HENRY SKINNER. 211 



The Boreal American Species of CHLORIPPE (Doxo- 

 copa, Apatiira) Lepidoptera. 



BY HENRY SKINNER, M.D., SC.D. 



The species of Chlorippe found in America north of Mexico 

 can readily be divided into two distinct groups by the char- 

 acter of the markings. They may be called the CELTIS 

 GROUP and the CLYTON GROUP. 



The CELTIS GROUP is characterized by having one or 

 more ocelli on the primary wings and a number of white 

 spots. The CLYTON GROUP never has ocelli on the pri- 

 maries and seldom if ever any pure white spots. 



In the CELTIS GROUP there is a black spot, sometimes 

 an ocellus, on the inner margin of the underside of the sec- 

 ondaries, about half-way from the base to the angle of the 

 wing. In some cases it is a mere point, but in other speci- 

 mens or species an oblong ocellus. This spot is never 

 found in the members of the CLYTON GROUP. 



According to our lists and catalogues the names falling in 

 the first or CELTIS GROUP would be celtis, antonia, montis, 

 leilia, codes, alicia. In the CLYTON GROUP, clyton, pro- 

 serpina, ocellata, nig, flora. In the CELTIS GROUP, celtis 

 and alicia may be separated from the remainder owing to 

 the fact that there is a single ocellus on the primaries above 

 the third median nervule. Alicia is larger than celtis and 

 the color is reddish tawny and all the spots and markings 

 are relatively larger. Aritonia has two ocelli on the upper- 

 side of the primaries and three on the underside. It also 

 has three fuscous spots in the discoidal cell on upperside of 

 primaries. Leilia is redder than any other in the group (red- 

 dish chestnut) and has two ocelli, but only two fuscous spots 

 in the discoidal cell, and these spots are separated by a com- 

 paratively light colored area or spot. Leilia is a small form 

 from Sonora, Mexico, and Arizona. The hind wings are 

 somewhat lengthened and concave or excavated on the outer 

 margin. Montis is only slightly different from the Texan 



TRANS. AM. ENT. SOC, XXXVII. 



