OF NORTH AMERICA. 221 



it from any species of North American Ardia known to me ; in the 

 disposition of the stripes on the anterior wings it presents most resem- 

 blance perhaps to Ardia virgo, L." Grote, (loc. cit. ) 



The type of this species collected by Dr. Samuel Lewis, of Phila- 

 delphia, still appears to be unique, and it may^yet prove that we are 

 dealing only with a strongly marked aberrant form of some of our 

 well known species, probably A. Saundersii. The figure is copied 

 from a beautiful drawing by A. Hochstein, very kindly loaned me by 

 Mr. A. Grote. 



12.-AIICTIA YARROWII. N. S. (PL 9, fig. 7, 5 •) 



$, . — Head clothed with long black hairs. Thorax black, lemon 

 yellow outwardly. Abdomen black, both above and beneath, densely 

 and finely scaled, with an indistinct lateral row of crimson dots. Anal 

 tuft silky, pale ferruginous. Legs black ; anterior pair with crimson 

 coxae ; on the middle pair the tips of the tibiae and the femora are like- 

 wise crimson ; on the hind pair the tips of the tibae and ends of the 

 tarsi are also of the same color. (Note ; the specimens from which 

 this description is drawn, has been pressed as flat as a botanical speci- 

 men, and the body parts do not admit of a more detailed description. 

 The antennae are wanting. ) 



Anterior wings velvety black, with very narrow fringes and markings 

 as follows of clear lemon yellow. Five angular costal spots, of which 

 the two nearest the base are quadrate ; the third at the middle of the 

 wing is much narrower ; all of these extend only to the median vein. 

 The fourth is narrow, though wider than the third, and extends across 

 the wing to the anal angle as an irregular band ; being toothed out- 

 wardly about the middle, at the point where it receives the termination 

 of the fifth short irregular spot or band. Below the submedian vein 

 near the base of the wing and opposite the costal spots i and 2, are 

 two small, very reduced spots ; and from the middle of the inner mar- 

 gin springs a very narrow curved band which unites with the middle of 

 the fourth spot, forming with it and the fifth, the usual terminal arctian 

 markings. The disposition of these markings is more like that of 

 E. caja or N. plantaginis than any of the strictly American arctians. 



Posterior wings full, rounded, rather thinly scaled ; basal half black, 

 bounded outwardly by an irregular line extending from the basal two- 

 fifths of the costa to the anal angle. Outer half orange-scarlet, inclin- 



