180 THE CANADIAN ENTOMOLOGIST. 



stigmatal rows pale red. Underneath yellowish-green, and in some places 

 reddish, speckled with white ; 1 2th segment reddish, both above and 

 below ; head black, and covered with many hard, white, conical tubercles, 

 ■or short spines ; somewhat cordate, with two thick, black, branching 

 spines at the upper corners like horns. The chrysalids were about one 

 inch long, pale green or light brown, sometimes with a reddish tinge, with 

 two sub-dorsal rows of tubercles, eight in each rov.^ the first six of these 

 being bright, shining silver (in some lights gold) in colour. Like the 

 other Grapta chrysalids, they were suspended by a button of silk at the 

 tail. Before the imagos appeared, the colour and venation of the wings 

 could be seen through the transparent outer covering. I found them on 

 the 26th of May, 1889, when they were about eight inches long. On the 

 9th of June, they were two inches long. They moulted three times, and 

 their appearance remained almost unaltered. They hung themselves up 

 on the 13th of June, being then about 2.25 inches long, and on the 14th 

 transformed. The imagos appeared on the 29th and 30th of June. I had 

 altogether eight of these larvae. The following is a description of a variety 

 of the same larvfv taken at a later date : — On the i6th of June, I found 

 the larva feeding, like the former batch, on the silver birch. Length 

 about one inch. On the xyth it moulted, after which it was 1.5 inches long ; 

 colour purplish white and amber, with a dorsal band of white clouds, and 

 some on the sides ; white imderneath ; one dorsal, two sub-dorsal, two 

 super and two sub-stigmatal rows of branching spines on segments 4 to 11, 

 2 to II, 2 to 12 and 2 to 11 respectively. These spines were supported 

 by tubercles, and the dorsal, sub-dorsal and super stigmatal were black, 

 except the last two super-stigmatal ; the "rest were yellow and white. 

 Head somewhat cordate and pale white, with two black branching spines 

 at the upper corners like horns, and covered with small conical tubercles ; 

 upper corners black, and a dark mark like an inverted V over the jaws. 

 On the 23rd it moulted again, after which it was light gieen, with two 

 dorsal bands, more or less distinctly separated, of white clouds, and some 

 white lateral markings ; spines black, except the super-stigmatal, which 

 were brown and amber, and the sub-stigmatal, which were pale green and 

 white ; the spine tubercles were orange yellow ; head white, and covered 

 with small, white, conical spines ; spiracles black. It was largest at the 

 7th segment, segment i being very small ; length about 1.75 inch. The 

 chrysalis (June 29th) was green, with a rosy tinge and rosy markings, and 

 with two dorsal rows of tubercles, 16 in number, the first six being shining 

 silver in colour ; about one inch long, with a large dorsal lump and two 

 smaller lateral ones, and two at the head ; black markings on last segment. 

 On the 9lh of July the imago appeared. Note that in this, and in the 

 former description, the head is not counted as the first segment. 



Percy M. Dawson, Montreal. 



Mailed September 6th. 



