68 ROYAL SOCIETY OF CANADA 
near the end two shorter spines which are also curved, as well as being 
curled at the tips. 
The first moths emerged on June 29, and others appeared soon 
afterwards. 
Food plant.—The larve were fed on horse radish, Nasturtiwm 
armoracia, Fries. 
The female moth which laid the eggs was identified by the Rev. G. 
W. Taylor. ‘ 
GONODONTIS DUARIA, Guenee. 
Eggs of this geometer were laid by a female, taken at Ottawa, 29th 
May, 1901. 
Egg.—0.6 mm. x 0.8 mm., oval, smooth, shining; creamy-yellow 
when laid, changing to bright coral red in three days. One day before 
hatching the eggs turned to a dark purplish-red colour. The eggs 
hatched on the 7th and 8th June. 
Stage I.—Length at first 3 mm. Head 0.4 mm. wide, round, dull 
black, under a lens minutely pitted, centre of clypeus white, on either 
side of which is a white spot; antennæ whitish, hairs on face short. 
Body cylindrical, chocolate brown, bearing five transverse rings of white. 
These rings occur on anterior margin of segments 5, 6, 7, 8 and 9. On 
examination with a lens these rings are seen to be composed of 5 small 
white spots on the side and 6 on the dorsum, 3 on each half of the 
dorsal area, the whole 6 forming a U-shaped mark. There are also some 
very small white spots on the posterior three segments. In place of the 
thoracic shield there are two large black, rather elongated spots, on the 
dorsum of segment 2, hut these are hardly visible. Thoracic feet black, 
tipped with white, prolegs concolorous with body, claspers pale. 
Stage II.—ULength 6 mm. Head 0.6 to 0.7% mm. wide, dull black 
as before, clypeus white, on either side of which are two conspicuous 
white spots, the lower ones being the largest. There are also two small 
white spots just above the ocelli, and another in centre at top of each 
cheek ; antennæ pale; hairs on face very short and pale. Body reddish 
chocolate brown, some specimens with a greenish tinge. The rings of white 
are now only clearly visible on segments 6, 7, 8 and 9, just the faintest 
trace on segment 5, and the U-shaped mark is only present on segments, 
6, ? and 8. . In this stage there are longitudinal lines, or stripes, on the 
body as follows :—a very faint, almost imperceptible medio-dorsal stripe. 
a white lateral line, a supra-stigmatal white line, an infrastigmatal wavy 
white line, a subventral white line, and a double medio-ventral 
white line. In centre of each of segments 4, 5, 6, 7 and 8 between the 
supra-stigmatal and infra-stigmatal lines, there is a large protuberance. 
There is also a swelling on some of the other segments in the same place, 
