1903] DYAR: — XORTH AMERICAX GEOMETRIDAE I9I 



7-8. Venter pale; no secondary hairs, the primary ones of tubercle vii scattered among the 

 rootlets. Feet all pale greenish. 



Spun a slight cocoon. One moth emerged the same season, but most hibernated 

 in the pupal stage, making the species normally single brooded. Larvae from 

 Kaslo, British Columbia ; they fed on the leaves of white birch. 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.— XLIV. 



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



Mesoleuca gratulata Walker. 



Egg. Elliptical, thick, the antemicropylar end strongly depressed, top and bottom con- 

 cavely flattened medially, micropylar end flattened. Rather coarsely wrinkly shagreened 

 all over except on the side of attachment, no reticulations. Uniformly pale yellow. Size 

 .8 X .7 X -5 mm. 



Stage I. Head cordate, black, the color diluted centrally, the pointed mouth brown. 

 Body normal, inoderately elongated; all pale yellow, tubercles small, blackish, a little raised ; 

 cervical shield dusky luteous, obscure ; setae distinct, rather long, dusky, glandular tipped. 



Stage II. Head bilobed, pale yellow, eye black, mouth brown. Body moderate, green, 

 roughened by the tubercles and annulets, translucent, unmarked; tubercles slightly raised, 

 concolorous ; feet green ; setae pale, distinct ; feet of joints 10 and 13 rather remote. 



Stage III. Head rather long, slightly bilobed, pale testaceous, eye black, mouth 

 brown; width .9 mm. Body translucent green, no shields, a narrow, broken, white subdor- 

 sal line, a faint white shade each side of the dorsal vessel, a narrow, waved lateral line and 

 subventral fold whitish. Tubercles large, elevated, smooth, concolorous, shining. Setae 

 rather long, pale, curved ; spiracles black edged. 



Stage IV. Head rounded, biloTaed, lobes full, clypeus moderate; green, shining; eye 

 black, jaws brown ; width 1.3 mm. Body not elongate, the central segments not much 

 longer than wide, cylindrical, subventral fold prominent, roughened by the tubercles. 

 Green, intersegmental folds yellowish ; a waved subdorsal line, narrow lateral one, and sub- 

 stigmatal line white, dull, obscure. Tubercles white, curved backward. Spiracles black ; 

 feet pale. 



Larva from Kaslo, British Columbia. 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.— XLV. 



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



Hydriomene 7nagnoliata Guenee. My specimen agrees more nearly with 

 Hulst's type of Hydriomene per)iotata Hulst than with some eastern specimens 



