BUTTERFLIES OF THE DISTRICT OF COLUMBIA 149 



Genus EUREMA Hiibner 



EUREMA NICIPPE NICIPPE (Cramer) 

 NiCIPPE 



Plate 28, Figure 6 



OcGurrence. — ^Local, and found only along the Potomac; frequent 

 or even rather common on the flats below Chain Bridge and in low 

 ground on the Virginia side of the river, and occasional in the 

 meadows west of Cabin John, Md. 



There are five specimens in the Schonborn collection, two dated 

 July 16, 1888. Mr. Shoemaker reports it common on the Chain 

 Bridge flats in July and also in September. I noticed it in some 

 numbers on the Chain Bridge flats on June 30, 1923. I have speci- 

 mens from Cabin John taken September 8, 1926, September 19 and 

 27, 1925, September 28, 1930, and October 14, 1923. Doctor Chapin 

 has reported it flying about on December 12, 1900. It hibernates in 

 the adult stage. 



Notes. — In the Schonborn collection two of the five specimens, 

 both taken on July 16, 1888, are clear brilliant yellow males. 



In an unusually deep orange male taken on September 28, 1930, 

 at Cabin John the fore wings are tipped with a heavy dusting of 

 yellow scales and the fringe is bright orange; the ground color of 

 the wings beneath is a clear yellow-orange. 



EUREMA LISA (Boisduval and Le Conte) 



Lisa ; Lesser Sulphur 

 Plate 28, Figure 4 



Occurrence. — Abundant in fields and along roadsides wherever the 

 partridge-pea {Ghamaecrista chamaecrista) is common. It is most 

 numerous in the fields along the canal to beyond Cabin John and on 

 dry hillsides in Rock Creek Park, at Silver Spring, and elsewhere. 

 In meadows or pastures with a luxuriant growth of long grass or of 

 tall clover it is usually only casual. 



Habits. — The lisa has a curious errant flight, progressing in a 

 broad irregular zigzag, the direction of which it changes frequently. 

 It keeps about 6 inches above the ground or above the grass tops, 

 and the straight portions of its flight, which combined make up the 

 zigzag, when viewed from the side are seen to be low arcs. There is 

 therefore a suggestion of that skipping so characteristic of our 

 satyrids and of the tailed blue. It is a very active little butterfly, 

 and on sunny days is almost constantly on the wing, though it rests 

 from time to time. 



