159 



two parallel, Mark, wavy lines on eaeli side, and the discal dot is distinct, 

 sometimes surrounded by a black ring; beyond the median band is a broad 

 white band, containing a dusky waved line, with an angle corresponding to 

 the angle in the outer edge of the black median baud; the white baud is often 

 limited by a regularly-scalloped black line; half-way between this line and the 

 edge of the wing is a white scalloped line, with a square black patch before 

 the costal termination (sometimes the three submarginal lines are obsolete, 

 and the outer third of the wing is quite clear whitish, with scattered dots, or 

 with a flesh-tint). The hind wings are whitish, with live or six parallel, 

 scalloped, dusky lines beyond the discal dot. 



Length of body, £ , 0.44. 9 : of fore wing, <S , 0.55, 9 ; expanse of wings, 

 1.15-1.25 inches. 



Caribou Island, Southern Labrador, July 7-24 (Packard, Williams Col- 

 lege, Exp , 1860); London, Canada (Saunders); Treat's Island, Eastport, Me.. 

 July 16 (Shurtleff); Brunswick, Me., June, July (Packard); Portland, Me. 

 (Morse): Salem, Mass., August 21 (Packard ; Nahant, Mass; (Moering) ; 

 Brookline, Mass., May 30 (Shurtleff); Cambridge, Mass. (Harris Coll.); 

 Springfield, Mass., May (l)immock); Dedham, Mass. (Very); New York, 

 August 2 (Mead); West Farms, N. Y. (Angus); Brooklyn, N. Y. (Graef ) ; 

 Ithaca, N. Y. (Smith); Brewster's, N. Y. (Grote) ; New Jersey (Sachs): 

 Philadelphia, Pa. (Amer Ent. Soc.) ; Lansing, Mich. (A. J. Cook) ; "Canada, 

 New York " (Guene'e). 



This very abundar.t species may be known by the whitish ground-color 

 of the wings, and the heavy, black, median band with a simple tooth in the 

 median venule, and by the absence of a sinus below the costa, while the 

 hind wings have about six usually well-marked, dark, scalloped lines. 



The two Labrador examples are rather smaller than those found farther 



south. 



Rheumaptera unangulata Packard. Plate 8, fig. 75. 



" Geometra unangulata Haw., Lep. Brit., 332, 1803-29." 



Sarpali/ee unangulata SU'i>h., Nomencl. Br. Ius., 44. 1829; 111., iii, 22o, 1831. 



Larentia unangulata H.-Sch., Schru. Eur., iii, 150, 1847. 



Mi lanthia amniculata Steph., Cat. Br. Ins.. 014. 1850. 



Melanippe unangulata Cum., Plial., ii, 394, 1857. 



Walk.,* List Lep. Het. Br. Mns., xxv, 1286, 1862. 



2 J and 4 9. — This species may best be described by comparing it with 

 R. lacustrata, with which it is liable to be confounded. The wings are clearer 



* The following synonyms an- also given by M. Guene'e ami Standinger: Ucolorala Borkh, .', 396; 

 Lis. Rosl., 98?: amniculata Hiibn., 386 ? ?; Boisd., 216. 



