232 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



somewhat rusty smoky brown, with darker discal spots and a variable 

 number of transverse shade lines. 



Expands, 1.52-1.88 inches=38-47 mm. 



Habitat. — Canada to Florida, west to Colorado. 



In the large series of specimens before me. only the range from 

 Canada to the District of Columbia is represented; dates ranging 

 from May to early July. 



There is no appreciable difference between the sexes and very little 

 variation of any kind in the typical form. The very dark blackish 

 brown base varies a little so that the dead black undulating shade 

 lines may be more or less obvious, and in the same way the velvety 

 black transverse lines are variably relieved. The most conspicuous 

 feature of the primaries is the white blotch interrupting the s. t. line 

 between veins 5 and 6; it may be reduced to only a few white scales, 

 or it may be a conspicuous spot ; but it is always present and is abso- 

 lutely characteristic. 



The variety umbripennis has the area below the cell from t. a. to 

 s. t. lines of a rich brown shade, and along the course of the t. p. a 

 powdering or even a broad shade of lilac gray scales that is very 

 conspicuous. The white spot in the s. t. line is wanting in all exam- 

 ples. The secondaries have the basal area brown like the median 

 area of primaries, and the lilac shading over the outer lines is con- 

 tinuous with that of the primaries. There is never any question as to 

 which is undularis and which is umbripennis, and I was strongly 

 inclined, at first, to consider them specifically distinct. But there is 

 absolutely no material difference in genital structure so far as I can 

 make out, and this type of variation is quite usual in the genus, 

 although not equally well marked in any other species. 



The spinulation of the middle tibia is scant and inconspicuous; 

 in the male almost invisible in the heavy vestiture. The middle 

 femora of the male are conspicuously tufted and hold a very large 

 mass of specialized scales. 



The male genitalia are very nearly symmetrical so far as the 

 harpes are concerned, both sides being long, very much curved, 

 drawn to a point, but with a little, spatulate enlargement before the 

 tip. The supra-anal plate is unusually narrow, and the penis sheath 

 is unusually bent and angled. 



In the female the depressions of the upper side of anal segment 

 are well defined; on the under side the lobes are well marked and 

 approximately equal. The opening to the copulatory pouch is at 

 the inner upper angle of the right lobe and comes from the inner side 

 rather than from the top. 



The species is usually a common one where it occurs. It should 

 be added that the reference of Homoptera nigricans Bethune to the 

 synonymy is made on the basis of Doctor Bethune's own statements 



