GRAPTA I. 
At the last moult, nearly all these were light-colored, many being cream- 
white, and scarcely half a dozen were black. On 4th June, they began to 
change, and by 6th, there were thirty-five chrysalids. On 10th June, the first 
imago appeared, and by 13th, there had emerged thirty-four butterflies, 23*, 11*, 
every one Dryas. One died in chrysalis. Dry as may be considered as the 
prevailing early summer form of the species, and Comma the autumnal. 
A memorandum of the experiment made in 1873 was communicated to the 
“ Canadian Entomologist” for October of that year, and I proposed that the 
name of the species should be Comma, , and the two forms be designated as vars. 
Harrisii and Dryas, in the same way that Interrogations is known in its two 
forms as Interrogations vars. Umbrosa and Fabricii, this formula expressing 
clearly the relationship established. 
A similar connection may exist between other Graptas. From the fact that 
the two forms of Interrogations differ much in outline of wing, in color and 
maikings, while the silver discal spot is identical, and that the same holds good 
of the two forms of Comma, I should not be disposed to look for relationship of 
this nature between two in which the discal spot is essentially different; as where 
one bore the C and the other the angular mark seen in Silenus. That is one 
reason why I do not believe Gracilis will be found dimorphic with Faunus as 
^o§>^ted by Mi. Scudder; the discal spot of the former species being a bent 
mark something like Silenus, but more like Progne, and of the latter a°G, with 
barbed ends. The two species have been found inhabiting the same localities 
in the White Mountains, N. H., and on Anticosti Island by Mr. Couper. But in 
the Catskills, where Faunus swarms in the month of August, the united collecting 
ol Messrs. Mead and Meyer with myself, embracing at least six seasons, have 
never brought to light one Gracilis. Now wherever one form of Interrogations, 
or one of Comma is found, both are found, and it is hardly allowable, unless 
proved, that Faunus could lie dimorphic in one district and not in another. 
Progne and Comma both associate in the Catskills with Faunus, though in vastly 
less numbers. Mr. Couper wrote me on his return from Anticosti, in November, 
1873, that while there, on 21st July, he found a Grapta caterpillar feeding on 
wild currant: in color « yellow, with long and short black marks oh its sides • ” 
and the spines were all “ pink colored.” The length of this was one inch, and 
therefore it was near maturity. As this is not the description of Progne, nor 
