GRAPTA VI. 
and at tip; antennse brown annulated with whitish beneath; club black, yellow 
at tip. 
Female. — Same size. 
Upper side less intense, margins more yellow; beneath lighter colored than 
most males, but similarly marked. 
Mature Larva. — Length 1.5 inch. 
Body furnished with six rows of many branching spines; head black, with 
short black spines at vertices; segments from second to eighth, both inclusive, bright 
buff inclining to orange; remaining segments pure white. Along the sides are two 
waved orange lines uniting irregularly; the interspaces, which are buff or white, 
according as they are anterior or posterior, are marked with black dots; above the 
orange lines are some faint black lines, and some black patches are discernible at 
the base of lateral spines; spiracles black, broadly bordered with white; under side 
dull flesh color; feet and pro-legs black with pinkish tinge. 
Chrysalis. — Length 1 inch. 
Color brown, the general shape as in Comma, but the mesonotal process more 
prominent and rounded; the palpi cases more produced and compressed at base; the 
upper tubercles silvered. 
To Mr. Henry Edwards I am indebted for the foregoing description of the 
larva and chrysalis, and to Mr. Stretch for the drawings reproduced on the 
plate. Mr. Edwards informs me that this larva was taken by him in July, 
1871, in the Yo Semite Valley, and was feeding on Azalia occidentalis, a most 
unexpected food-plant for larvae of Grapta. It was raised to maturity, the change 
to chrysalis occuring 29th of July, and the butterfly emerged 15th of August. 
The similarity of this larva to that of C album is remarkable, inasmuch as the 
butterflies belong to different groups of the genus, while the larvae of Comma and 
Satyrus, which species in the imago resemble phases of C album, are wholly unlike 
the larva of the latter. 
In the description of Zephyrus, I have spoken of the three elongated spots in 
cell of primaries on under surface. These are found, similar in shape and scarcely 
varying in position, in all the smaller Graptas. In Progne there are very rarely in- 
stances of same peculiarity, but almost invariably the two upper spots are united and 
produced so as to form a long, narrow band running from subcostal obliquely to 
median at base, and the third spot is produced in the same manner and runs paral- 
lel to the other. Out of numbers of Graptas of other species, I have found no 
instance of these parallel bands except in Progne. In the figure of C Argenteum, 
(synonymous with Progne) in Kirby’s Fauna Bor. Amer. these stripes are well in- 
dicated. 
