[FLETCHER & GIBSON] SOME SPECIES OF CANADIAN LEPIDOPTERA 67 
the diamond is only faintly traceable. The medio-dorsal stripe and the 
upper stripe of the lateral band from the mouth parts, up the head, 
and across segments 2, 3, 4,and 5, and 11, 12 and 13, are very con- 
spicuous, as also are the anterior third of the dorsal diamonds, and a 
white infrastigmatal band which includes the outside of the two pairs of 
prolegs. The markings on the ventral surface are more distinct than 
those on the dorsum. Spiracles black, lying on the upper stripe of the 
substigmatal band, which is swollen and forms a stigmatal fold. 
Between this and a clear well defined double medio-ventral stripe is a 
single whitish lne, which runs down on to the prolegs, and joins the pale 
line of the medio ventral stripe ,of that side. Anteriorly, it meets in 
the same way on the thoracic feet, and is noticeable on all three pairs. 
These four stripes might be described as two double bands, the upper 
substigmatal, containing the stigmata in its upper line, and the ventral, 
the lower line of which is separated medio-ventrally from the corre- 
sponding line of the opposite side by a narrow reddish brown thread. 
Tubercles all black, inconspicuous, with very short blunt bristles. 
Thoracic feet whitish, tipped with brown; prolegs white blotched with 
brown. Anal segment white at sides, dark brown in centre, but striped 
by the upper and lower lines of the lateral band which run across it. 
Stage IV.—Length 14 mm. Head 1.3 mm. wide, round in outline, 
slightly bilobed, flat in front, whitish brown with a wide black band 
across the cheeks. Between the band on each cheek there are numerous 
small spots of brown, and there is also a row of the same spots below the 
band, running from the posterior ocellus to back of head; mandibles 
reddish; antenne pale; hairs on face short and pale reddish; ocelli 
black. Body much the same as in Stage III, mostly dark above and 
light beneath. Tubercles small, white, hairs short and pale. Spiracles 
black. Stripes and bands not so conspicuous as before. The diamond 
shaped marks on dorsum, similar to last stage, but rather darker; the 
posterior half lighter. The ventral stripes are the most conspicuous. 
The thoracic feet are pale, with a few black dots. 
Length of mature larva 21 mm. 
On the 18th June a number of the larve entered the earth and 
by the 20th had changed to pupæ. The larva makes an earthen cell 
and changes to pupa within this. The earth is held together by slender 
threads of silk. 
Pupa—-Length 8-9 mm., width at-widest part 2.6 mm., shiny 
almost burnt umber in colour, pale, of a yellowish, tinge in segmental 
folds of abdomen. Thorax wrinkled, abdomen minutely pitted. 
Cremaster reddish-brown bearing at the end two stiff curved spines, and 
