,S6 PSYCHE. [July-Angust iSSS. 



The larva moulted on 35 July, and The head had grown more round, 



was 25 mm. long and of the same colors with a slight indentation on top — not 



and marks as before. enough to call the head bifid. 



On 27 July faint lines of a reddish On 4 August the larva was 62.5 mm. 



color began to appear above the oblique long, and the marks were brighter, 



yellow lines. The caudal horn was short in propor- 



On 30 July the larva was 44 mm. tion to the size of the caterpillar, 



long, and ate voraciously. The tips of On 10 August the length of the larva 



the feet had become red. The yellow was 87.5. mm., and the marks were 



stripes on the head had grown very unchanged, 



bright. On 12 August it began to be restless. 



On 31 July it moulted again, being 53 and on 13 August it went into the 



mm. long. ground during the night, but re-ap- 



The mouth parts were black: the peared again on the 14th, though it ate 



yellow face-lines were edged with nothing. 



black ; and the caudal horn had a black On 15 August it had gone into the 



line on each side instead of a yellow ground again, and 31 August it had 



line. Other marks as before. become a bright mahogany-colored 



On 2 August the colors had changed pupa, 37.5 mm. long, with a tongue- 

 somewhat, case 3 mm. in length and lying close 



The face-lines had become pale green against the pupa, 



edged with black — rather faint — ; the On 7 June, iSSS, the pupa had 



seven obliques were white edged above grown much darker and didler, and on 



with pinkish lilac; the yellow horizon- 10 June, at about S.30 a.m., a fine 9 



tal line had gone from the first three emerged. 



segments, and those segments, as well The larva was fed entirel}' on poplar, 



as the lower half of all the others, were I had netted a $ imago in a field 



marked with tiny white dots, each en- near the poplar where I found this 



circled with black. larva, only a few days before, flying at 



The props had a faint purplish tinge. almost noon, and feeding at kale blos- 



The soivacles were red. soms. 



THE ARRANGEMENT OF THE NEW ENGLAND SPECIES 



OF THANAOS. 



BY SAMUEL HUBBARD SCUDDER, CAMBRIDGE, MASS. 



An examination of the androconia brought to light some very curious facts, 

 concealed in the costal fold of the fore showing how closely related , as far as 

 wing in the species of this genus has these scales are concerned, some of the 



