A REVISION OF THE DELTOID MOTHS SMITH. 115 



(li'ouiul color, ;i grayish brown, varyiiij^ in tint; in tlie male with 

 bhic'kish powdenn<;s, in the female more or less sutt'used witii reddish. 

 Body of tliegronnd eolor; abdomen more gray. Primaries in the male 

 even, witliont contrast, the lines vaguely traceable in most instances, 

 111 the female the ni>per portion of the median sjjace is darker l)rown, 

 contrasting with the paler shade elsewhere in the wing. This brown 

 shade usually extends less markedly to the upiter part of the basal 

 s[)ace, while its outer inferior angle is very near to the termination of 

 a blackish subapical oblique streak. In some specimens of both sexes 

 the wings are transversely strigate, the strigai brown, rivulous, not 

 continuous, in the females marked only tlirough the darker portions of 

 the wing. Transverse anterior line pale, more or less brown or dark 

 margined, strongly toothed outwardly on the median and submedian 

 veins; rarely distinct, mor(^ otten entirely obsolete, especially in the 

 male. Transverse posterior line pale or whitish, arising abov^e the reni- 

 form and abruptly outcurved over this spot, as a whole nearly upright 

 below it, but with an outward angle in the submedian interspace and 

 an inward tooth on the internal vein. This line is usually more evi- 

 dent in the male. Subterminal line punctiform, consisting of black 

 dots followed by white scales, the line very evenly parallel with the 

 outer margin. The line is best marked in bright females ; it tends to lose 

 the white scales in pale specimens, the black dots alone remaining, and 

 tends to lose the black spots in dark specimens in which the white scales 

 only are obvious. In a few somber gray males even this line is lost. A 

 series of dark or black terminal lunules preceded by white scales. 

 Orbicular a little round tuft of upright black scales. Keuiform marked 

 by two such spots. Beneath the median vein, about the center of the 

 median space, is another small, round tuft of elevated scales. Second- 

 aries an even gray to fuscous, with a brown or darker terminal line. 

 Beneath, more or less powdery, smoky to reddish, the primaries darker 

 on the disk and usually immaculate, the secondaries paler, usually 

 with a discal dot and a rather well-marked median dusky band. 



Expanse of wings, 27.5 to 33 mm. ~ 1. 10 to 1.32 inches. 



Habitat. — Northern United States, from the Atlantic to the Pacific; 

 Canada; British Columbia; southward to Alabama. Colorado in Sep- 

 tendjer, October; British Columbia. May, duly, September, October; 

 Kansas in April; Delaware in August; New York duly, September, 

 October. 



This is at once the most common and widely distributed species of 

 the genus. Its larvte feeds on the hop-vine leaf, and probably wher- 

 ever that plant occurs, there our species will also be found. There is a 

 considerable amount of variation in the ground color, that of the males 

 ranging from an even, sordid reddish brown to almost black. The 

 palest of the forms is H. oUvacea, Grote, the darkest is H. alboiynnctata,, 

 Tepper, the intermediate and typi(;al form is H. f/crmanalix, Walker. 

 The fenuile of //. olinacca is //. eiuoiidalis, (I rote. The coloiation seems 



