Article beginning on page 429.
Psyche 8:429, 1897.

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PS YCHE
November 18gq.I 429
LIFE HISTORIES OF NORTH AMERICAN GEOMETR1DAE.- VT. BY HARRISON 0. DYAR, WASHINGTON, D. C.
Percno-fitilotajliivlafa lliibn. This larva has been described by European authors
(quoted in Packard, Mon. Geom., pp. 78,
564, and by itofn~ann, Raup. gross Sch.
Eur., p. 241), but I find no original descrip- tions in American literature.
Bgg. Rounded elliptical, flattened above and below; one end depressed, the other a little flattened, not truncate. Surface with flattened sireas, forming a many-sided poly- hedron. the cell areas scarcely concave, rounded hexagonal. S1i;ning pule greenish yellow. Size .6 X .4 X .3 niin.
Sfqe I. Head rounded, sordid Imeo~~s,
dark; width about .3 inm. Body rather thick, smooth, of a sordid brownish, without marks, rather dark n.nd somewhat transparent. Feet pale, setae obscure- After feeding the larvae appear green, hut dark and sordid, becoming more triinsliicetit withs growth, the thorax and joints 10 to 13only brownish. The larvae rest in a curious atlitnde, upright with the distal hdr~11i"led in a spirsil.
St~c~ve II- Head ronndeil, slia;'lit!y bilobed, with high clypens; pale bruwn; setae short ;uid stiff; width .4 mm. Body long and
slender, cylindrical, smooth, feet of joint 4 projecting, cervic:it shield a little nnplarly elevated. All pule brown, not shining, trans- lucent. with five n:irrow clnrk lirown lines on the dorsiun (dorsnl, i1~1i.loi't.al and subdorsal). Sutw small, glandular tipped, pnle ; tubercles ctilorle--s, moderate. Tie food shows green nd renders the ctorwl lines obscure.
Stays II!'.
1Ie:id rounded, sordili lutcous,
two vertical slisi~les competed of brown dots extending up the face of each lube; ocelli hl.ick ; width about .jn-im. Botbtranslucent, slightly yellowish, green from the fiiod ; clor- s;il. addorsal and snbclor<al lines, narrow, wavy am1 brokrn, iind traces of ii stigmntal line, ilistinct centrally on the segments ; spirn- cles brown shaded and subventral spots about the tubercles, giving a superficial resein- blance to broken transverse bands. Base of thoracic feet and n band on the front of the foot of joint to dark brown; feet pale; skin snboth, not shiny. Setae and .tubercles very small and obscure.
Stage IV. Head pale brown, thickly dot-
ted with dark brown ; a diffuse white stripe on the face of each lobe widening above; apex of clypeus brown; width 1.2 mm. Hody
light green on the ventral half, almost kith- out marks, only traces of longitudinal lines ; dorsum darker green, with geminate dorsal, addorsal and subdorsal whitish pulverulent lines, separated, and the subdorsal edged be- low by brown shadings, which are distinct intersegn~en~~lly and faint in the centers of the segments, nearly absent and broken
into spots at the extremities. Abdominal feet strongly lined with dark brown, es- pecially the foot ofjoint 10 in front; thoracic feet pale ; fipirticles black ringed ; setae short. black, will1 enlarged pale tips; tubercles whitish, binall: iii before the upper corner of the spiracle, iv opposite the lower corner, v before, vi below the spiracle subventrally. The larvae still rest in a half spiral.
In the brown form the whole dorsum is
heavily marked with dark brown, leaving
diamond shaped intersegmentiil marks of
pale brown with brown central clots, the lateral margin of the brown wavy. Region below spiracles pale brown, scarcely mottled. Some examples are intermediate between
these two forms
Larvne from Bellport, Long Island, N. Y. Eggs July 12th~ mature larvae Augns>t 2nd and iinagoes again on August iath.
The lan-ae fed on Polygonurn and another common gal-den weed not determined.




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