THE CANADIAN ENTOMOLOGIST. 153 



SOME NEW SPECIES OF NORTH AMERICAN GEOMETRID.-E. 



BY JOHN A. GROSSBECK, NEW BRUNSWICK, N. J. 



The constant receipt of apparently undescribed species of Geomet- 

 ridse for determination, makes it desirable that a few be now and then 

 given names. The following species from Southern California and Arizona 

 represent well-marked forms not very easily confounded with anything 

 hitherto described : 



Hydriometia densata, new species. — Expanse, 25 mm. Head, 

 thorax and abdomen clothed with mixed brown and grayish scales, the 

 gray ones predominating except on the front and on the palpi, where they 

 are largely brown. The abdomen has also two brown dorsal spots, 

 separated by a whitish spot, on the posterior margin of each segment. 

 Primaries grayish, heavily overlaid with dark brown, the cross-lines 

 composed of the ground colour. Basal line geminate, irregular, the 

 interspace filled in with brown. Intradiscal line geminate, begins on 

 costa one-third out from base, and extends, inwardly scalloped, to inner 

 margin; as a whole, the line curves outward, but the large scallop between 

 the cubital and anal veins gives the appearance of an inward curve. 

 Extradiscal line geminate and much waved; begins on costa one-third in 

 from apex, extends outward to radial vein, then curves inward to cubital 

 vein, and outward again before reaching the inner margin. The space 

 between the intra- and extradiscal lines is dark brown, sometimes with 

 darker wavy lines running through it. Subterminal line wavy, whitish in 

 colour, and runs parallel with outer margin throughout its course. 

 Terminal line broken up into black spots arranged one on each side of 

 the veins. Fringe gray, blackish at the veins. Discal spot black, scarcely 

 to be differentiated from the dark band in which it is situated. Two black 

 dashes are between veins M x and M 2 , and M 2 and M 3 , external to the 

 extradiscal line ; sometimes these extend beyond the subterminal line, and 

 sometimes the two are more or less fused together, forming a single large 

 spot. Secondaries smoky, the terminal line and fringe as in primaries. 

 Beneath whitish, washed with pale brownish, which, external to the extra- 

 discal line, becomes distinctly brown on both wings, especially at the apex 

 of the primaries. Extradiscal line on both wings present as whitish 

 bands. Discal spots rather small. Spots composing terminal line almost 

 connected. Fringe as on upper surface. 



Types : Two males in the collection of Dr. Wm. Barnes and in that 

 of the author. 



May, Igoy 



