78 
[July 
Description of certain species of DITIRNAL LEPIDOPTERA found within the 
limits of the United States and British America. No. 2. 
BY WM. H. EDWARDS, RTkwburgh, New York. 
1. Parnassius Sayii, nov. sp. 4. Lycoena Arnica, nov. sp. 
2. Colias Christina, nov. sp. 5. Melitoca Texana, nov. sp. 
H. Colias Helena, nov. sp. 6. Anthocaris Ausonoides, Boisd. 
7. Chionobas Chryxus, Doubleday. 
Parnassius Sayii, nov. sp. 
Female, 2 J inches. Upper side: primaries white, with a broad semi¬ 
transparent margin which encloses a transverse row of white, lunular 
spots; base black: a large rounded spot in the cell, another nearly 
same size on the arc, and a patch on the inner margin: between the 
cell and the sub-marginal row are three white spots running from the 
costa, each surrounded with black; no red spot; fringe of both wings 
white with black points at the tips of the nervures. 
Secondaries white, with a narrow semi-transparent margin, and a 
sub-marginal row of black lunules; base and abdominal margin to the 
end of the body deep black, sending out a hook which passes around 
the extremity of the cell; a large pink spot on the costa, another on 
the disk^ both edged with black: on the abdominal margin, below the 
black space, are two small connected black spots, placed transversely, 
each enclosing a pink spot 
Under side : primaries as above; on secondaries are four black spots 
across the base, each marked with a few pink scales; the black spots 
on the abdominal margin re-appear as three separated spots, the middle 
one largest and triangular, each showing a few pink scales. 
Body black above, below covered with yellow hairs; at the extremity 
of the abdomen a horny pouch shaped as in JVomion: palpi yellow: 
antennm yellowish with fine black rings : club black. 
From the Society’s collection. Taken at Pike’s Peak. 
I am not certain whether this species may not be the one taken for 
Nomion, which is a Siberian species, said in the British Museum Cata¬ 
logue to be found in the Bocky Mountains and California. I have 
examined several specimens of the true Nomion, and it is described 
