no. 1753. NORTH AMERICAN GEOMETRID MOTHS- GROSSBECK. 373 



more denticulate than above and frequently bordered externally with 

 pure white. Thediscal spot on the fore wings is whitish and linear, 

 but on the hind wings is large, oval, and dark brown. 



Habitat. — Arizona, New Mexico, Colorado, Utah, and southeastern 

 California. Specific localities: Arizona: Huachuca Mountains ; Santa 

 Catalina Mountains: Palmerlee, Cochise County: Redington; Pres- 

 cott, Yavapai County; Baboquivaria Mountains, Pima County. New 

 Mexico: Fort Wingate; Las Vegas; Hot Springs, 7, <>(>(> feet. Colo- 

 rado: Durango; Golden: Glenwood Springs. Utah: Stockton: 

 Beaver Valley. California: Argus Mountains. Flies from May 24, 

 through June, July, and August, to September 21. 



A rather small variable species common in the Southwest. In the 

 course of the transverse lines it is much like oceidi ntalis, but the outer 

 line is more strongly sinuate. The ground color varies from white to 

 yellowish or yellowish-brown and the cross lines are pronounced. 



The genitalia are comparatively short and broad, as is also the 

 clasper. 



Type.— Cat. No. 13125, U.S.N.M. 



PERO MORRISONATUS Hy. Edwards. 



Plate 13, fig. G; Plate 16, fig. 7. 



1881. Azelina morrisonata Hy. Edwards, Papilio, vol. 1, p. 121. 



1886. Azelina morrisonata Hulst, Ent. Amer., vol. 2, p. AS)=1nibnerata. 



1902. Azelina ancetaria, \a,r . morrisonata Hulst, Hull. 52, I . S. Nat. Mas., p. :',!(. 



Expanse, 35 to 37 mm. Head and thorax pale brown or yellowish, 

 the thoracic crest paler, and the whole with scattered whitish scales. 

 Abdomen concolorous with thorax or yet paler and usually profusely 

 mottled with dark brown scales which sometimes congregate and 

 form continuous bands on the posterior pari of the segments. 

 Antennae yellowish, rarely whitish at the base. Front sometimes 

 darker brown than vertex, the superior edge rarely with an indication 

 of a white line connecting the whitish spots at base of antenna'. 

 Ground color of wings variegated pale yellowish wit h a faint olivaceous 

 cast to bright yellow. Inner line of primaries dark brown or blackish, 

 well scalloped and usually well defined across the wing. Outer line 

 moderately or rather strongly sinuate, concolorous with inner line, 

 defined externally, shaded internally one-fourth across the median 

 space. Inner and median areas mottled, often profusely, with dark 

 brown, the mottlings assuming, on the whole, a transverse position. 

 Outer area finely and rather sparsely strigate, with two oblique wa\ \ 

 bands, more or less pronounced, between which is a paler brown 

 cloud. A rounded darker brown cloud is usually present between 

 veins Mj and Cu 2 , close to the outer line. One to three intervenular 

 white dots near the outer margin, the subapical one largest, and a 

 black spot between the branches of cubitus. Discal spot white, 



