NOTE ON SUANA CONCOLOR. 301 
larve of this sex do not exceed 120 mm. The larval sex is 
indistinguishable by size until the last instar is approaching 
completion. 
Pupa.—After 7 days as a pre-pupa this is formed within 
a very tough cocoon of grayish silk interwoven at each end 
with the urticating thoracic hairs. The pupa itself is dark 
brown with three yellow rings abdominally. Length, male 
26-30 mm., female 50 mm. The cocoon is softened by a fluid 
prior to the emergence of the imago. 
Imago.—Male: Fore-wings dark red-brown, some pale 
yellowish suffusion along costal margin, and some lighter 
scales along the course of the veins. The hind-wings are dark 
brown. Thorax red-brown, abdomen dark brown, with long 
anal tuft of very dark brown hairs. Antenne bipectinate, 
very broadly on the basal half. Expanse 48-60 mm. 
Imago.—Female : Fore-wings a paler red-brown, the basal 
area slightly darker, and a slightly darker indefinite broad 
band across the middle of the wing, with some darker colour- 
ation from outside this bar below costa to apex broadly. 
Near outer edge of sub-basal dark area is a prominent white 
lunule. The hind-wings are pale brown. The thorax and 
abdomen coloured as fore- and hind-wings respectively. 
Antenne minutely pectinate. Expanse 106 mm. 
Life Cycle—Kgg 14 days. Larva 12-16 + 21-24 + 25 + 
58-78. In all 119-140 days. Pupa: (male) 29-33 days ; 
(female) 24 days. Total 162-178 days. These figures apply 
to the brood maturing in February, but the September brood 
probably is of very similar duration. 
Hampson describes a variety or “ ? younger stage ” of the 
larva with small white-haired dorsal papille on segments 
4. to 10, each with a pair of red-brown papille in front and 
a pair of crimson papille on each side. In all the larve that 
I have bred I have never seen this form occur. 
The female has a very strong attraction for the male. Ifa 
female be placed out at dusk,I have never failed to attract a male 
within a few minutes between the hours of 6.30 and 6.45 P.M., 
though the insect is by no means abundant here. Copulation 
commences at once, and egg laying is completed by morning. 
15 6(5)20 
