1903] DYAR:— NORTH AMERICAN GEOMKTRIDAE I97 



taintlv shadowed or obsolete, but Icaxing a series of elliptical segmentary spots on the ante- 

 rior edges of joints 5 to II ; broad subdorsal and narrow waved lateral white lines faintlj' 

 pigmented, only a trace of a stigmatal line; subventral black shade broken and dotted, but 

 distinct. Feet pale; tubercles whitish with black hair dots. 



Stage riL Head white, heavily black mottled and dotted over the vertex, a brown band 

 back from the antennae, edged by black dottings ; width i.i mm. Body moderate, not elon- 

 gate, smooth, green. A dorsal geminate, pulverulent, black line, partly broken centrally on 

 the segments, heavier at the ends and with scattered attributary dots in the dorsal space. 

 Subdorsal line pale, greenish white ; a faint waved lateral line, olivaceous edged above. 

 Subventral region broadly blackish shaded. Hair dots black; spiracles black ringed ; no 

 shields, setae small, dark. Later all shaded with brown in dense crinkled lines, leaving 

 narrow addorsal, broad subdorsal, narrow upper and lower lateral, subventral and broad 

 medio-ventral bands of pale. Dorsal black intersegmentary spots. 



Stage IV. Head rounded, flat before, oblique, the apex in joint 2. Ground color gray 

 whitish on face, yellowish over lobes, heavily checkered with black especially in a band each 

 side of the clypeus which converge to apex ; clypeus dark reticulate; width 1.6 mm. Body 

 moderate, flatly extended on a twig, colored like bark. Ground whitish and ocherous brown, 

 checkered with black ; dorsal line shaded, broken, pulverulent, forming patches at the ante- 

 rior and posterior ends of the segments, with addorsal spots at tubercle i, making a lattice 

 work. A quadrate black subdorsal patch breaking the yellowish subdorsal line behind 

 tubercle ii. Sides heavily black shaded except around the spiracles. Lateral and substig- 

 matal lines faintly traced ; subventral line (tubercle vii) rather broad and whitish. Tuber- 

 cles black; tubercle iv with white specks around it; spiracles pale. 



Larvae from Kaslo, British Columbia. Tliey fed on Ceanothus. Tiie 

 cocoon was spun at the ground of silk. 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.— L. 



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



Deiliiiia behrensaria Hulst. Most of the female specimens are D. hehrensaria, 

 the males are all D. cervinicolor. This is almost a constant sexual difference. 

 The varietal name seems scarcely warranted in any case. 



Egg- Elliptical, neatly rounded, snialler in dorso-ventral diameter but not flattened ; 

 truncate end fiat, neatly rounded, the other end depressed. Over 20 ribs running length- 

 wise, straight from the depressed end to the angle of the truncation, 9 visible on the broad 

 side, sharp, rather high, narrow, gently waved, joined by low but distinct linear cross-striae 

 forming rectangular cells about twice as wide as long. A distinct line runs around the edge 

 of the truncation and another half way to the micropyle, the ribs in crossing these form 

 somewhat cuneiform cells ; micropyle confusedly reticulate. Color pale vellow, later irregu- 

 larly spotted with red. Size .8 X .7 X .5 mm. 



Stage I. Head smooth, pale testaceous, eye black, mouth brown. Body moderate, vel- 



