D YAR~^XORTH AMERICAX GEOMETR/DAE 
43 
1905] 
LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE— LIX. 
BY HARRISON DYAR, WASHINGTON, I). C- 
Euchlaena a’ib'lttsaria \Valker. 
E^g. Elliptical, well flattened, one end depressed, truncation rounded, not very obvi- 
ous. Surface dimly he.xagonally reticulate, the cell areas rather deep and pronounced but not 
sharp and all overlaid and obscured by fine granules of shagreen. Towards the large end the 
pores at the angles of the reticulations are marked by large, distinct, rounded white elevations, 
but these become small towards the center of the egg and are lacking on the small end and the 
flat sides. Truncation reticular without white elevations, bluish green, frosted by the while 
dots, turning bright red. Size 1 x .6 x .5 mm. 
Stage /. Head brownish luteous, the sutures dark. Body moderate, subdorsal and ventral 
broad red brown stripes, the subdorsal pair fused on joints 10-13 marked in pale on the cer- 
vical shield. Sides white; abdominal feet stained with red, thoracic ones luteous. 
Stage II Head rounded bilobed, whitish, clypeus and epistoma white, all the sutures dark 
brown; two parallel rows of gray dottings over the lobes; width .55 mm. Body slender, greenish 
white; broad subdorsal bands joining posteriorly, dotted on joint 2, and broad ventral band 
purple brown, 'bhoracic feet brownish black, the abdominal ones reddish. 'Fubercules pale, 
setae black, both minute. 
Stage III. Head oblique, flat before, lobes full; whitish with vertical rows of brown dots; 
and band across the bases of the antennce; width i mm. Body moderate, slightly flattened, 
tubercles raised; dorsum brown, darker posteriorly on the segments, a geminate dotted dorsal 
line pale filled; sub-ventral fold white, subventer brown, venter dark purplish brown with fine 
geminate medioventral pale line. Small segmentary black subventral spots under the white 
fold. Feet pale; tubercles small, black; setae minute. 
Stage lY- Head widest below, slightly bilobed, clypeus depressed; gray, spotted with black 
heaviest on the lower angles of the lobes and across above the mouth; a pale streak on the side, 
width 1.5 mm. Body moderate, slaty gray, slightly streaked. Tubercles ii of joints 5, 8, 9 and 
12 elevated, papillose, black, with black subdorsal blotches beside them, present but less 
distinct on the other segments. A broken, diffuse white band along the sub-ventral fold. 
Abdominal feet whitish outwardly, lined with black in front. Subdorsal, lateral and suprastig- 
matal pale lines indicated. 
Stage V , Head round, somewhat quadrately bilobed; whitish gray mottled with darker, a 
black patch each side of the clypeus below and across above the mouth and on bases of antennae, 
width 2.3 mm. Body moderate, tubercle ii raised and marked in black, especially on joints 5 and 
II. Ashen gray with traces of waved white lines; dorsum of joints 5, 6, 7 and 8 washed in 
whitish, sides with irregular black marks, whitish intersegmental washings on the subventral fold; 
foot of joint 10 whitish, the others gray. Feet of joint 4 erected, the others appressed. The 
resemblance is to bark, all the markings being illy defined. 
Eggs June 14, mature larva August 6, single brooded with hibernation in the pupa. Larvae 
from Kaslo, British Columbia. 
