Dec.igio] GroSSBECK : NeW SpECIES OF GEOMETRIDiE, £01 



the latter, a deep indentation in the inner edge of the median fascia ; and 

 the subapical patch is larger and prolonged into the wing. All in all, there 

 are so many points of difference toward which the eleven examples of typical 

 interrupta do not tend that I think a varietal name is warranted. 



Type. — One female in Dr. Barnes' collection. , 



Habitat. — Palmerlee, Cochise Co., Arizona. 



3. Hydriomena viridescens, new species. 



Expanse, 23-26 mm. Head pale bluish-green, palpi largely dark brown, 

 antennae whitish, fringed with brown. Thorax greenish, with four brown spots 

 arranged in a square on the dorsum, and one at the inception of each fore 

 wing. Abdomen gray with narrow white bands at the apex of the individual 

 segments dorsally which extend anteriorly in the middle and divide into two 

 parts a brown blotch which just precedes it. Primaries evenly pale bluish- 

 green (which color becomes almost white or yellowish on exposure to light), 

 crossed by ten or eleven denticulate or scalloped narrow black lines. The 

 first, close to the base of the wing, is frequently a mere dot, or may be 

 absent entirely. The second and fourth are curved outwardly and are usu- 

 ally well-defined, and between these runs the third which is diffuse, com- 

 paratively broad, and occasionally incomplete or absent. From the outer of 

 this series of lines to the sixth the ground color is whiter. The sixth line 

 is strongly marked, sharply denticulate and, as a whole, less curved outwardly 

 than any of the others. Line five is narrower but in general the same. The 

 seventh line, very narrow and only faintly denticulate, may run through the 

 elliptical discal spot or directly outside it. Between lines eight and ten which 

 are well scalloped the ground is whiter again and divided into two by a fine 

 line (number nine). The eleventh line is rather broad, diffuse and fre- 

 quently broken, especially in the central portion of the wing. A black blotch 

 between veins R5 and M3 represents the remnant of the twelfth line. Terminal 

 line indicated by a black spot on either side of each vein. Fringe checkered 

 black and faintly pinkish, more or less markedly. Secondaries salmon colored, 

 paler inwardly. Terminal line as in primaries but fainter and more diffuse. 

 Beneath, primaries salmon colored outwardly, the markings of above feebly 

 reflected, and sometimes with a large, diffuse subapical shade. Secondaries 

 as above but with small, dark discal spot. 



Types. — Five males and seven females in the collection of Dr. 

 Barnes and the author. 



Habitat. — Provo, Utah, August 4-14; Santa Catalina Mts., Sept., 

 Huachuca Mts., Baboquivaria Mts., Pima Co., July 15-30 (Poling), 

 and Redington, Arizona. 



This neat little species, of which I have seen other specimens 

 from the same general region, is most nearly related to " Ca:nocalpe " 

 magnoliata On. and differs principally in its smaller size, narrower 



