i 9 o 6] DYAR—LIFE HISTORIES Of NORTH AMERICAN GEOMETRIDAE 9.5 
LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.— LXVI. 
PA' H.\RRISOX G. DVAR, \V.\SHINGTON, D. C. 
Cosymbia Inmotaria IIuIhi. 
The larva has l)een observed by Dr. S. H. Scudder, who ]wl)Iished de- 
scriptions of the last stage and pupa (Psyche, viii, 103, 1897). His de- 
scription was previously quoted by Packard (Mon. Gcom., 363, 1S76), who 
gives also a figure of the larva after .Vbbott ( Mon. Geom., pi. 13, fig. 22, 1876) 
and of the pupa (loc. cit,, ]) 1 . 13, fig. 14). The food plant observed by Scudder 
was sweet fern (Comptonia) ; Abbot gives Psoralca, while my larvae fed on 
blueberry (Vaccinium) . I have described the egg and first stage in British 
Columbia larvae ( Proc. U. S. Nat. IMus., XX\TI., 901, 1904). 
Egg Long elliptical, ends rounded, depression slight, the sides compressed, 
not strongly flattened. Reticulations coarse, even, well raised and rounded, 
irregularly hexagonal. Size .6 x .3 x .25 mm. 
Stage I. Head round, whitish. Body moderate, slender, dorsum and 
venter broadly dark grey, sides narrowly whitish. I'eet pale. 
Stage II. Head quadrately rounded, thick, equal, dull luteous with a faint 
smoky band, later all smoky shaded leaving an erect pale line on each lobe ; 
width .3 mm. Body moderate, normal, dorsum and venter broadly smoky 
olivaceous black, sides narrowly pale greenish. Thoracic feet pale, abdominal 
ones blackish, shields and tubercles invisible, concolorous. 
Stage III. Head full, erect, thick, bilobed, finely gray-brown dotted, 
leaving a pale vertical streak on each lobe ; clypeus and a spot each side 
white ; width .4 mm. Body moderate, seeming flattened, broadly velvety brown 
dorsally and ventrally, sides narrowly bright greenish white, from joint 2 to 
the anal feet; foot of joint 10 brown. Tubercles, setae and shields concolorous, 
invisible. Traces of indefinite white subdorsal lines in the hrown dorsal area. 
Stage II’. Head full, thick and rounded, slightly bilobed, red brown 
with white dotting; a vertical stripe of wdiite on each lohe with a dot below 
besiile the clypeus, lahrum white; width .75 mm. Body moderate, uniform, 
annulate somcwdiat irregularly, red brown, sides white, a fine, broken, narrow 
subdors'il white line, retracted intersegmcntally and more distinct than a still 
finer straight dorsal line. Outline of wdiite lateral area irregular, a little 
shaded, b'eet brown, the anal pair white outwardly. Tubercles small, dark, 
showing in the white area ; setae fine, small. 
