BUTTERFLIES OF THE DISTEICT OF COLUMBIA 



233 



but instead conceals itself in the grass. It is possible, however, that 

 this was due to the cool weather on that day. 



Genus PRENES Scudder 



PRENES OCOLA (Edwards) 



Plate 8, Figure 8 



The Schonborn collection contains four specimens from the Dis- 

 trict taken on August 13 and 16 (2) and on September 4; the year 

 is not stated. The only specimen in my collection was taken at 

 Silver Spring on September 7, 1931. 



Genus CALPODES Hubner 



CALPODES ETHLIUS (Cramer) 



Plate 50, Figures 7, 8 



The United States National Museum collection contains five speci- 

 mens of this species from Washington, D. C. Four of these were 

 collected by A. B. Duckett on August 9, 1911, and are labeled " feed- 

 ing on Canna^'' The fifth was collected by F. H. Chittenden on 

 September 16, 1912. There are no other records. It is probably .a 

 more or less frequent visitor to the District, being brought in on 

 Canna, but not properly a member of the District fauna. 



In addition to the species of Hesperiinae considered in the preced- 

 ing pages, the following may occur in the District : 



Pontes vihex brettus (see p. 254). 

 Pontes mystic (see p. 254). 

 Erynnis attalus (see p. 254). 

 Erynnis metea (see p. 254). 

 Atrytone bimacula (see p. 254). 

 Atrytone dion (see p. 255). 



Anihlyscirtes samoset (see p. 255), 

 Amblyscirtes textor (see p. 255). 

 Poanes aaroni aaroni (see p. 255). 

 Prenes panoquin (see p. 255). 

 Atrytonopsis loamtni (see p. 256). 



SEASONAL OCCURRENCE OF LOCAL BUTTERFLIES 



In Table 2 the occurrence of the local butterflies throughout the 

 season is shown. Each month is divided into halves. A minus sign 

 ( - ) indicates that the species is to be found, but that the individuals 

 are scarce or are in poor condition. A plus sign ( + ) indicates that 

 the species is (or should be) common and all, or at least a large pro- 

 portion, of the individuals are in good condition. 



