[77] NOTES ON NOTODONTA DICTJEA. 189 



ground, when, much to my surprise, notwithstanding its weak 

 condition, it speedily buried itself beneath the surface for 

 pupation. 



The moth was not obtained from it. 



On Sept. 14, 1869, a second larva was found at Bethlehem, 

 Albany county, feeding on the aspen (Populus tremuloides), 

 in an earlier stage of its growth, and just after a molting, 

 judging from the comparative size of its head, which was 

 twice the breadth of its body. Its length was .56 inch, and 

 diameter .05 inch. 



It was fed on aspen leaves, and on the 19th it again molted. 

 The following day it resumed its feeding, and the day there- 

 after its dimensions were, length , diameter .08 inch, diam- 

 eter of head .12 inch. It was of a yellow-brown color dors- 

 ally, with transverse slate colored markings centrally on the 

 segments. (No further record of the larva : it probably died 

 before its maturity). 



On Sept. 5, 1872, another larva, 1.65 inch long, was taken 

 on poplar. Body greenish- white dorsally, shading on the side 

 into green ; substigmatal stripe bright yellow, interrupted 

 below the stigmata by the extension of the oval white spot 

 encircling the stigma. Caudal horn black. Caudal shield 

 broadly crescentic, granulated, with a glassy tubercle cen- 

 trally and margined with brownish-red. Legs and prolegs 

 having the portions of the body above them of a violet color 

 - the proiegs with an acutely elliptical ferruginous spot upon 

 them outwardly, crossed on their anterior part by a quadri- 

 lateral black spot. 



Sept. 14, 187-, larva feeding on Populus tremuloides, at 

 Bethlehem. Length at rest, 1.3 inch ; diameter .18 inch ; the 

 head and first pair of legs extended in line with the body. 

 Head of the diameter of the thoracic segments, subquadran- 

 gular, deeply impressed medially, smooth, of a bluish-gray 

 color, showing reticulations under a magnifier ; man- 

 dibles and a crescentiform spot bearing the eyes dull 

 yellow. Body with a marked degree of transparency in its 

 lower portion, shining, without the usual annulations of the 

 segments, nearly cylindrical to the tenth segment, the elev- 

 enth broad, elevated in a prominent cone ; the thoracic seg- 

 ments contracted when at rest, forming each three distinct 

 wrinkles, making these segments broader than the succeeding 

 ones ; incisures deep ; color bluish-gray, a yellow ventral line, 



