MEMOIES OF THE KATIO]:j^AL ACADEMY OF SCIENCES. 
151 
JIahits. — The moth was collected at Kittery, Me., July 18, by ^h\ E. Thaxter, and at Man- 
‘Chester, Yt., xVugust 3, by Mr. C. H. Eoberts (as by labels in F. S. Nat. Mus., Washington). 
Pu]>a in August; moth, iNtay, June, and August (Eiley MS.). 
‘^The species is doubled-brooded at Plattsburg, N. Y., single-brooded in the Adirondacks, 
though a single S emerged the same season” (I)yar), 
Food plants, — Betula (Thaxter, Can. I’hit., xxiii, p. 31, Feb., 1891) ; BetnJa ijapifrifcra (Dyar). 
Geographical disfrihution. — Thus tar only known to inhabit the Appalachian subprovince. 
The following localities are the only ones yet known to me: Orono, 3[e. (^Irs. Fernald); Kittery, 
Me. (Thaxter); Yermont, New Y'ork (U. S. Nat. Mus.); New Hampshire (C. A. AYalker); Catskill, 
N. Y. (Mus. Comp. Zook); Plattsburg, N. Yk, Keens Yalley, Essex Co., N. Y'., (Dyar); Boston, 
Mass. (Sanborn); ^Manchester, Yt. (Eoberts, U. S. Nat. ilus.); Maine, Canada, New York, North 
Carolina (French); Plattsburg, N. Y. (Hudson); Fort Collins, Colo., June 21, at light (C. 11. Baker). 
Effg , — Flattened hemispherical ; shell under a hand lens appears almost smooth, but under 
•a Yinch A eyejhece seen to be ornamented with six-sided areas, with raised, beaded edges. 
Diameter, 0.7 mm. 
Larva, Stage L — Just hatched. Length, 3 mtn. Head large, mucli wider than the body, black- 
brown, smooth, polished, Avith a few scattered long slender hairs. Body uniformly pale yellowish 
green, tapering to the end, the segments transversely wrinkled, hairs long and dark, slender and 
tapering. A faint darker dusty greenish prothoracic subcrescentifonn plate. Body Avith no 
markings; no lines or spots. 
Providence, June 19. Eggs kindly gh^en me by Mr. W. Dearden. All the eggs hatched at 
nearly the same time and on the same day. 
The larva eats a hole out of one side, of the usual irregular kidney shape. 
Pupa, August; adults, May, July, and August; localities. New Y'ork, Yermont, and District 
of Columbia. 
Pupa . — About 19 mm. long, robust, tip truncate, very slightly tapering; a very slight and 
blunt projection at tip scarcely noticeable; general surtace shiny, somewhat rugose, and remotely 
punctate. No processes or teeth at sutures between meso and inetathorax. 
“ Egg ^, — Laid singly, iisually on the upi>er side, near the middle of the leaf of its food plant 
[Betula papgrifera). Eounded, someAvhat tlattened, about the shape of two-thirds of a sphere 
with flat base; diameter,! mm,; height, 0.0 mm. Slightly shining, tine turquoise-blue or more 
rarely of a greenish blue tint. IMicroscopic reticulations neatl.y dehned, but rounded, scarcelj^ 
angular, becoming small and indistinct at the micropylar region. On the sides the reticulating 
edges of the cells become broad, flat, almost like bands, reducing the inclosed depressions to 
shallow j)its. Found during the early part of July at Keene Yalley, Essex County, N. Y". 
^^First larvxil stage, — (.)n hatching the larva leaves the shell largely intact and talces up a 
jmsition at the extreme apex of the leaf, where it eats the upper ej)idermis and parenchyma. 
Head cordate, entirely shining black; width, (LO mm. Body rather bright greenish yellow, thoracic 
feet black, cerAucal shield trausA*erse, dusky. Setm flue, short, black, distinct, but without cAudent 
tubercles; not glandular; 1 and 2 nearly in line, 3 aboA'C .s])iracle, 4 substigmatal posteriorly, 5 
subventral anteriorly, 0 absent as usual in the (irst stage. Feet all used; leg plates concolorous 
with the body. No anal plate. Length, about 3 mm. 
Second stage . — The larva eats uAvay the substance froin the midrib of the leaf at the apex, 
using the midrib as a perch on which it rests. Head slightly bilobed, greenish; a smoky black 
shade coA^ers the side, including the ocelli, and a narrow smoky band reaches the apex in front of 
the lateral angle; mouth brown; a few setm; widtlq about 1 mm. Body cylindrical, smooth, feet 
normal, all used. Thoracic feet and leg plates black, except the anal pair. Setm short and tine, 
dark, from minute black tubercles, \’ery inconspicuous; arrangement normal, six i)resent. Body 
green, Avith very faintly indicated addorsal, subdorsal, lateral and superstigmatal Avaved AAdiitish 
lines. Spiracles pale. 
Third stage , — Head rounded, flat before and held out flat; leaf-green; a smoky black band 
behind ocelli extends backward and upward to the side of the head, Avhere it ends tapering; mouth 
reddish; width, 1.0 mm. Body as before, but the fine dark sehe have no tubercles. Color pale 
leaf-greew; on joints 2-3 a yellowish line edged above Avith red extends up from below the spiracles 
The following notes on the transformations are copied from Dyar. 
