concolorous with bristles from subventral tubercles. 



On the 20th July one larva passed the sixth moult, another on the 

 2 1 st, and others on the following days. 



Stage VII — Length, 31 mm. Head, 2.5 to 3.0 mm. wide, slightly 

 smaller than segment 2, rounded, somewhat quadrate, depressed slightly at 

 vertex, black, shiny, flattened in front ; ocelli black, hairs on face all 

 black, with exception of a few pale ones around mouth-parts ; antennae 

 pale at base, dark in centre, and brownish at tip. In some specimens the 

 median suture is pale, also the lower half of the epistoma. Skin of body 

 in many specimens wholly velvety black ; in others, same colour, but 

 shading to grayish-black subventrally. Tubercles all black ; bristles 

 distinctly barbed. Tubercle i small, about one-third the size of ii ; ii with 

 a shining base, larger than iii ; iii, iv and v about same size ; vi smaller 

 than v. Bristles from i, ii, iii and upper half of iv black, from lower half of 

 iv and other tubercles bright rust-red. In some specimens nearly all the 

 bristles from iv are rust-red. Spiracles black, inconspicuous, almost 

 touching anterior edge of tubercle iv. On segments 12 and 13 there are 

 a few long black hairs. Thoracic feet shiny black, tipped with reddish 

 brown ; seta? mostly pale ; prolegs, upper portion shiny black, lower 

 portion and claspers reddish ; setae rust-red. 



The mature larva at rest is 35 mm. long, and when extended, 40 mm. 

 On the 28th July two specimens began to spin their cocoons ; 

 another on the 1st August, and others soon afterwards. 



The cocoon is thin, consisting simply of a slight web of reddish- 

 brown silk covering the pupa, and is enclosed in a leaf or two of the food- 

 plant, which have been drawn together and fastened by threads of silk. 

 Some of the specimens spun up amongst some blades of dry grass which 

 were in the breeding cage. 



Papa. — Length, 22 mm.; width at widest part, 7.5 mm.; black, folds 

 of abdomen faintly dull reddish ; pruinose ; abdomen bears sparse short, 

 thick hairs, and is minutely pitted ; thorax and wing-cases wrinkled. 

 Spiracles dull black, faintly tinged with dark red in centre. Cremaster 

 round, shiny black, terminating in a bunch of about 22-25 capitate dull- 

 reddish bristles. 



