74 BULLETIN 15 7, TJ. S. NATIONAL MUSEUM 



a*. Hind wings witti a conspicuous process, a long round-tipped 

 tooth or narrow tail, on the outer border not far below the 

 middle; fore wings with a prominent angle between one- 

 fourth and one-third of the distance from the apex to the 

 lower angle. 

 6\ Upper surface of wings deep maroon with a broad yellow 

 outer border immediately followed by a row of small 



bright blue spots (pi. 9, figs. 1, 2) Vanessa antiopa (p. 91). 



b°. Upper surface of wings brownish red, hind wings more or 



less extensively dark brown and the fore wings bordered 



with dark brown ; light areas on both wings with dark 



brown spots. 



c*. Larger, with the fore wings about 30 mm. in length or 



longer; center of undersurface of hind wings with a 



silver semicolon ; basal quarter of costal border of fore 



wings beneath conspicuously mottled with pale yellow 



and brown; wings narrowly edged with pale violet (pi. 



10, fig. 3) Polyg'onia interrog'ationis (p. 94). 



(?. Smaller, with the f oi-e wings about 26 mm. long ; center of 

 undersurface of hind wings with a silver boomerang- 

 shaped mark; basal quarter of costal border of fore 

 wings beneath transversely streaked with brown and 

 paler brown, not strongly contrasted with the adjacent 

 parts ; wings without violet edging. 

 (Z^ Silver boomerang-shaped mark in the center of the hind 

 wings below suddenly expanded at each end (pi. 11, 



figs. 3, 4) , Polyg'onia comma (p. 95). 



6r. Silver boomerang-shaped mark in the center of the hind 

 wings below sharply pointed at each end (pi. 11, 

 figs. 1, 2) Polygonia progne (p. 97). 



Genus CHLORIPPE Boisduval 



CHLORIPPE CELTIS CELTIS (Boisduval and Lc Conte) 

 HACKBERRY BtJTTEElFLT 



Plate 4, Figure 4 



Occurrence. — Very local, but often common in a very restricted 

 area. Mr. Shoemaker has taken it in Rock Creek Park and in 

 Arlington County, Va., and I have found it at Arlington, Va., at 

 Plummers Island, Md., and in two places in the woods along the 

 canal 2 miles beyond Cabin John. 



It is found in open deciduous woods, especially in open glades and 

 along woodland roads. 



Habits. — As a rule this butterfly keeps high up in the trees, and 

 it is most often noticed from 10 to 15 feet or more above the ground, 

 playing about the ends of branches, perching on the leaves, or dart- 

 ing from one place to another. It is wary and quick and has a very 

 rapid flight, which is never long, and it seems very reluctant to leave 

 its restricted haunts. 



