1904] DYAR: — NORTH AMERICAN GEOMETRIDAE 29 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE. — LIII. 



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



Eustrovia nuhilata Packard. 



Egg. Elliptical, flattening, depression and truncation all slight and rounded ; uniformly 

 and neatly hexagonallv reticulate, the lines narrow, moderate, distinctly raised, a little waved 

 and not rigid, suggesting the stellate sculpture. Pale yellow, turning red ; size .8 X -6 X 

 .5 mm. 



Stage I. Head rounded, erect, pale whitish with numerous black dots, mouth brown. 

 Body moderate, slender, finely annulate, feet normal, no shields. Pale whitish ; a broad gra}' 

 smoky subdorsal band, faint, clouded ; similar but narrower subventral and medio-ventral 

 ones, waved, clouded. Tubercles small, conical, brown; setae club-shaped, short, pale. 



Stage II. Head squarish bilobed, sordid white, thickly checkered with black, leaving a 

 pale streak on lobe above ; width, .6 mm. Body cylindrical, moderate, sordid greenish white 

 with waved brown lines. Dorsal line straight, expanded on the anterior edges of the seg- 

 ments ; subdorsal straight above, subconfluent with the waved lateral line below, forming 

 loops about tubercle iii ; traces of upper subventral and broad lower subventral bands. Tub- 

 ercles small, black, raised ; setae short, brownish ; thoracic feet brown-black, abdominal ones 

 blackish bordered outwardly. 



Stage III. Head bilobed, free, pure white with contrasted black angular dots filling the 

 median suture broadly and covering the sides of the lobes, leaving a short streak above, the 

 area about eyes and clypeus white ; width .85 mm. Body moderate, normal, gray from 

 blackish streaks and lines heavily overlaid on a whitish ground. Tubercles white, round, ii 

 and iv large and prominent, the others comparatively inconspicuous. Segments finely annu- 

 late posteriorly. Feet pale, dotted with black. No distinct lines ; dorsal line narrow, dark ; 

 traces of waved subdorsal and lateral white; subventer and venter with broader pale lines. 

 Setae from black hair dots, pale brown, thick, flattened at tip. Later the black marks become 

 reddish brown, a pale white streak is about tubercle ii and a black shade at tubercle iv. 



Stage IV. Head w^hite with black dots as before but thicker, covering most of the surface 

 except a narrow streak across lobes to clypeus ; width 1.4 mm. Body moderate, flatly out- 

 stretched, sordid gray ; tubercle ii white, contrasted, an oblique pale shade from it down and 

 anterior, to the pale subventral area. Other tubercles white, less conspicuous, iv with a black 

 circle. The ground color is dotted with blackish and white, indicating waved subdorsal and 

 lateral lines. Feet gray and blackish, the anal pair large, triangular, with a white line 

 before. Setae short, thick, somewhat club-shaped, pale. 



Larvae from Kaslo, British Columbia ; they fed on Epilobium. 



