no.1753. NORTH AMERICAN GEOMETRID UOTHS GROSSBECK. 369 



a small white dot is present between veins R 5 and M, and another 

 still smaller one is between veins M 3 and Cu x . Very rarely thissecond 

 dot is absent. Also a black dot of similar proportions is between the 

 two branches of cubitus. Discal spot, white, linear. Fringe concol- 

 orons with ground color or distinctly brownish. Transverse line of 

 secondaries irregular, faintly brownish, and bordered outwardly with 

 white — the really conspicuous part of the line. Outer area darkly 

 shaded at anal angle. A black spot between veins Cu, and Cu 2 and 

 sometimes two or three other smaller ones between adjacent veins. 

 Discal spot absent or showing as a faint dusky patch. Fringe as in 

 primaries. Beneath, paler than above, sometimes almost whitish, 

 and more or less dusted with blackish atoms, especially on second- 

 aries; both wings shaded costally and outwardly with faint purplish 

 or brownish. Outer line of primaries showing on anterior portion of 

 wini^s. Discal spot as above. Transverse line of secondaries present 

 across wins;; dark shading in anal angle as on upper side: discal spot 

 large, black oval. 



Female. — Expanse, 30 to 42 mm. The ground color of the wings 

 is approximately the same as in the male, but entirely lacks the oliva- 

 ceous tints of that sex and is so heavily shaded with browns of various 

 shades that a different insect is suggested. The head, thorax, and 

 abdomen may vary from lilacinous, through pale yellowish-brown to 

 dark purplish brown, the head and thorax always being the most 

 heavily shaded. Primaries and secondaries with the ornamentation 

 as in the male, but instead of the umber brown shadings is suffused 

 with warm browns, pale yellowish to dark purplish-brown with a. red- 

 dish admixture. Beneath the sexes are much alike, the female, on 

 the whole, a little darker. 



Habitat. — Southern half of California, New Mexico, and Arizona. 

 Specific localities: California: San Diego, March 14 to July 1 : Palo 

 Alto, March; Havilah; Claremont; Alameda. County, May; Los An- 

 geles; Pasadena, May 1; Alta Vista, March 31. New Mexico: Beu- 

 lah, 8,000 feet, July 28 to 31. Arizona,: San Francisco Mountains, 

 8,000 to 10,000 feet, July 23; Yuma County, March. 



This species is allied to the preceding, and for distinguishing charac- 

 ters see remarks under that form. 



PERO BEHRENSARIUS Packard. 



Plate 13, fig. 7; Plate Mi. fig. 1. 



1871. Azelina behrensaria Packard, Proc. Bost. Sue. Nat. Hist., vol. 13, |>. 386. 

 1876. Azelina behrensata Packard, Monogr. Geom., |>. 521, pi. M, fig. 60. 

 1881. Azelina behrensaria Butler, \nn. and Mag. Nat. Bist., ser. ■">. p. 33 



honestaria? 

 1886. Azelina behrensata Hulst, Ent. Amer., vol. 2, p. 19 hubnerata. 

 1896. Azelina behrensata IIii.st, Trans. A.mer. Ent. Soc, vol. 23, p. 380. 



Expanse, 35 to 39 mm. Head and body granite-gray to grayish- 

 brown, the segments of the abdomen usually dark brown posteriorly; 



Proc.N.M.vol.38--10^2l 



