February, ’24] 
GIBSON: CACCECIA ROSANA 
53 
The Larva. At first the young larva is yellowish-white, the head 
being blackish. As it develops it becomes green in colour, the head and 
thoracic shield being dark brown or black. When mature the larva 
varies from 15 to 19 mm. in length. It is of a dull green colour without 
any markings. The tubercles are inconspicuous, faintly brownish in 
centre. Tubercular plates on first thoracic segment conspicuous, 
large, brown, or blackish. Setae slender and pale brownish. Spiracles, 
pale, oval, brown-rimmed. Head 1.7 mm. wide, rounded, squarish, 
bilobed, reddish-brown, dark brown or black, shining; clypeus highly 
triangular, mouth parts reddish-brown; basal joint of antennae pale; 
ocelli black. Cervical shield dark brown or blackish, the extent of dark 
colour varying in the specimens. Anal shield concolorous with body. 
Thoracic feet black, paler towards extremity, shining; prolegs con¬ 
colorous with body. 
When the larva reaches maturity it pupates among the leaves where it 
has been feeding. The larvae received from Nova Scotia in 1919, had 
mostly all pupated by July 15, the length of the pupal stage being 9 
days in one instance, others 10, 12 and 16 days. In British Columbia, 
in June, Mr. Downes found the pupal period to vary from 10 to 16 
days, pupation commencing about the middle of that month. In 
1923, according to Mr. Auden’s records the pupal period varied from 10 
to 14 days, the average being 11. 
The Pupa. Length 8 to 12 mm; width at widest part about 2.8 
mm.; wing cases and thorax varies from light brown to black; abdomen 
light brown; cremaster darker brown with four rather stout curved 
bristles at terminus and two similar ones on either side. On each 
abdominal segment there is dor sally, two transverse rows of short stout 
spines. The skin between the rows of spines is finely pitted, that below 
each posterior row, coarsely pitted. 
The Moth. This has been described recently by Mr. Busck 5 as 
above mentioned under the name hewittana. 
Parasites 
Parasites were reared at Ottawa from Nova Scotia material, and at 
Victoria from British Columbia material. These have not been finally 
studied, but Mr. H. L. Viereck informs me that these are of four species, 
all probably undescribed. From Nova Scotia one species of Angitia 
was reared and from British Columbia material two species of Angitia 
and one species of Ephialtes. 
5 Canadian Entomologist, LIT, 125. 
