1903] DYAR-.—XORTH AMERICAN GEOMETRIDAE \(^z^ 



Eggs were obtained as early as July 5th when the moths had only just begun 

 to fly, but all the larvae hibernated. Many were very small, only a few reached 

 the fifth stage in the autumn. They were fed on Polygonum, but are probably 

 rather general feeders on low vegetation at the ground. The coloration is adapted 

 both for concealment in such a situation and for hibernation at any stage after the 

 first. Larvae from Kaslo, British Columbia. 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.— XLVIII. 



BY HARRISON G. DYAR, WASHINGTON, D. C. 



Deilinia crytJirc7naria Guenee. My adults agree with Vancouver Island speci- 

 mens, called Deilinia pacificaria Packard. I do not think that the form is specific- 

 ally distinct from the Atlantic coast D. erythremaria Guen. The slightly larger 

 size and very slightly more distinct markings do not seem to justify more than a 

 racial distinction. In Bulletin 52, U. S. nat. mus., Dr. Hulst credited the European 

 D. examthe^nata Scop, to " Canada." If this is correct, I would refer both D. 

 pacificaria and D. erythremaria as varieties of the European species, though I think 

 it is more probable that the European form does not occur in America at all. The 

 European larva is described as entirely green or with pale dorsal lines. 



Egg. Elliptical, strongly compressed but without flattened areas, depression marked, 

 truncation broad and sharp edged; reticulations linear wavy longitudinal lines, 9 or 10 visi- 

 ble on the flat side, raised, finely waved, in one place two confluent, projecting at the rim of 

 the truncation, confused at the other end. Cross-striae fine, distinct, forming elongate 

 rectangular cells; truncation nearly smooth, obscurely reticulate, concave, raised at the 

 micropyle. Color dull bluish green. Size .8 X -6 X 4 mm. 



Stage I. Head rounded, depressed at clypeus, pale orange, shining. Body slender, 

 normal, rapidl\' looping. Pale >ellowish with dorsal and subventral red brown lines the 

 whole length, narrowed just at the ends. No shields; feet pale. Tubercles moderately large, 

 not elevated, setae minutely capitate. 



Stage II. Head flattened, rounded, held flatl\-; whitish with a blackish band behind 

 ocelli and a faint vertical one, both continuing lines of the body. Width about .5 mm. 

 Body slender, elongate, whitish, appearing green throughout from the food. A distinct 

 black brown dorsal stripe from joint 2 anteriorly to 13, fading on the anal flap ; a similar 

 stigmatal line. Feet pale. Setae very short with the tubercles not visible. 



Stage III. Head rounded bilobed, flatfish but the lobes full, oblique ; pale luteous 

 green, not shining; a dark mark in the vertical- suture and a heavy brown side band behind 

 the ocelli of brown black; width .8 mm. Body rather slender, translucent green from the 

 food, not shining, not annulate. Dorsal and sub\entral stripes blackish brown, moderately 

 broad, even, shai-p, covering the outside of the feet of joints 10 and 13. Thoracic feet pale ; 

 tubercles and setae invisible; no shield. 



